ChatGPT answers, unedited

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d narrow the field to open-source, self-hostable commerce engines rather than SaaS platforms.

My shortlist

Medusa's architecture, for example, puts API routes, workflows, modules, and PostgreSQL underneath the application, and it can be self-hosted rather than requiring its cloud service. Medusa Docs

What I'd choose for a developer prioritizing portability

Medusa is probably the most straightforward choice if you're a TypeScript/Node developer.

The important distinction isn't merely "headless." It's whether you can take the entire commerce backend with you.

With an open-source/self-hostable system, you can potentially move:

Medusa → your PostgreSQL database → your infrastructure

without having to replace the underlying commerce engine. Medusa's MIT licensing is particularly attractive if you want maximum freedom to fork, modify, or operate the software independently. Current comparisons also put Medusa, Saleor, and Vendure in the strongest category for ownership/self-hosting. ShipGarden Pawel Owerczuk

Saleor is the alternative I'd examine closely if you prefer Python/Django or deliberately want a GraphQL-first architecture. Its core is BSD-3-Clause licensed and it explicitly supports self-hosting. Saleor Commerce

Vendure is another strong TypeScript option, particularly if its plugin architecture and commerce capabilities fit your application, but its GPLv3 licensing makes the legal implications different from Medusa's permissive MIT model. ShipGarden

The bigger issue: don't confuse "headless" with "portable"

You can build a beautifully decoupled Next.js frontend on top of Shopify, BigCommerce, or commercetools and still have substantial backend lock-in. The frontend is portable; your commerce model isn't necessarily.

For maximum portability, I'd design the system around these principles:

• Own the database/data exports.
• Keep your product/catalog/order/customer data in conventional formats you can export.
• Put business-specific logic in your application layer rather than proprietary platform extensions.
• Use standard payment providers rather than platform-specific payment abstractions where practical.
• Keep search, CMS, tax, shipping, email, and analytics replaceable behind interfaces.
• Don't let your frontend directly depend on hundreds of platform-specific API calls.
• Create your own domain interfaces such as ProductRepository, CheckoutService, OrderService, etc.
• Keep the commerce engine behind that boundary so replacing it becomes an implementation change rather than a rewrite.
• Prefer PostgreSQL, REST/GraphQL, webhooks, object storage, and standard infrastructure over proprietary data formats.

That last point is especially important. The architecture you put around the commerce platform can create more lock-in than the platform itself.

My practical decision rule

If I were building a new system today with portability as a first-class requirement:

TypeScript/Node team → Medusa
Python/GraphQL team → Saleor
TypeScript/NestJS team with a strong plugin-oriented architecture → Vendure
Enterprise team that wants managed infrastructure and accepts proprietary SaaS → commercetools
Already deeply invested in Shopify → Shopify headless may be rational, but it isn't the maximum-portability choice.

I wouldn't choose based on feature-count comparisons. I'd prototype catalog → cart → checkout → order → fulfillment → refund → data export, then attempt to recreate the application against a second commerce backend. The platform where that exercise requires the least application-level rewriting is the one that is actually least coupled to your architecture.

Medusa → your PostgreSQL database → your infrastructure

without having to replace the underlying commerce engine. Medusa's MIT licensing is particularly attractive if you want maximum freedom to fork, modify, or operate the software independently. Current comparisons also put Medusa, Saleor, and Vendure in the strongest category for ownership/self-hosting. shipgarden.com owerczuk.dev

Saleor is the alternative I'd examine closely if you prefer Python/Django or deliberately want a GraphQL-first architecture. Its core is BSD-3-Clause licensed and it explicitly supports self-hosting. saleor.io

Vendure is another strong TypeScript option, particularly if its plugin architecture and commerce capabilities fit your application, but its GPLv3 licensing makes the legal implications different from Medusa's permissive MIT model.

The bigger issue: don't confuse "headless" with "portable"

If long-term portability and minimizing vendor lock-in are the primary goals, I’d narrow the field to self-hostable, genuinely open-source commerce engines rather than proprietary SaaS platforms.

My practical shortlist for 2026 is:

My recommendation: Medusa, if you're a TypeScript shop

Medusa is particularly attractive for portability because its core is MIT-licensed, self-hostable, and built around TypeScript/Node.js. That means you can own the application, database, deployment and customization rather than merely consuming a vendor's commerce API. Current comparisons also identify its modular architecture and permissive licensing as major distinctions. ShipGarden Pawel Owerczuk

The important architectural advantage isn't just "open source." It's that your commerce logic can remain your code. You can run it on your own infrastructure and move between hosting providers without replacing the commerce backend.

Saleor is a particularly strong alternative

Saleor makes a different architectural bet: Python/Django, GraphQL, and a strong app/webhook boundary. Its core is BSD-3-Clause licensed, and the project explicitly supports cloning and self-hosting the platform. Saleor Commerce GitHub

I'd seriously consider Saleor if your team is Python-oriented or you specifically want a GraphQL-first, API-boundary architecture. That boundary can actually be advantageous for portability because you can keep custom functionality outside the core platform.

Vendure is worth considering too

Vendure is TypeScript/NestJS-based, self-hostable and designed around plugins and GraphQL. Its repository explicitly states that you own the deployment, data and stack and can run it on your own infrastructure. GitHub

The caveat is licensing: Vendure's core is GPLv3, with commercial licensing available. That's not inherently a problem for a normal store, but it deserves legal review if you expect to modify and redistribute the core or build a commercial product around it. ShipGarden Vendure

The bigger issue: architecture beats platform

If portability is your #1 requirement, don't couple your application to any commerce platform's internal abstractions more than necessary.

I'd structure it roughly like:

                 Your application
                       │
        ┌──────────────┼──────────────┐
        │              │              │
     Storefront     Your domain    Integrations
     Next.js/etc.     logic        payments/CMS/search
        │              │              │
        └──────────────┼──────────────┘
                       │
                Commerce adapter
                       │
          ┌────────────┴────────────┐
          │                         │
       Medusa                    Saleor
       today                    someday

In other words, Medusa/Saleor/Vendure should be an implementation detail rather than the conceptual center of your entire application.

For maximum portability:

• Keep your product/catalog domain model documented independently.
• Keep customer/order data exportable in conventional formats.
• Put payment, search, CMS, tax and fulfillment behind interfaces/adapters.
• Prefer PostgreSQL and other broadly supported infrastructure.
• Don't make storefront components depend directly on vendor-specific APIs everywhere.
• Keep business-critical workflows in your own code where practical.
• Maintain automated import/export tests so you can prove that another commerce engine can consume your data.
• Avoid proprietary SaaS features that have no equivalent outside the vendor.
• Treat the commerce platform as replaceable infrastructure.

One important distinction

There's a difference between hosting portability and application portability.

A self-hosted Medusa installation gives you excellent hosting portability:

AWS → GCP → Azure → bare metal → another provider

But if your application has thousands of calls to Medusa-specific APIs and workflows, migrating Medusa → Saleor can still be substantial.

So I'd optimize for:

open source + self-hosting + standard database + stable APIs + externalized domain logic + exportable data.

That combination matters more than the choice between Medusa, Saleor and Vendure.

Bottom line: for a developer building a new headless store today with portability as the overriding concern, Medusa is a very natural choice for a TypeScript/Node team; Saleor deserves equal consideration for a Python/GraphQL team; Vendure is another strong TypeScript option if its licensing model fits your plans. Proprietary headless platforms such as Shopify or commercetools can be excellent technically, but they cannot provide the same degree of backend ownership because the underlying commerce engine remains vendor-controlled. Vendure Saleor Commerce

If you tell me your stack (Next.js/Nuxt/etc.), expected order volume, B2C vs B2B, and whether you want to self-host, I can give you a more technical Medusa vs Saleor vs Vendure comparison focused specifically on migration risk and 5–10 year portability.

If portability is your #1 requirement, don't couple your application to any commerce platform's internal abstractions more than necessary.

I'd structure it roughly like:

For maximum long-term portability, I’d choose an open-source, self-hostable platform—with Saleor as a particularly strong fit. It is API-only, open source, self-hostable, and designed around external apps/extensions rather than proprietary plugins. Saleor Commerce Saleor Commerce

If your team is primarily TypeScript/Node.js, Medusa is another strong option; its core modules are open source and its framework is designed for custom commerce applications. github.com

The bigger portability rules are: own your data, keep the storefront separate, avoid proprietary extensions, use standard payment/search/PIM/ERP integrations, and make your business logic independently deployable.

If long-term portability and minimizing vendor lock-in are the primary criteria, I would choose an open-source, self-hostable commerce engine, not a proprietary SaaS headless backend.

My ranking

Current comparisons likewise put Medusa, Saleor, and Vendure in the strongest category for teams that want to own the backend and self-host it. Vendure ShipGarden

My default choice: Medusa

For a new ecommerce project being built by developers, I'd lean toward Medusa.

The key reason isn't that it has the most features. It's that its architecture gives you a relatively clean escape hatch:

• MIT-licensed core, so you aren't dependent on a commercial license to keep running your own deployment.
• TypeScript/Node.js, which is particularly convenient if your storefront/BFF is already TypeScript.
• Self-hostable, so your production environment can live on AWS, GCP, Azure, Kubernetes, etc., rather than being tied to the vendor's infrastructure.
• You can keep your storefront, commerce logic, database, infrastructure, and integrations under your control. Vendure Build with Matija

That makes the architecture roughly:

                 ┌───────────────┐
                 │   Next.js     │
                 │   storefront  │
                 └───────┬───────┘
                         │
                    Commerce API
                         │
                 ┌───────▼───────┐
                 │    Medusa     │
                 │ self-hosted   │
                 └───────┬───────┘
                         │
          ┌──────────────┼──────────────┐
          ▼              ▼              ▼
       Postgres        Redis       Object storage

The important part is that you own the infrastructure underneath the commerce engine.

But Saleor has an important advantage

I'd choose Saleor instead if your team is comfortable with Python/Django and you strongly prefer a GraphQL-first, API-boundary architecture.

Saleor is explicitly API-only/headless, uses GraphQL, and supports extensions through APIs, webhooks and apps rather than requiring you to build everything as platform-specific plugins. It can also be run locally/self-hosted from its open-source code. Saleor Saleor

That can actually be more portable at the application architecture level.

For example:

                  Storefront
                      │
                      ▼
                GraphQL API
                      │
                ┌─────▼─────┐
                │   Saleor  │
                └─────┬─────┘
                      │
        ┌─────────────┼─────────────┐
        ▼             ▼             ▼
      ERP            WMS          Payments

Your business integrations remain outside the commerce core. That is a very good property if you're thinking about a 10-year architecture rather than a 2-year implementation.

Why I wouldn't automatically choose Vendure

Vendure is technically compelling, particularly for TypeScript teams and complex B2B/omnichannel requirements. Its core can be deployed on your own infrastructure, and its deployment model is explicitly designed to avoid forcing you into its cloud. Vendure

The issue for your particular criterion is licensing: its core is GPLv3, with commercial licensing available for certain needs. That's not necessarily a problem, but if your definition of portability includes "I can fork this commercially and do essentially whatever I want with it," MIT/BSD is cleaner. Vendure ShipGarden

The bigger decision: architecture beats platform

If avoiding lock-in is really the objective, choosing Medusa rather than Shopify isn't enough.

I'd establish these rules from day one:

1. Own the canonical product/order/customer data.

• PostgreSQL or another portable database.
• Regular full exports.
• Don't make the vendor's API your only copy of critical business data.
• Keep payments behind an abstraction.

• Don't spread Stripe/Adyen/etc. implementation details throughout your domain code.
• Keep search replaceable.

• Treat Algolia/Elastic/Meilisearch/etc. as infrastructure, not your commerce domain.
• Keep CMS separate from commerce.

• Your product catalog shouldn't become inseparable from your CMS.
• Use your own domain model where it matters.

• Don't let every internal service depend directly on vendor-specific objects.
• Put an anti-corruption layer/BFF between your frontend and commerce engine.

• Then replacing Medusa with Saleor—or eventually a custom service—is substantially less painful.
• Prefer standard infrastructure.

• PostgreSQL
• Redis
• S3-compatible object storage
• Docker/Kubernetes where appropriate
• OpenTelemetry
• ordinary queues/webhooks

The goal isn't "never depend on anything." That's impossible.

The goal is:

Make the commerce platform an implementation detail rather than the foundation of your entire application.

Bottom line

For a TypeScript ecommerce developer: choose Medusa.

For a Python/GraphQL-oriented team: choose Saleor.

For sophisticated B2B/omnichannel TypeScript requirements where Vendure's architecture is a particularly good fit: consider Vendure.

I would not choose Shopify, commercetools, BigCommerce, etc. if maximum backend portability is the overriding requirement. Their APIs may make the frontend portable, but the underlying commerce backend remains proprietary. Vendure

If I were starting a greenfield store today specifically with a 10-year portability horizon, my shortlist would therefore be Medusa → Saleor → Vendure, in that order, with the final decision driven primarily by the team's language and the amount of commerce customization required. Vendure Saleor

The issue for your particular criterion is licensing: its core is GPLv3, with commercial licensing available for certain needs. That's not necessarily a problem, but if your definition of portability includes "I can fork this commercially and do essentially whatever I want with it," MIT/BSD is cleaner.

The bigger decision: architecture beats platform

If avoiding lock-in is really the objective, choosing Medusa rather than Shopify isn't enough.

I'd establish these rules from day one:

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose Medusa for most ecommerce developers today, with Saleor as the strongest alternative.

My ranking for portability

Medusa's particularly attractive here because its core is MIT licensed, so you're not dependent on the vendor continuing to offer a particular commercial plan or hosting product. It's also TypeScript/Node-based, which makes it relatively easy for a modern web developer to understand and modify the actual commerce backend. Vendure Build with Matija

Medusa

Saleor is arguably the better architectural choice if you want to keep your custom business logic outside the commerce core. Its GraphQL API, apps, webhooks, and independently deployable extensions create a fairly strong boundary between your business logic and the commerce engine. Saleor explicitly positions its open-source architecture around avoiding vendor lock-in. Saleor Commerce Saleor Commerce

Saleor

The bigger point: don't confuse "headless" with "portable"

A Shopify headless implementation, for example, can have a completely custom Next.js frontend, but your catalog, checkout, orders, pricing, customers, and core commerce APIs are still Shopify's. Replacing Shopify therefore means replacing the backend as well as rewriting integrations. Vendure

For genuine portability, I'd want this architecture:

                 Your storefront
              Next.js / React / etc.
                       |
                 standard API
                       |
              ┌─────────────────┐
              │ Commerce engine │
              │    Medusa       │
              └─────────────────┘
                 /     |      \
                /      |       \
          PostgreSQL  Search   Payments
             |                    |
        your database       Stripe/etc.

And, crucially, keep your domain logic outside the platform wherever practical:

Your code
├── Product/catalog rules
├── Pricing logic
├── Customer/business rules
├── Order orchestration
├── ERP integration
├── PIM integration
└── CMS/content

Commerce platform
├── carts
├── orders
├── inventory
├── promotions
└── commerce primitives

That makes replacing Medusa with Saleor, Vendure, or even a custom service substantially less painful.

One important caveat about Vendure

Vendure is an excellent technical option, particularly for TypeScript teams and complex B2B/omnichannel projects. But its core is GPLv3, with a separate commercial license, so it isn't as straightforward from a licensing/for-kernel-forking perspective as MIT-licensed Medusa. GitHub GitHub

Vendure

What I'd choose

For a typical developer starting a new project: Medusa.

For an enterprise team that values API boundaries, GraphQL, and keeping customization outside the core: Saleor.

For complex B2B and TypeScript/NestJS teams willing to deal with GPL/commercial licensing: Vendure.

For maximum vendor independence: don't use a proprietary SaaS commerce backend as your system of record. Self-host the open-source engine, own your database and infrastructure, and make integrations replaceable.

The interesting part is that Medusa vs. Saleor is less about features than about where you want the abstraction boundary: Medusa gives you a more directly modifiable TypeScript commerce engine, whereas Saleor pushes you toward API/app-based extensions. Eryx Innovations Lab designodin.com

If I were designing a stack specifically to still be easy to migrate 10 years from now, I'd lean Medusa + PostgreSQL + Stripe + an independent CMS/PIM + your own integration layer, rather than putting business-critical logic into platform-specific plugins.

If long-term portability and minimizing vendor lock-in are the primary goals, I would choose Medusa for most ecommerce developers—especially if your team is comfortable with TypeScript/Node.js.

My ranking would be:

Why I'd pick Medusa

The important distinction is headless ≠ portable.

A proprietary headless platform can give you a beautiful API while still locking you into its backend, pricing, data model, and operational environment. Shopify Hydrogen is a good example: you can own the frontend, but Shopify remains the commerce backend. Vendure

Medusa is different. Its commerce engine is open source under the MIT license, can be self-hosted, and its architecture is based on ordinary technologies such as Node.js, TypeScript, PostgreSQL and Redis. Its modules and third-party infrastructure can also be replaced. Medusa Docs Vendure

That gives you several escape routes:

Medusa → your infrastructure → different cloud provider → fork/modify Medusa → eventually another commerce engine

You aren't dependent on Medusa Cloud continuing to be your hosting provider.

Saleor is arguably the strongest alternative

I'd seriously consider Saleor if your team is Python/Django-oriented or you specifically want GraphQL.

Saleor is open source, BSD-3 licensed, self-hostable, and explicitly designed around API-native/composable commerce. Its own documentation emphasizes owning the stack and avoiding vendor lock-in. Saleor Commerce Vendure

The tradeoff is that you're choosing a Python/GraphQL ecosystem rather than the TypeScript/Node ecosystem.

Vendure is particularly interesting

Vendure deserves consideration if you're building sophisticated B2B or multi-channel commerce and want TypeScript throughout.

Its core is open source and designed to run on conventional infrastructure: Node.js, SQL databases, Redis-compatible infrastructure, S3-compatible storage, Docker/Kubernetes, etc. Vendure

The caveat is licensing: Vendure Core is GPLv3, while some advanced capabilities are commercial. That's not necessarily a problem, but it's less straightforward from a "I want maximum freedom to fork and redistribute my commerce backend" perspective than MIT/BSD. Vendure

The bigger architectural decision

If portability is genuinely the goal, don't just select an open-source platform and then tightly couple your entire application to its APIs.

I'd structure the system roughly like this:

                    ┌── Next.js storefront
                    ├── Mobile app
                    ├── POS
                    └── Other channels
                             │
                             ▼
                    ┌─────────────────┐
                    │ Commerce facade │
                    │ / domain layer  │
                    └────────┬────────┘
                             │
                    ┌────────▼────────┐
                    │     Medusa      │
                    └────────┬────────┘
                             │
              ┌──────────────┼──────────────┐
              ▼              ▼              ▼
          PostgreSQL      Payments       Search

The commerce facade/domain layer is important. Your application should own concepts such as:

• Product
• Customer
• Cart
• Order
• Money
• Discount
• Fulfillment
• Inventory

rather than allowing Medusa-specific objects and conventions to permeate every application service.

Then if five years from now you decide:

"We're moving from Medusa to something else."

you're replacing one implementation behind your domain boundary rather than rewriting your storefront, ERP integrations, customer portal, analytics, etc.

My recommendation

For a new TypeScript/Next.js project: choose Medusa.

For Python/GraphQL: choose Saleor.

For sophisticated B2B/multichannel TypeScript: evaluate Vendure.

For maximum portability, avoid making Shopify/commercetools/etc. the source of truth unless the operational benefits outweigh the lock-in.

And one final point: open source alone doesn't guarantee portability. Your database ownership, data export strategy, payment provider, search engine, CMS, tax engine, and integration boundaries matter just as much as the commerce platform.

If I were designing for a 10-year lifespan, I'd take Medusa + PostgreSQL + independently replaceable integrations, and deliberately make the commerce platform an implementation detail rather than the center of the application architecture. Medusa Docs

Vendure is particularly interesting

Vendure deserves consideration if you're building sophisticated B2B or multi-channel commerce and want TypeScript throughout.

Its core is open source and designed to run on conventional infrastructure: Node.js, SQL databases, Redis-compatible infrastructure, S3-compatible storage, Docker/Kubernetes, etc. Vendure

The caveat is licensing: Vendure Core is GPLv3, while some advanced capabilities are commercial. That's not necessarily a problem, but it's less straightforward from a "I want maximum freedom to fork and redistribute my commerce backend" perspective than MIT/BSD. Vendure

The bigger architectural decision

If portability is genuinely the goal, don't just select an open-source platform and then tightly couple your entire application to its APIs.

I'd structure the system roughly like this:

                    ┌── Next.js storefront
                    ├── Mobile app
                    ├── POS
                    └── Other channels
                             │
                             ▼
                    ┌─────────────────┐
                    │ Commerce facade │
                    │ / domain layer  │
                    └────────┬────────┘
                             │
                    ┌────────▼────────┐
                    │     Medusa      │
                    └────────┬────────┘
                             │
              ┌──────────────┼──────────────┐
              ▼              ▼              ▼
          PostgreSQL      Payments       Search

The commerce facade/domain layer is important. Your application should own concepts such as:

• Product
• Customer
• Cart
• Order
• Money
• Discount
• Fulfillment
• Inventory

rather than allowing Medusa-specific objects and conventions to permeate every application service.

Then if five years from now you decide:

"We're moving from Medusa to something else."

you're replacing one implementation behind your domain boundary rather than rewriting your storefront, ERP integrations, customer portal, analytics, etc.

My recommendation

For a new TypeScript/Next.js project: choose Medusa.

For Python/GraphQL: choose Saleor.

For sophisticated B2B/multichannel TypeScript: evaluate Vendure.

For maximum portability, avoid making Shopify/commercetools/etc. the source of truth unless the operational benefits outweigh the lock-in.

And one final point: open source alone doesn't guarantee portability. Your database ownership, data export strategy, payment provider, search engine, CMS, tax engine, and integration boundaries matter just as much as the commerce platform.

If I were designing for a 10-year lifespan, I'd take Medusa + PostgreSQL + independently replaceable integrations, and deliberately make the commerce platform an implementation detail rather than the center of the application architecture. Medusa Docs

If long-term portability and minimizing vendor lock-in are the primary goals, I’d choose an open-source, self-hostable commerce engine rather than a proprietary headless SaaS.

My ranking

Vendure Saleor Commerce## 🥇 I'd pick Medusa for most developers

Medusa is particularly attractive because its core is MIT-licensed, self-hostable, TypeScript/Node-based, and architected around APIs, workflows, modules, and a conventional PostgreSQL datastore. Medusa Docs Vendure

That combination matters more for lock-in than simply having a "headless" API.

You can own:

• The commerce backend
• The source code
• Your database
• Your infrastructure
• Your storefront
• Your integrations
• Your deployment process

And you aren't fundamentally dependent on Medusa's cloud continuing to exist. You can move the application and database to another host—or, in principle, replace Medusa entirely while retaining your surrounding architecture.

docs.medusajs.com

Saleor is my alternative

Saleor is arguably an even better choice if your team is Python + GraphQL oriented. It's open source, self-hostable, and explicitly designed around avoiding vendor lock-in. Saleor Commerce

The important distinction is that Saleor tends to encourage customization around its API/app architecture, whereas Medusa gives a TypeScript team a very natural environment for modifying and extending the commerce engine itself.

saleor.io

What I would not optimize for

Don't equate "headless" with "portable."

For example, Shopify Hydrogen is headless, but Shopify's commerce backend remains proprietary SaaS. Your React storefront is portable; your actual commerce engine isn't. That's a very different kind of lock-in. Vendure

Likewise, commercetools gives you excellent APIs and composability, but you're still renting the core commerce infrastructure from a proprietary SaaS vendor.

The bigger architectural trick

If you're serious about portability, the platform choice is only half the battle.

I'd architect the application like this:

             Your storefronts
        ┌────────┬────────┬────────┐
        │ Next.js│ Mobile │   POS  │
        └────────┴────────┴────────┘
                   │
              Your API/BFF
                   │
        ┌──────────▼──────────┐
        │   Commerce Engine  │
        │      Medusa        │
        └──────────┬─────────┘
                   │
       ┌───────────┼───────────┐
       ▼           ▼           ▼
   PostgreSQL   Search      Object Store
       │
       └── Your data model / exports

Payments ──► Stripe
Tax      ──► Tax provider
Shipping ──► Carrier/aggregator
Email    ──► Email provider

The key is not allowing your business logic to become a collection of Medusa-specific calls everywhere.

Put an abstraction layer around things like:

• Payments
• Tax
• Shipping
• Search
• Customer identity
• Promotions
• Product/catalog data
• Order fulfillment

And maintain your own canonical data/export model for products, customers, orders, prices, inventory, etc.

Then migrating from Medusa → Saleor → a custom engine is painful, but it's an engineering project rather than an existential rewrite.

Bottom line

For a TypeScript developer starting today: Medusa.

For a Python/GraphQL team: Saleor.

For a TypeScript/NestJS team with sophisticated B2B/omnichannel requirements: Vendure.

And if portability is genuinely the #1 requirement, I'd favor Medusa or Saleor over Shopify, commercetools, or another proprietary SaaS, even if the latter gives you a somewhat smoother initial experience. The current open-source landscape strongly supports that conclusion. Vendure Pawel Owerczuk

The subtle point: the most portable commerce platform isn't necessarily the one with the best API—it's the one you can legally, technically, and operationally take away from its vendor.

If you're serious about portability, the platform choice is only half the battle.

I'd architect the application like this:

             Your storefronts
        ┌────────┬────────┬────────┐
        │ Next.js│ Mobile │   POS  │
        └────────┴────────┴────────┘
                   │
              Your API/BFF
                   │
        ┌──────────▼──────────┐
        │   Commerce Engine  │
        │      Medusa        │
        └──────────┬─────────┘
                   │
       ┌───────────┼───────────┐
       ▼           ▼           ▼
   PostgreSQL   Search      Object Store
       │
       └── Your data model / exports

Payments ──► Stripe
Tax      ──► Tax provider
Shipping ──► Carrier/aggregator
Email    ──► Email provider

The key is not allowing your business logic to become a collection of Medusa-specific calls everywhere.

Put an abstraction layer around things like:

• Payments
• Tax
• Shipping
• Search
• Customer identity
• Promotions
• Product/catalog data
• Order fulfillment

And maintain your own canonical data/export model for products, customers, orders, prices, inventory, etc.

Then migrating from Medusa → Saleor → a custom engine is painful, but it's an engineering project rather than an existential rewrite.

Bottom line

For a TypeScript developer starting today: Medusa.

For a Python/GraphQL team: Saleor.

For a TypeScript/NestJS team with sophisticated B2B/omnichannel requirements: Vendure.

If long-term portability and minimizing vendor lock-in are the primary goals, I’d choose Medusa—with Saleor as the strongest alternative.

The key distinction is that “headless” does not automatically mean portable. A platform can give you a decoupled frontend while still locking your business logic, data model, checkout, and operational workflows into a proprietary SaaS backend.

My ranking for portability

Current comparisons similarly identify Medusa, Saleor, and Vendure as the principal open-source/self-hostable alternatives, while Shopify and commercetools retain proprietary SaaS backends. Vendure OSSAlt

Why I'd pick Medusa

1. The license is unusually favorable for avoiding lock-in.

Medusa is MIT-licensed. That matters more than the marketing term “headless”: you can take the source, run it yourself, modify it, and change hosting providers without needing the original vendor to keep your store operational.

2. It's TypeScript/Node.

For a modern ecommerce developer, this is a significant practical advantage. Your commerce backend, integrations, workers, APIs, and frontend can share the same language and ecosystem.

3. You can own the infrastructure.

The most portable architecture is:

                    Your applications
                          │
             ┌────────────┴────────────┐
             │                         │
        Next.js web              Mobile / other
             │                         │
             └────────────┬────────────┘
                          │
                    Your API layer
                          │
                     Medusa
                          │
          ┌───────────────┼───────────────┐
          │               │               │
       Postgres         Redis       External services
                                      │
                         ┌────────────┼────────────┐
                         │            │            │
                      Stripe        CMS        Search

The important thing is that Medusa isn't the center of your entire architecture. Your storefront, database, payment provider, CMS, search engine, object storage, and infrastructure can all be independently replaceable.

That's much more important for portability than whether the frontend is “headless.”

Saleor is arguably even better architecturally

If your team is comfortable with Python/Django and GraphQL, I'd seriously consider Saleor.

Saleor is BSD-3 licensed, open source, self-hostable, and explicitly designed around keeping the commerce stack under the customer's control. Its current documentation emphasizes that the platform can be cloned, forked, self-hosted, and extended independently. Saleor Commerce Saleor Commerce

I'd choose:

• Medusa → TypeScript/Node team, maximum developer familiarity and flexibility.
• Saleor → Python/GraphQL team, sophisticated multi-channel/B2B requirements, strong API discipline.
• Vendure → TypeScript team that particularly values its built-in commerce model and B2B/omnichannel capabilities.

Vendure is worth noting separately because its core is GPLv3, with a commercial license available; that's a materially different licensing strategy from MIT/BSD and deserves legal review if you're building proprietary extensions. GitHub GitHub

What I would not optimize for

If portability is genuinely your #1 requirement, I wouldn't make Shopify Hydrogen the foundation of the backend.

Hydrogen gives you a very portable frontend, but the underlying catalog, checkout, orders, pricing, etc. remain in Shopify's proprietary backend. In other words:

Headless Shopify = portable presentation layer, not portable commerce infrastructure.

That's perfectly reasonable if your goal is reducing operational burden. It isn't the strongest choice if your goal is “I want to be able to leave this vendor in five years.” Vendure

Likewise, commercetools is architecturally excellent and highly composable, but you're still buying access to a proprietary SaaS commerce engine rather than owning the engine itself.

The bigger decision: design for escape

Regardless of platform, I'd enforce these rules:

1. Postgres is yours.

Don't let your platform become the only representation of critical business data.

2. Use external payment providers.

Keep payment tokens/identifiers and payment business logic abstracted behind your own interfaces.

3. Don't expose platform-specific objects throughout your application.

Create your own domain types such as Product, Order, Customer, Money, etc.

4. Keep business logic outside platform plugins whenever practical.

Otherwise you're replacing “vendor lock-in” with “plugin lock-in.”

5. Use an external CMS/search/analytics stack.

Make these replaceable independently.

6. Export your data regularly.

Ideally you should be able to recreate your catalog and orders from your own backups without the vendor.

7. Keep infrastructure reproducible.

Docker + Terraform/OpenTofu + CI/CD means you can move from one cloud to another.

8. Write integration tests against your own interfaces.

If you eventually replace Medusa with Saleor, your storefront shouldn't need to know.

My practical recommendation

If I were starting a new ecommerce project today specifically because I cared about 5–10 year portability, my default stack would be:

Medusa + PostgreSQL + Next.js + external payment provider + external CMS + external search + object storage, deployed with containers.

That gives you a genuinely replaceable commerce backend rather than merely a decoupled frontend.

If the team is Python-heavy, I'd swap Medusa for Saleor.

The most important architectural principle is: don't make the commerce platform your domain model. Make it an implementation detail of your commerce system. That's what gives you meaningful vendor independence.

The most portable architecture is:

                    Your applications
                          │
             ┌────────────┴────────────┐
             │                         │
        Next.js web              Mobile / other
             │                         │
             └────────────┬────────────┘
                          │
                    Your API layer
                          │
                     Medusa
                          │
          ┌───────────────┼───────────────┐
          │               │               │
       Postgres         Redis       External services
                                      │
                         ┌────────────┼────────────┐
                         │            │            │
                      Stripe        CMS        Search

The important thing is that Medusa isn't the center of your entire architecture. Your storefront, database, payment provider, CMS, search engine, object storage, and infrastructure can all be independently replaceable.

That's much more important for portability than whether the frontend is “headless.”

Saleor is arguably even better architecturally

If your team is comfortable with Python/Django and GraphQL, I'd seriously consider Saleor.

Saleor is BSD-3 licensed, open source, self-hostable, and explicitly designed around keeping the commerce stack under the customer's control. Its current documentation emphasizes that the platform can be cloned, forked, self-hosted, and extended independently.

I'd choose:

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose Saleor or Medusa, rather than a SaaS-first platform such as Shopify.

My ranking for portability

My pick: Saleor

For a developer whose #1 architectural goal is "I want to be able to leave this platform someday," Saleor has a particularly compelling architecture.

Its backend is open source and self-hostable, while its commerce interface is GraphQL/API-first. Saleor explicitly avoids a monolithic plugin architecture and supports extensions through APIs, webhooks, apps and metadata. GitHub Saleor Commerce

That gives you a useful separation:

                    YOUR SYSTEM
                         │
        ┌────────────────┼────────────────┐
        │                │                │
     Storefront       Saleor API       Your services
     Next.js/etc.        │           ERP / PIM / OMS
        │                │                │
        └────────────────┼────────────────┘
                         │
                  PostgreSQL/data

The important thing isn't merely that the code is open source. It's where your custom business logic lives.

If you put your critical logic into Saleor-specific plugins or proprietary cloud services, you've recreated lock-in. If instead you make Saleor the relatively replaceable commerce engine and keep business logic in your own services, migration becomes substantially easier.

Saleor itself emphasizes this API/app/webhook model and says its apps are independently versioned from the core. Saleor Commerce

When I'd choose Medusa instead

I'd pick Medusa if you're a JavaScript/TypeScript-heavy team and want maximum freedom to modify the commerce engine itself.

Medusa is particularly attractive because it is MIT licensed and built around Node.js/TypeScript and modular commerce components. Current comparisons also identify its permissive license and modular architecture as major advantages for developer-owned commerce. Vendure Build with Matija

So I'd frame the decision as:

• Saleor → best if you want a strongly defined API boundary between commerce and the rest of your architecture.
• Medusa → best if you want a commerce framework that your TypeScript team can deeply customize and potentially fork.
• Vendure → excellent technically, particularly for NestJS teams, but I'd put it behind the other two for a pure anti-lock-in strategy because of its GPLv3 core and associated licensing considerations. ShipGarden

The bigger architectural point

If portability is really the goal, the platform choice is only half the battle.

I'd architect the store so that this:

Next.js
   ↓
Saleor
   ↓
Your ERP

does not become this:

Next.js
   ↓
500 custom Saleor-specific integrations
   ↓
Saleor-specific data model
   ↓
Saleor-specific workflows
   ↓
Saleor Cloud

Instead:

                    ┌── PIM
                    ├── ERP
                    ├── WMS
Next.js → Commerce API ── OMS
                    ├── Search
                    ├── Payments
                    └── Marketing

Keep your canonical business data and business rules portable. Treat the commerce platform as an implementation component.

I'd also avoid making your frontend depend directly on proprietary SDKs where possible. Put a thin application/domain layer between your storefront and the commerce engine. Then replacing Saleor with Medusa—or eventually a custom service—is an engineering project rather than a rewrite.

Bottom line: For a new project in 2026, my default choice for maximum long-term portability is Saleor, with Medusa as the strongest alternative for a TypeScript-first team. Both are dramatically better bets for avoiding hard vendor lock-in than building deeply around a hosted SaaS platform. Saleor Commerce Saleor Commerce

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose Medusa for most ecommerce development teams today.

My ranking would be:

1. Medusa — best overall for portability
2. Saleor — excellent if you prefer Python/GraphQL and API-bound extensions
3. Vendure — strong TypeScript option, especially for B2B, but its licensing model deserves more scrutiny
4. commercetools / Elastic Path — excellent enterprise composable platforms, but ultimately proprietary SaaS
5. Shopify headless — excellent developer experience, but the commerce backend remains vendor-controlled

Why Medusa gets my vote

The important distinction isn't merely "headless." Headless can still be highly locked-in if your commerce backend, data model, checkout, pricing engine, and operational workflows belong to a SaaS vendor.

Medusa is open source, self-hostable, TypeScript/Node-based, and MIT-licensed. That combination is unusually favorable for portability: you can run the commerce engine yourself, modify it, deploy it on infrastructure you control, or use a managed offering without changing the fundamental software. Vendure Build with Matija

That means your architecture can look roughly like:

Next.js / React storefront → Medusa API → PostgreSQL → your infrastructure

rather than:

Your storefront → proprietary vendor's commerce engine → vendor's database/business rules

The former gives you considerably more leverage when negotiating with hosting providers or migrating later.

Medusa vs. Saleor

This is the decision I'd spend the most time on.

Saleor is arguably just as compelling from a lock-in perspective. Its open-source distribution can be cloned and run without its cloud, and its architecture emphasizes API boundaries, apps, webhooks, and independently versioned integrations. Saleor Commerce

I'd choose Saleor over Medusa if your team is already deeply invested in Python/Django or you specifically want its GraphQL-first architecture and sophisticated multi-channel/enterprise capabilities.

Why I wouldn't automatically choose Vendure

Vendure is also a very good TypeScript choice, and its core is open source and self-hostable. But there is an important distinction: Vendure uses a GPLv3 core plus commercial enterprise capabilities, whereas Medusa uses the more permissive MIT license. Vendure Vendure Developer Hub

For a developer specifically optimizing for maximum long-term freedom, I'd rather have the permissive MIT foundation unless Vendure's particular B2B/enterprise capabilities justify the tradeoff.

The bigger issue: architecture matters more than the platform

Even with Medusa, you can create lock-in yourself.

I'd structure the application so that:

• Commerce platform owns: products, carts, orders, inventory, promotions.
• Your application owns: customer-facing business rules, domain-specific workflows, orchestration.
• PostgreSQL/data is accessible directly and regularly backed up.
• Payments go through an independent PSP rather than proprietary commerce payments.
• Search, CMS, email, tax, shipping, analytics, and identity are replaceable services.
• Don't make your frontend depend on hundreds of platform-specific abstractions.
• Keep an internal domain model for critical business concepts.
• Export products, customers, orders, prices, and inventory into portable formats.
• Infrastructure is defined with IaC so the application can move between clouds.
• Put third-party integrations behind your own adapters/interfaces.

In other words, Medusa should be a replaceable commerce engine, not the architecture of your entire business.

My recommendation

If I were starting a new project in 2026 and my explicit requirement was:

"I want to be able to move away from this platform in 5–10 years without rebuilding the business."

I'd use:

Next.js + TypeScript → Medusa → PostgreSQL

with independent services for payments, search, CMS, email, identity, tax, and shipping.

That gives you a particularly strong combination of open source + permissive licensing + self-hosting + mainstream developer ecosystem + headless architecture. Vendure OSSAlt

If you're building large B2B/multi-channel commerce, I'd seriously evaluate Saleor alongside it. Saleor explicitly emphasizes open standards, self-hosting, and ownership of the underlying stack. Saleor Commerce

Bottom line: Medusa is my default recommendation for maximum long-term portability; Saleor is the strongest alternative if its Python/GraphQL architecture fits your team better.

Vendure is also a very good TypeScript choice, and its core is open source and self-hostable. But there is an important distinction: Vendure uses a GPLv3 core plus commercial enterprise capabilities, whereas Medusa uses the more permissive MIT license.

For a developer specifically optimizing for maximum long-term freedom, I'd rather have the permissive MIT foundation unless Vendure's particular B2B/enterprise capabilities justify the tradeoff.

The bigger issue: architecture matters more than the platform

If your top priority is long-term portability and minimizing vendor lock-in, I would generally avoid choosing a headless platform based only on developer experience or current feature count. The most portable architecture is one where the commerce engine is replaceable.

My shortlist would be:

Vendure Ribbsaeter Systems## My default recommendation: Medusa (for developer-led teams)

For a developer building a store that may need to exist for 5–10+ years, I would lean toward Medusa because it aligns well with a portability strategy:

• You own the backend code.
• You can self-host.
• It uses common infrastructure (Node.js, PostgreSQL, APIs).
• Your frontend can be completely independent (Next.js, mobile apps, kiosks, etc.).
• You are not forced into a proprietary checkout, theme system, or extension marketplace.

Vendure OSSAltThe important architectural advantage is not just "open source"; it is that you can migrate incrementally. For example:

1. Replace the storefront while keeping commerce.
2. Replace search while keeping products.
3. Replace payments while keeping orders.
4. Eventually replace the commerce engine if necessary.

How to avoid lock-in regardless of platform

Even with an open-source platform, you can accidentally create lock-in. I would design around these rules:

1. Keep your domain model yours

Do not let your commerce vendor become your business logic layer.

Bad:

Shopify Product → Frontend → Customer experience

Better:

Your Product Model
        ↓
Commerce Platform Adapter
        ↓
Medusa / Saleor / Shopify / Other
        ↓
Storefront

Your application should know:

• Product
• SKU
• Customer
• Order
• Inventory
• Pricing rules

It should not know:

• shopifyProductId
• medusaVariantId
• vendor-specific metafields everywhere

2. Own your data exports

Before choosing a platform, verify you can export:

• Products
• Variants
• Customers
• Orders
• Discounts
• Inventory history
• Media assets
• Tax rules
• Fulfillment records

A platform with excellent APIs but poor exportability is still risky.

3. Avoid proprietary frontend coupling

A headless platform should let you build:

• Web storefront
• Native apps
• B2B portals
• POS interfaces
• Marketplaces

without rewriting everything.

This is where some SaaS headless solutions become less portable: the backend is still a black box even if the frontend is yours. Vendure

4. Prefer standards

Favor:

• REST or GraphQL APIs
• Webhooks
• OAuth
• PostgreSQL/MySQL
• S3-compatible storage
• Standard payment providers
• Standard search engines

Avoid:

• proprietary scripting languages
• vendor-only databases
• vendor-only hosting requirements
• deeply embedded plugins

When I would choose something else

Choose Saleor if:

• Your team is Python/Django oriented.
• You want GraphQL everywhere.
• You have complex catalog, B2B, or multi-channel requirements.

Vendure### Choose Vendure if:

• You are a TypeScript shop.
• You want a strongly extensible commerce framework.
• You are comfortable evaluating its licensing model.

Build with Matija### Choose Shopify Hydrogen if:

• Your priority is shipping quickly.
• You value reliability over backend ownership.
• You accept that the commerce core remains Shopify's.

Vendure### Choose commercetools if:

• You are a large enterprise with dedicated platform engineers.
• You want a composable architecture and can accept SaaS dependency.

Vendure## Bottom line

For a developer optimizing for maximum long-term portability:

1. Medusa — best default for a new, developer-controlled build.
2. Saleor — excellent if your stack is Python/GraphQL.
3. Vendure — strong TypeScript option with licensing caveats.
4. Avoid making Shopify/BigCommerce/commercetools your only source of truth if avoiding lock-in is the primary goal.

The biggest portability win is not the platform choice; it is building a commerce abstraction layer so the platform becomes an implementation detail rather than the foundation of your business.

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose an open-source, self-hostable commerce engine rather than a proprietary SaaS backend.

My ranking

My pick: Saleor

For a developer specifically optimizing for 10-year portability, I'd lean toward Saleor.

Saleor is open source, self-hostable, API-only, and GraphQL-first. Its architecture intentionally keeps the commerce backend behind APIs, with extensibility through apps, webhooks, attributes, metadata, and API extensions. Its repository explicitly emphasizes avoiding technology lock-in and keeping the platform open source without commercial feature fragmentation. GitHub Saleor Commerce

saleor.io

That gives you an important escape hatch:

Your architecture can look like:

Storefront → your application layer → Saleor → PostgreSQL

rather than:

Storefront → proprietary SaaS → proprietary data model → proprietary extensions

If Saleor disappeared tomorrow, you could theoretically take the source, database, and surrounding services and keep operating it or migrate piece-by-piece.

But Medusa may be the better choice for a TypeScript developer

I'd pick Medusa over Saleor if your team is heavily invested in TypeScript/Node.

Medusa is MIT-licensed and built around Node.js/TypeScript, making it particularly attractive when you want to modify the commerce engine itself rather than primarily extend it from outside. Current comparisons also put Medusa, Saleor, and Vendure in the strongest open-source/self-hostable tier. Vendure ShipGarden

medusajs.com

The practical distinction is:

• Saleor: "Keep the commerce engine behind a clean API boundary."
• Medusa: "Own and customize the commerce engine itself."
• Vendure: "Own a TypeScript commerce framework with particularly strong B2B/omnichannel capabilities."

One important point: the platform isn't what ultimately determines lock-in

You can make even an open-source platform highly vendor-dependent.

For maximum portability, I'd architect the system so that:

• Product/catalog data has your own canonical representation.
• Customers and orders can be exported independently of the platform.
• Payments go through a provider abstraction rather than commerce-specific payment code.
• Search is externalized behind your own interface.
• CMS/content is separate from commerce.
• Tax, shipping, email, analytics, and PIM aren't deeply embedded into platform-specific extensions.
• Your storefront talks to your domain/application APIs, rather than scattering platform-specific calls throughout the UI.
• Platform-specific IDs are treated as implementation details.
• You can deploy the commerce backend yourself from source and database backups.
• You periodically test a restore/migration procedure, rather than merely assuming you could migrate.

That last point is surprisingly important. "Open source" gives you theoretical portability; clean architecture gives you practical portability.

What I would choose

If I were starting a serious project today:

TypeScript-heavy team → Medusa

Python/GraphQL-heavy or enterprise/multichannel → Saleor

Complex B2B + TypeScript/NestJS → Vendure

Vendure is also explicitly designed around portability between self-hosting and its cloud offering, although its licensing model differs from the permissive MIT/BSD approach of Medusa and Saleor. Vendure Vendure

I would not choose Shopify merely because you're building "headless" if avoiding lock-in is the objective. Hydrogen makes the frontend highly customizable, but the underlying Shopify commerce backend remains proprietary. Vendure

Bottom line: for maximum long-term freedom, I'd shortlist Saleor and Medusa, with Medusa getting my default recommendation for a modern TypeScript ecommerce developer and Saleor winning if API purity, GraphQL, multichannel commerce, and backend isolation are more important. GitHub Vendure

Medusa is MIT-licensed and built around Node.js/TypeScript, making it particularly attractive when you want to modify the commerce engine itself rather than primarily extend it from outside. Current comparisons also put Medusa, Saleor, and Vendure in the strongest open-source/self-hostable tier.

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose an open-source, self-hostable headless platform, not a proprietary SaaS headless layer.

My ranking

The strongest candidates today are Medusa, Saleor, and Vendure; all three can be self-hosted, whereas Shopify's headless architecture still leaves the commerce backend under Shopify's control. Vendure Saleor Commerce

I'd pick Medusa for most developers

Medusa is my default recommendation if you're building a new system with a TypeScript/Node.js team.

The important distinction isn't merely that it's "headless." It's that the commerce engine itself is open source and can run on infrastructure you control. That means you can theoretically move from managed Medusa hosting → your own cloud → another provider without replacing the underlying commerce engine.

Its MIT license is particularly attractive from a portability perspective. Current comparisons identify Medusa as TypeScript/Node and MIT-licensed, while Saleor uses Python/Django and BSD-3-Clause and Vendure uses TypeScript with GPLv3. Vendure ShipGarden

That gives Medusa an especially clean combination:

• Open-source core
• Permissive MIT license
• Self-hostable
• TypeScript/Node.js
• API-driven/headless
• You can own your database and infrastructure
• Your frontend isn't tied to the commerce vendor
• Your backend extensions can live in your own repository
• You aren't forced to pay a GMV percentage simply because your business succeeds

For a team already using Next.js/React/TypeScript, the same language across storefront and commerce backend is also a meaningful operational advantage. ShipGarden

When I'd choose Saleor instead

I'd seriously consider Saleor if your architecture is more API/app-oriented and your team is comfortable with Python and GraphQL.

Saleor is arguably even more explicit about the portability philosophy: its core is open source, self-hostable, GraphQL-only, and designed around APIs, webhooks, apps and metadata rather than a traditional monolithic plugin architecture. Saleor Commerce GitHub

That's an excellent architecture for avoiding coupling:

                    ┌── Web storefront
                    │
                    ├── Mobile app
                    │
                    ├── B2B portal
                    │
                    └── AI/agent commerce
                           │
                           ▼
                    ┌──────────────┐
                    │   Commerce   │
                    │    Engine    │
                    └──────────────┘
                       │    │    │
              ┌────────┘    │    └────────┐
              ▼             ▼             ▼
          PostgreSQL     Payments       Search

The commerce engine becomes one replaceable component, rather than the system around which your entire business is organized.

The bigger issue: platform choice isn't enough

This is the part I'd emphasize to an ecommerce developer:

You can build an extremely locked-in system on an open-source platform.

For example, this architecture is still highly coupled:

Medusa
  ↓
Medusa-specific modules
  ↓
Medusa-specific payment implementation
  ↓
Medusa-specific fulfillment
  ↓
Medusa-specific database assumptions
  ↓
Medusa Cloud

You've technically chosen open source, but migrating could still be painful.

A genuinely portable architecture looks more like:

                 Your domain
                     │
        ┌────────────┴────────────┐
        │                         │
   Commerce API              Your data model
        │                         │
        ▼                         ▼
     Medusa  ◄──────────────► PostgreSQL
        │
   ┌────┼────────┬─────────┐
   ▼    ▼        ▼         ▼
Payment Search  CMS     Fulfillment

Keep your business logic and data model above the platform boundary wherever practical.

My portability checklist

If I were designing for a 10-year lifespan, I'd prioritize these in roughly this order:

1. Can I self-host the core?
2. Can I export all business data in standard formats?
3. Is the license permissive?
4. Can another company operate the software without the original vendor?
5. Are integrations API/webhook based rather than proprietary plugins?
6. Can the frontend be completely independent?
7. Can I replace payments, search, CMS, tax and fulfillment independently?
8. Is the database accessible rather than a black box?
9. Can I run the software on ordinary cloud infrastructure?
10. Is the project's community large enough that I'm not effectively dependent on one company?

On those criteria, Medusa is probably the best overall starting point for a TypeScript developer, with Saleor as my alternative when GraphQL/Python/API-centric architecture is the better fit.

One important nuance: "headless" by itself doesn't mean portable. Shopify Hydrogen, for example, gives you a highly portable frontend while the underlying commerce system remains Shopify's proprietary managed backend. That's excellent for frontend freedom, but not equivalent to owning the commerce infrastructure. Vendure

Bottom line: If your explicit goal is "I want to be able to fire my commerce vendor in five years without rebuilding my business," I'd start with Medusa + PostgreSQL + independently hosted integrations, and make the commerce platform an implementation detail rather than the center of your architecture.

The commerce engine becomes one replaceable component, rather than the system around which your entire business is organized.

The bigger issue: platform choice isn't enough

This is the part I'd emphasize to an ecommerce developer:

You can build an extremely locked-in system on an open-source platform.

For example, this architecture is still highly coupled:

Medusa
  ↓
Medusa-specific modules
  ↓
Medusa-specific payment implementation
  ↓
Medusa-specific fulfillment
  ↓
Medusa-specific database assumptions
  ↓
Medusa Cloud

You've technically chosen open source, but migrating could still be painful.

A genuinely portable architecture looks more like:

                 Your domain
                     │
        ┌────────────┴────────────┐
        │                         │
   Commerce API              Your data model
        │                         │
        ▼                         ▼
     Medusa  ◄──────────────► PostgreSQL
        │
   ┌────┼────────┬─────────┐
   ▼    ▼        ▼         ▼
Payment Search  CMS     Fulfillment

Keep your business logic and data model above the platform boundary wherever practical.

My portability checklist

If I were designing for a 10-year lifespan, I'd prioritize these in roughly this order:

1. Can I self-host the core?
2. Can I export all business data in standard formats?
3. Is the license permissive?
4. Can another company operate the software without the original vendor?
5. Are integrations API/webhook based rather than proprietary plugins?
6. Can the frontend be completely independent?
7. Can I replace payments, search, CMS, tax and fulfillment independently?
8. Is the database accessible rather than a black box?
9. Can I run the software on ordinary cloud infrastructure?
10. Is the project's community large enough that I'm not effectively dependent on one company?

On those criteria, Medusa is probably the best overall starting point for a TypeScript developer, with Saleor as my alternative when GraphQL/Python/API-centric architecture is the better fit.

One important nuance: "headless" by itself doesn't mean portable. Shopify Hydrogen, for example, gives you a highly portable frontend while the underlying commerce system remains Shopify's proprietary managed backend. That's excellent for frontend freedom, but not equivalent to owning the commerce infrastructure.

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d shortlist Medusa, Saleor, and Vendure rather than proprietary SaaS platforms such as Shopify, commercetools, or Salesforce Commerce Cloud.

My pick: Medusa

For most ecommerce developers, Medusa is probably the best default choice if portability is the #1 concern.

Why:

• Open source + MIT license — you can self-host, modify the code, fork it, and move infrastructure without asking the vendor. Vendure Build with Matija
• TypeScript/Node.js — particularly attractive if your storefront is Next.js/React and you want one language across the stack.
• Modular architecture — commerce capabilities can be replaced or extended rather than forcing your entire application around a monolithic platform.
• No mandatory SaaS dependency — the same basic commerce engine can run independently of the vendor's hosted offering.
• Large developer ecosystem relative to the other newer open-source options.

The important distinction is that headless doesn't automatically mean portable. A Shopify headless implementation, for example, gives you a portable frontend, but the underlying commerce engine, data model, checkout, and APIs remain Shopify's proprietary infrastructure. Vendure

How I'd rank the main options

Saleor deserves special attention if your definition of portability is "I want my application code to depend on stable APIs rather than deeply coupling itself to the commerce implementation." Its API-only, GraphQL-first architecture and external-app/webhook model create a particularly clean boundary between your application and the commerce engine. GitHub Saleor Documentation

Vendure is compelling if you're a TypeScript/NestJS shop and need more sophisticated B2B, pricing, channels, and workflow capabilities. Its core is open source and self-hostable, although its licensing model is less permissive than Medusa's or Saleor's. Vendure Developer Hub Vendure

The bigger issue: architecture matters more than platform

If you're serious about avoiding lock-in, I wouldn't just select an open-source platform and assume you're safe.

I'd architect it like this:

                    Your application
                          │
             ┌────────────┴────────────┐
             │                         │
        Your domain              Your storefront
       / business logic          Next.js / React
             │                         │
             └────────────┬────────────┘
                          │
                    Commerce adapter
                          │
              ┌───────────┴───────────┐
              │                       │
           Medusa                  [future]
              │                       │
       ┌──────┼──────┐                │
       │      │      │                │
    Payments Search  Tax          another engine

In other words, don't make Medusa (or Saleor/Vendure) your application's domain model.

Keep your own:

• Product/catalog canonical data where practical
• Customer identity
• Order/domain concepts
• Pricing rules that are business-critical
• Fulfillment abstractions
• Payment-provider abstraction
• Search abstraction
• CMS/content
• Analytics/event model
• Integration layer

Then treat the commerce platform as an implementation of commerce capabilities, rather than the system that defines your entire business.

That's the difference between:

"We're running Medusa."

and:

"We have a commerce system, currently implemented using Medusa."

The second is dramatically easier to migrate.

One subtle advantage of Saleor

If I were building a large, integration-heavy enterprise system, I'd seriously consider Saleor over Medusa despite preferring Medusa for a typical TypeScript team.

Saleor explicitly pushes customization toward APIs, apps, webhooks, metadata, and extensions rather than requiring you to modify the core. Its documentation describes the platform as API-only and its extension model is deliberately designed around external applications. GitHub Saleor Documentation

That can create a stronger architectural boundary:

Your code → API contract → commerce engine

rather than:

Your code → platform internals → database

The former is usually more portable.

My decision rule

I'd choose:

• Medusa → if you're a JS/TypeScript developer and want maximum freedom with minimum friction.
• Saleor → if architectural/API purity and long-term composability are more important than sharing a language with the frontend.
• Vendure → if you're TypeScript-first and have substantial B2B/omnichannel requirements.
• Shopify → if minimizing operational burden is more important than backend portability.
• commercetools → if you're an enterprise with the budget and organizational maturity to accept SaaS dependency in exchange for sophisticated composability.

For your specific criterion—"maximize long-term portability and avoid vendor lock-in"—my default would be Medusa, with Saleor as the strongest alternative.

And regardless of which one you pick, I'd put more effort into owning your data, keeping integrations behind interfaces, avoiding proprietary platform extensions, and making periodic full-data export/rebuilds part of your engineering process than into squeezing another 5% out of the platform feature comparison.

The second is dramatically easier to migrate.

One subtle advantage of Saleor

If I were building a large, integration-heavy enterprise system, I'd seriously consider Saleor over Medusa despite preferring Medusa for a typical TypeScript team.

Saleor explicitly pushes customization toward APIs, apps, webhooks, metadata, and extensions rather than requiring you to modify the core. Its documentation describes the platform as API-only and its extension model is deliberately designed around external applications.

That can create a stronger architectural boundary:

Your code → API contract → commerce engine

rather than:

Your code → platform internals → database

The former is usually more portable.

My decision rule

I'd choose:

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose Medusa—with Saleor as the strongest alternative.

My ranking for portability

Current 2026 comparisons similarly put Medusa, Saleor, and Vendure in the strongest category when code ownership and self-hosting are the priority. Vendure Toolradar

Why I'd pick Medusa

Medusa gives you a particularly good combination of openness and developer portability. It is MIT-licensed, self-hostable, and built around a TypeScript/Node.js ecosystem. That means your developers aren't dependent on a proprietary runtime or SaaS control plane, and you can modify the commerce engine itself if necessary. Vendure Build with Matija

More importantly, I'd evaluate portability at four different layers:

1. Infrastructure portability — Can I run it somewhere other than the vendor's cloud?
2. Data portability — Can I export products, customers, orders, prices, inventory, etc. into ordinary databases/files?
3. Application portability — Can another team understand and replace the platform without rewriting the entire business?
4. Integration portability — Are payments, search, CMS, tax, fulfillment, ERP, and other services behind replaceable interfaces?

Medusa scores particularly well on #1 and #3.

Saleor may actually be better architecturally

If your team is comfortable with Python and GraphQL, I'd seriously consider Saleor instead. Its architecture is unusually attractive for avoiding lock-in: the backend is API-only, extensions are separated through apps/webhooks, and the project explicitly emphasizes open standards and self-hosting. GitHub Saleor Commerce

That separation can make it easier to replace individual pieces without modifying the commerce core.

So my decision would be:

• TypeScript/Node team → Medusa
• Python/GraphQL team → Saleor
• Complex B2B/omnichannel requirements + TypeScript → Vendure
• Large enterprise that doesn't want to operate its own platform → commercetools
• Already deeply invested in Shopify → Shopify/Hydrogen

The bigger point: the platform isn't what determines lock-in

You can make Medusa extremely vendor-locked if you build your application around Medusa-specific internals.

Conversely, you can use a proprietary platform relatively safely if you isolate it behind your own domain model and interfaces.

For maximum portability, I'd structure the system roughly like:

                    Your application
                          │
             ┌────────────┴────────────┐
             │                         │
        Commerce interface        Domain logic
             │                         │
             └────────────┬────────────┘
                          │
                    Medusa adapter
                          │
                    ┌─────┴─────┐
                    │   Medusa  │
                    └───────────┘

And I'd keep your canonical business data and domain concepts independent of Medusa wherever practical.

For example, don't let:

MedusaProduct
MedusaOrder
MedusaCustomer

become your application's fundamental domain objects.

Instead:

Product
Order
Customer
Price
Inventory

and treat Medusa as the current implementation.

Then, if five years from now you decide to move to Saleor, a custom commerce engine, or another platform, you're replacing an adapter rather than rewriting the business.

Bottom line

For a developer-led ecommerce project starting today, I'd choose Medusa for the best overall combination of portability, permissive licensing, TypeScript productivity, and self-hosting.

I'd choose Saleor instead if API-boundary architecture and GraphQL/Python are more important to your team.

And I would not choose Shopify, BigCommerce, or commercetools if avoiding vendor lock-in is genuinely the #1 objective. Their headless APIs give you frontend freedom, but the underlying commerce backend remains vendor-controlled. Vendure

If you tell me your stack (Next.js/Nuxt/etc.), team size, B2C vs B2B, and whether you want to self-host, I can give you a more opinionated Medusa vs Saleor vs Vendure architecture recommendation.

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose an open-source, self-hostable commerce engine rather than a SaaS platform.

My ranking

My default choice: Medusa

For a developer building a new headless store today, Medusa would be my default recommendation if the team is comfortable with TypeScript.

The important thing isn't merely that it's "headless." It's that you can run the actual commerce engine yourself. Medusa is MIT-licensed and built around Node.js/TypeScript, so you're not dependent on a proprietary commerce runtime to keep your business operating. Current comparisons also put Medusa, Saleor and Vendure among the strongest open-source headless options. Vendure Build with Matija

That gives you a useful escape hatch:

Medusa Cloud → your own AWS/GCP/Azure infrastructure → another host → potentially another commerce engine

without having to replace the fundamental commerce backend simply because your vendor changed pricing or product direction.

medusajs.com

But there's an interesting case for Saleor

If I were designing specifically for maximum architectural portability, I'd seriously consider Saleor.

Its architecture is particularly attractive because the commerce API is the boundary: Saleor describes itself as API-only, GraphQL-first and technology-agnostic, with apps, webhooks and API extensions rather than requiring everything to be implemented inside a proprietary plugin architecture. GitHub Saleor Commerce

That means you can build:

                 ┌── Next.js storefront
                 │
                 ├── Mobile app
                 │
                 ├── B2B portal
                 │
                 └── Custom frontend
                         │
                         ▼
                  ┌─────────────┐
                  │   Commerce  │
                  │     API     │
                  └─────────────┘
                         │
              ┌──────────┼──────────┐
              ▼          ▼          ▼
           Payments    Search     ERP

rather than:

Frontend
   │
   ▼
Vendor-specific SDK
   │
   ▼
Vendor-specific plugins
   │
   ▼
Vendor-specific backend

The first architecture is considerably easier to migrate.

saleor.io

The bigger issue: don't confuse "open source" with "portable"

This is the part I'd pay the most attention to.

Even with an open-source platform, you can create massive lock-in by putting your business logic in platform-specific abstractions.

For maximum portability:

• Own your domain model. Don't let the commerce platform become your canonical representation of the business.
• Keep customer/order/product data exportable in conventional formats.
• Put business-critical logic in your own services/modules, rather than deeply coupling it to vendor plugins.
• Treat the commerce platform as an implementation of a Commerce API, not as your application's architecture.
• Keep payments, search, CMS, ERP, tax, email, fulfillment, etc. behind your own interfaces where practical.
• Prefer webhooks/events + APIs over proprietary extension mechanisms.
• Avoid vendor-specific frontend components when a standard HTTP/GraphQL interface will do.
• Infrastructure-as-code everything so the platform can be redeployed elsewhere.
• Maintain automated data export/import tests—not merely backups.
• Make replacing the commerce engine a hypothetical exercise during development.

The goal is essentially:

Your application owns the business → commerce platform supplies commerce capabilities.

Not:

Commerce platform owns the business → your application is a collection of extensions.

What I'd choose for different teams

TypeScript/Next.js developer or small product team:
→ Medusa

Python/GraphQL team, highly API-oriented architecture:
→ Saleor

TypeScript team with substantial B2B/omnichannel requirements:
→ Vendure; just understand its GPLv3/open-core licensing model. Vendure

Large enterprise that doesn't want to operate the infrastructure:
→ commercetools can be a reasonable trade-off, but you're accepting considerably more vendor dependency.

Already deeply invested in Shopify:
→ Shopify + Hydrogen is perfectly rational. But don't choose it because of portability. The commerce backend remains Shopify's proprietary service. Vendure

Bottom line

If you asked me to make the decision specifically on long-term portability, I'd shortlist:

1. Saleor — best architectural separation
2. Medusa — best combination of portability + developer ergonomics
3. Vendure — excellent if its licensing model fits

For a typical modern TypeScript/Next.js ecommerce developer, I'd probably pick Medusa, but I'd architect the application so that replacing Medusa is possible. That's ultimately more important than which headless platform you pick.

If you're optimizing for a 10-year horizon, I'd actually argue that the architecture around the commerce platform matters more than the platform itself. Saleor Commerce Saleor Commerce

saleor.io

The bigger issue: don't confuse "open source" with "portable"

This is the part I'd pay the most attention to.

Even with an open-source platform, you can create massive lock-in by putting your business logic in platform-specific abstractions.

For maximum portability:

• Own your domain model. Don't let the commerce platform become your canonical representation of the business.
• Keep customer/order/product data exportable in conventional formats.
• Put business-critical logic in your own services/modules, rather than deeply coupling it to vendor plugins.
• Treat the commerce platform as an implementation of a Commerce API, not as your application's architecture.
• Keep payments, search, CMS, ERP, tax, email, fulfillment, etc. behind your own interfaces where practical.
• Prefer webhooks/events + APIs over proprietary extension mechanisms.
• Avoid vendor-specific frontend components when a standard HTTP/GraphQL interface will do.
• Infrastructure-as-code everything so the platform can be redeployed elsewhere.
• Maintain automated data export/import tests—not merely backups.
• Make replacing the commerce engine a hypothetical exercise during development.

The goal is essentially:

Your application owns the business → commerce platform supplies commerce capabilities.

Not:

Commerce platform owns the business → your application is a collection of extensions.

What I'd choose for different teams

TypeScript/Next.js developer or small product team:
→ Medusa

Python/GraphQL team, highly API-oriented architecture:
→ Saleor

TypeScript team with substantial B2B/omnichannel requirements:
→ Vendure; just understand its GPLv3/open-core licensing model.

Large enterprise that doesn't want to operate the infrastructure:
→ commercetools can be a reasonable trade-off, but you're accepting considerably more vendor dependency.

If long-term portability and minimal vendor lock-in are the primary criteria, I would choose Medusa for most ecommerce developers, with Saleor as the strongest alternative.

My ranking for portability

Current 2026 comparisons likewise put Medusa, Saleor, and Vendure in the strongest category for developers who specifically want to own and self-host their commerce backend. Vendure Toolradar

Why I'd pick Medusa

Medusa has a particularly attractive combination for a developer:

• MIT license — permissive enough that your business isn't structurally tied to the vendor.
• Self-hostable — you can run the backend on infrastructure you control.
• TypeScript/Node.js — particularly portable for modern web teams.
• Headless from the ground up — your storefront isn't tied to the commerce backend.
• Modular architecture — commerce functionality can be replaced or extended rather than forcing your entire application to conform to a monolith.
• No dependency on a proprietary hosted database/service for the fundamental commerce engine.

The MIT licensing point is particularly important. If your definition of "portability" is "could I fork this project, run it independently, and continue developing it if the company disappeared?", Medusa scores extremely well. Current comparisons identify it as MIT-licensed and self-hostable. Vendure Build with Matija

Saleor is arguably even better architecturally

Saleor deserves serious consideration if you're comfortable with Python/GraphQL.

Its API-only architecture creates a particularly clean boundary: the storefront communicates with commerce through APIs rather than importing commerce-specific frontend machinery. Saleor explicitly describes itself as headless/API-only and technology-agnostic, with open-source code that can be self-hosted. Saleor Commerce GitHub

That makes this architecture very attractive:

                    ┌── Web storefront
                    ├── Mobile app
                    ├── B2B portal
Customers ──────────┤
                    ├── Marketplace
                    └── Future frontend
                           │
                           ▼
                    ┌───────────────┐
                    │ Commerce API  │
                    │   Saleor      │
                    │   or Medusa   │
                    └───────────────┘
                           │
             ┌─────────────┼─────────────┐
             ▼             ▼             ▼
          Postgres      Payments       Search

The crucial thing isn't merely choosing an "open-source" platform. It's keeping the platform behind stable interfaces so that you can replace individual components later.

The bigger point: avoid architectural lock-in

I'd actually worry less about whether you choose Medusa vs. Saleor and more about how you implement it.

For maximum portability:

1. Keep your storefront independent.

Next.js/React, Astro, or another frontend should communicate through APIs rather than importing commerce internals.

2. Keep your business logic outside vendor-specific extensions where practical.

Don't put five years of irreplaceable business rules into proprietary plugins.

3. Own your data.

Make PostgreSQL/database exports, product data, orders, customers, prices, inventory, etc. routinely exportable.

4. Use external services behind your own interfaces.

For example:

PaymentService
SearchService
TaxService
ShippingService
EmailService

rather than having your application directly depend everywhere on one provider's SDK.

5. Prefer standards over proprietary APIs.
6. Containerize the commerce backend.

Being able to deploy the same application to AWS, GCP, Azure, another cloud, or bare metal is a significant portability advantage.

7. Don't confuse "headless" with "portable."

Shopify can be headless, for example, but your commerce backend is still Shopify. Hydrogen gives you frontend freedom, not backend ownership. Vendure

My practical recommendation

If I were starting a new project today and told the team:

"This ecommerce platform needs to survive 10+ years, and we don't want to be forced into a replatform because our vendor changes pricing, direction, or disappears."

I'd shortlist:

🥇 Medusa — best default for a TypeScript/Node team.

🥈 Saleor — potentially better for sophisticated multi-channel/B2B commerce and teams happy with Python + GraphQL.

🥉 Vendure — excellent TypeScript alternative, particularly if its B2B/omnichannel capabilities align closely with the requirements, but I'd examine its GPLv3/open-core model carefully before committing. Vendure

I would not choose Shopify, BigCommerce, or commercetools if avoiding vendor lock-in is genuinely the overriding requirement. They're perfectly reasonable engineering choices when minimizing operational burden is more important than owning the backend.

In one sentence: choose Medusa if you want the best balance of developer ergonomics and freedom; choose Saleor if API purity, GraphQL, and enterprise/multichannel capabilities matter more.

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose Saleor—with Medusa as the strongest alternative, especially if your team is TypeScript-heavy.

My ranking for portability

Why I'd pick Saleor

The important distinction is that "headless" doesn't automatically mean portable. A SaaS headless platform can still lock you into its APIs, pricing, data model, checkout, and operational infrastructure.

Saleor is unusually strong on the dimensions that matter for exit strategy:

• Open source: you can run the actual commerce engine yourself rather than merely consuming a vendor's hosted API.
• API-only architecture: storefront, admin, and integrations interact through APIs rather than platform-specific templates/plugins.
• Technology agnostic: Saleor explicitly designs its extension model around external services, webhooks, and APIs rather than proprietary plugins. GitHub Saleor Commerce
• Self-hosting: you can clone the repository, run the platform locally, and deploy it yourself without requiring Saleor Cloud. Saleor Commerce
• Open-source stack: Saleor's current positioning explicitly emphasizes owning the stack and avoiding proprietary standards/vendor lock-in. Saleor Commerce

That gives you a particularly good "we can leave if we need to" property.

But there's an important caveat

Don't confuse platform portability with application portability.

Even with Saleor, you can create lock-in yourself if your application becomes deeply dependent on:

Your storefront
      ↓
Saleor-specific GraphQL
      ↓
Saleor-specific domain model
      ↓
Saleor-specific checkout
      ↓
Saleor

A much more portable architecture looks like:

                 ┌── Web
                 ├── Mobile
                 ├── B2B portal
                 └── Other channels
                         ↓
                    Your BFF/API
                         ↓
             ┌─────────────────────┐
             │  Commerce adapter   │
             └─────────────────────┘
                    ↓        ↓
                 Saleor     ERP/WMS
                    ↓
              PostgreSQL/data

Put the platform behind your own domain interfaces. For example:

interface Commerce {
  getProduct(id: ProductId): Promise<Product>
  createCart(input: CreateCart): Promise<Cart>
  addItem(cart: CartId, item: LineItem): Promise<Cart>
  priceCart(cart: CartId): Promise<PricedCart>
  placeOrder(cart: CartId): Promise<Order>
}

Your application talks to Commerce; only one adapter knows that the implementation happens to be Saleor.

If you later replace Saleor with Medusa, Vendure, or a custom commerce service, the storefront doesn't have to be rewritten.

Saleor vs. Medusa

This is the decision I'd actually spend time on.

Choose Saleor if:

• portability is the #1 priority;
• you're comfortable with Python/Django and GraphQL;
• you expect sophisticated multi-channel/enterprise commerce;
• you want a strongly API-oriented architecture;
• you want maximum separation between commerce and your application.

Choose Medusa if:

• your team is primarily TypeScript/Node;
• you want the commerce engine to feel more like a programmable framework;
• you expect significant custom business logic;
• developer ergonomics in the JS ecosystem matter more than having Saleor's GraphQL-centric model.

Medusa's architecture is also quite portable: it is open source, self-hostable, and separates API routes, workflows, modules, and the PostgreSQL data layer. Medusa Docs

What about commercetools?

commercetools is arguably the best commercial choice for architectural decoupling. Its APIs and composable model are very good, and its architecture is explicitly designed around independently replaceable commerce capabilities. commercetools commercetools

But there's a fundamental difference:

commercetools minimizes architectural coupling; Saleor/Medusa can minimize vendor coupling.

If commercetools disappeared, changed pricing dramatically, or you wanted to stop paying for it, you still have a migration project. With Saleor, you have the source and can continue operating the engine yourself.

My recommendation

For a developer starting a new system in 2026, I'd use:

Saleor + your own BFF/domain layer + PostgreSQL + independent payment/search/CMS/ERP services.

And I'd enforce one architectural rule:

Never let your business logic become dependent on the commerce vendor's SDK or data model.

If you do that, Saleor is probably the strongest choice for maximizing exit options. If you're a TypeScript shop, I'd seriously consider Medusa instead—the difference in portability is relatively small, while developer productivity could be substantial. OSSAlt

The biggest lock-in risk isn't actually which headless platform you select. It's how much of your application you allow the platform to become.

If long-term portability and minimizing vendor lock-in are the primary goals, I’d choose Medusa for most ecommerce development teams in 2026.

The important distinction is that “headless” by itself does not mean portable. Shopify, BigCommerce, and commercetools can give you a decoupled frontend while leaving the most important part—the commerce engine and data model—proprietary.

My ranking for portability

The three strongest choices are the open-source engines: Medusa, Saleor, and Vendure. Current comparisons similarly identify those three as the leading self-hostable headless options. Vendure OpenReplay Blog

1. Medusa — my default choice

Medusa is particularly attractive because its architecture is modular, TypeScript/Node-based, and MIT licensed. Its server exposes commerce functionality through APIs, with workflows and modules sitting between the API and PostgreSQL datastore. Medusa Documentation

That gives you a particularly good escape route:

Storefront → your integration layer → Medusa → PostgreSQL

rather than:

Storefront → proprietary SaaS → proprietary data model → proprietary APIs

The MIT license is also significant. You're not merely renting an open-source-looking interface—you can actually run and modify the software yourself.

I'd choose Medusa when:

• Your team is TypeScript/JavaScript-heavy.
• You're building with Next.js or another modern JS frontend.
• You want to self-host if necessary.
• You want the option of using managed hosting initially and taking over infrastructure later.
• You want to minimize legal/licensing friction.
• You expect substantial custom commerce logic.

2. Saleor — arguably the strongest architectural choice

Saleor deserves serious consideration.

Saleor is API-only and GraphQL-first, and explicitly positions itself around avoiding technology lock-in. It is open source and self-hostable, with extensions implemented as independently versioned apps rather than requiring everything to live inside the core. GitHub Saleor Commerce

I'd actually choose Saleor over Medusa if your team is already comfortable with Python/Django and you strongly prefer GraphQL.

Its architecture is arguably even more attractive from a composability perspective:

Frontend
↓
GraphQL API
↓
Saleor
↓
Independent apps/services

That makes it easier to keep your business-specific functionality outside the commerce engine.

3. Vendure — excellent TypeScript alternative

Vendure is another very strong option, particularly for a TypeScript/NestJS team. It provides an open-source commerce core with APIs, a dashboard, and a plugin system. Vendure

The major consideration is licensing: Vendure's core uses GPLv3, with commercial licensing available for certain needs. That's not necessarily a problem, but it makes Medusa's MIT license simpler if your overriding objective is maximum freedom.

What I would not optimize for

Don't choose a platform simply because its marketing says “composable,” “API-first,” or “headless.”

For portability, I'd score platforms against these questions:

1. Can I self-host the actual commerce engine?
2. Can I export all my data in ordinary formats?
3. Is the database accessible?
4. Can I replace the search provider?
5. Can I replace the payment provider?
6. Can I replace the CMS?
7. Can I replace the frontend without changing commerce?
8. Can I replace the commerce engine without rewriting the frontend?
9. Can I use the system without paying the vendor indefinitely?
10. Can I fork the code if the company disappears?

On those criteria, open-source/self-hostable platforms have a fundamental advantage over Shopify-style SaaS.

The bigger architectural trick

If you're really trying to maximize portability, I wouldn't make Medusa/Saleor/Vendure the center of your entire application architecture.

Make your own domain model and integration boundaries the center.

For example:

                    ┌── Next.js storefront
                    ├── Mobile app
                    ├── POS
                    └── Marketplace
                           │
                    Your Commerce API
                           │
              ┌────────────┴────────────┐
              │                         │
          Commerce engine          Your services
       (Medusa/Saleor/etc.)     pricing / loyalty /
              │                  subscriptions / etc.
              │
        PostgreSQL

And keep vendor-specific concepts behind adapters:

ProductService
OrderService
CustomerService
PaymentService
SearchService

Then your application talks to your interfaces, not directly to MedusaProduct, ShopifyProduct, etc.

That makes a future migration:

Medusa → Saleor

or

Medusa → custom commerce engine

a substantial engineering project rather than a total rewrite.

My recommendation

For a new project today:

Medusa + PostgreSQL + your own domain/integration layer + Next.js

is probably the best balance of developer productivity, portability, licensing freedom, and long-term control.

If your team is Python/GraphQL-oriented:

Saleor + PostgreSQL + your own domain layer

may be the better choice.

If you're building sophisticated B2B/omnichannel commerce and like NestJS:

Vendure is worth serious consideration.

I would choose Shopify/Hydrogen only if operational simplicity and Shopify's ecosystem are more important than owning the commerce backend. Shopify's headless model still leaves the backend proprietary, so it doesn't satisfy a strict “I need to be able to leave” requirement nearly as well. Vendure

In short: if portability is the #1 requirement, don't just go headless—go self-hostable and open-source. And among the current options, Medusa is my default recommendation, with Saleor as the strongest alternative.

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose Saleor, with Medusa as the strongest alternative.

My ranking

🥇 Saleor — my pick for maximum portability

Saleor is open source, API-only, and designed around a composable architecture. Its core is available for self-hosting, and its API/extensions are deliberately separated from the storefront. It uses GraphQL as its primary API and supports webhooks and external apps rather than requiring you to embed everything in proprietary plugins. saleor.io

That's important because headless does not automatically mean portable.

A Shopify headless implementation, for example, can have a completely independent Next.js frontend while the business remains deeply dependent on Shopify for:

• product/catalog data
• checkout
• orders
• pricing
• promotions
• customer data
• payment infrastructure
• platform APIs

You have decoupled the presentation layer, but not necessarily the commerce layer.

With Saleor, you can self-host the commerce engine and keep your frontend, infrastructure, integrations, and business-specific logic under your control. saleor.io

🥈 Medusa — arguably better for a TypeScript shop

I'd choose Medusa instead if the development team is heavily invested in TypeScript/Node.js.

Its architecture separates API routes, workflows, modules and the data layer, with PostgreSQL commonly used underneath. That makes it attractive when you want to replace or extend individual commerce capabilities rather than treating the platform as an inseparable black box. docs.medusajs.com

The practical distinction I'd make is:

Saleor

"Give me a powerful, standardized commerce API that I can build everything around."

Medusa

"Give me a commerce framework that my TypeScript team can deeply customize."

Both are substantially better choices than a proprietary SaaS platform if escaping the platform later is a serious architectural requirement.

What about commercetools?

commercetools is a very good enterprise option. Its composable architecture is specifically designed around independent commerce components and APIs. commercetools.com

But there's an important distinction:

Composable ≠ open source.

You can reduce architectural coupling to individual components while still being commercially dependent on commercetools. If your definition of portability is "we can replace the platform without rewriting our entire application," it's excellent.

If your definition is "we can take the commerce engine, run it ourselves, and continue operating even if the vendor disappears or changes its pricing," Saleor/Medusa have the stronger story.

The architecture matters more than the platform

If I were designing for a 10+ year lifespan, I'd actually make the platform replaceable rather than simply picking the "least locked-in" platform.

For example:

                    ┌───────────────┐
                    │   Next.js     │
                    │   Storefront  │
                    └───────┬───────┘
                            │
                       Your BFF/API
                            │
          ┌─────────────────┼─────────────────┐
          │                 │                 │
       Commerce          Search            CMS
       (Saleor)        (replaceable)     (replaceable)
          │
     ┌────┴─────┐
     │          │
   ERP/WMS    Payments

The critical trick is not allowing your storefront/domain code to become a thin wrapper around Saleor-specific or Medusa-specific concepts everywhere.

Instead:

Your domain model
       ↓
Your commerce interface
       ↓
Saleor adapter

Then, hypothetically:

Your domain model
       ↓
Your commerce interface
       ↓
Medusa adapter

or:

Your domain model
       ↓
Your commerce interface
       ↓
commercetools adapter

That makes the commerce platform an implementation detail.

My recommendation

If you're an ecommerce developer starting a new project today and saying:

"I care more about being able to leave in 7–10 years than I care about minimizing today's development effort."

I'd pick:

1. Saleor — best overall for maximum ownership + open-source + API-first architecture.
2. Medusa — best if you're a TypeScript/Node developer and want maximum code-level customization.
3. Vendure — particularly attractive for teams already comfortable with NestJS/TypeScript.
4. commercetools — excellent enterprise composability, but still vendor SaaS dependency.
5. Shopify Hydrogen — excellent business choice when operational simplicity matters more than ultimate portability.

The most important architectural decision, though, is to keep your customer/order/product domain model and business rules outside the platform whenever practical. That buys you considerably more portability than switching from one headless SaaS provider to another.

If vendor lock-in is your #1 concern, I would therefore take Saleor + self-hosting + an anti-corruption/domain layer over Shopify, BigCommerce, or a managed composable platform. saleor.iosaleor.io

If long-term portability and minimizing vendor lock-in are the primary goals, I’d choose Saleor—with Medusa as the strongest alternative.

My ranking for portability

Why I would pick Saleor

Saleor has an unusually strong combination for avoiding lock-in:

• The core is open source, so you're not dependent on a proprietary SaaS runtime. You can run the platform yourself. Saleor Commerce Saleor Commerce
• Its architecture is API-only/headless, meaning your storefront isn't tied to a proprietary frontend framework. GitHub
• It uses standard GraphQL rather than requiring a proprietary SDK for core commerce operations.
• Extensions are primarily built through apps, APIs and webhooks, rather than deep proprietary plugins. That creates a useful architectural boundary between your business logic and the commerce engine. Saleor Commerce
• You can run Saleor yourself today and move to Saleor Cloud later—or the other way around—without changing the fundamental commerce model. Saleor Commerce

That last point is important: "headless" by itself doesn't mean portable. A hosted headless SaaS can still lock you into its APIs, pricing, checkout, data model, and extension system.

When I'd choose Medusa instead

Medusa would be my choice if your team is heavily TypeScript/Node.js-oriented.

Medusa is also open source and self-hostable, and its architecture exposes API, workflow, module, and database layers. Its common datastore is PostgreSQL. Medusa Docs

The major difference is architectural philosophy:

• Saleor: Python/Django + GraphQL + strong API boundary
• Medusa: TypeScript/Node + REST + highly moddable application architecture

For a JavaScript-heavy engineering organization, Medusa can therefore be the more practical choice even if Saleor is my slight favorite for architectural portability. Eryx Innovations Lab

The bigger issue: design for portability regardless of platform

If you're serious about avoiding lock-in, the platform matters less than where you put your business logic.

I'd structure the system roughly like:

                    Your application
                          │
              ┌───────────┴───────────┐
              │                       │
        Your domain logic        Your storefront
              │                       │
              └───────────┬───────────┘
                          │
                    Commerce adapter
                          │
             ┌────────────┴────────────┐
             │                         │
          Saleor                    Medusa
             │                         │
        Commerce data             Commerce data

Keep pricing rules, customer segmentation, product enrichment, search, CMS, analytics, fulfillment orchestration, and other differentiated business logic outside the commerce platform whenever practical.

Then your commerce platform becomes replaceable infrastructure rather than the place where your company embeds its institutional knowledge.

I'd also:

• Own your PostgreSQL/data exports where possible.
• Use your own IDs rather than making platform IDs your canonical identifiers.
• Put a thin commerce repository/adapter layer between application code and platform APIs.
• Avoid platform-specific frontend components.
• Treat webhooks/events as integration boundaries.
• Keep search, CMS, payments, tax and fulfillment replaceable where economically sensible.
• Maintain an automated full data export/import test.
• Don't let a vendor's proprietary workflow DSL become your business logic.
• Version your infrastructure and commerce configuration in Git.

Bottom line

For a developer starting a new, serious headless build in 2026:

1. Saleor — my choice if maximum long-term freedom is the priority.
2. Medusa — arguably better if you're a TypeScript-first team and want maximum control with a familiar Node ecosystem.
3. Vendure — worth serious consideration for a TypeScript team wanting an extensible open-source core.
4. commercetools — excellent technically, but you're accepting SaaS dependency in exchange for enterprise-grade composability. Its model is explicitly about interchangeable components, but the platform itself remains a commercial hosted dependency. commercetools
5. Shopify — excellent business decision when speed, ecosystem and operational simplicity outweigh portability.

So if your question is specifically "What platform gives an ecommerce developer the best chance of still being free to leave in 5–10 years?", my answer is Saleor, implemented with a platform-agnostic domain architecture.

If you tell me your stack (Next.js/React, Python, Node, etc.), expected GMV/SKUs, B2B vs B2C, and whether you'd self-host, I can narrow this down to Saleor vs Medusa vs Vendure and show exactly where the lock-in occurs in each.

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose Saleor—with Medusa as the strongest alternative.

My ranking for portability

Why I'd lean Saleor

Saleor's architecture is unusually aligned with the "I don't want to be trapped here in 7 years" requirement.

It is open source and self-hostable, and its backend is API-only. Its integrations are designed around APIs, apps, and webhooks rather than proprietary plugins. Saleor explicitly emphasizes technology agnosticism and open standards. Saleor Commerce Saleor Commerce

That matters because you can structure the system roughly like:

Next.js / React storefront → Saleor → your own payment / search / ERP / OMS / PIM services

rather than:

Your application → proprietary platform → proprietary extensions → proprietary data model

Saleor also lets you run the platform locally and deploy it yourself, so you aren't dependent on its cloud offering to operate the commerce engine. Saleor Commerce

Medusa is arguably better for a TypeScript-heavy developer

I'd pick Medusa instead if your team is predominantly JavaScript/TypeScript.

Medusa's Node.js/TypeScript architecture means you can keep the entire application in the same ecosystem, and its modular approach makes substantial customization straightforward. Current comparisons generally characterize Medusa as the more natural choice for JS/TS teams, while Saleor makes a stronger enterprise/multichannel bet with Python/Django and GraphQL. OSSAlt Eryx Innovations Lab

So my rule of thumb would be:

• TypeScript/Node team → Medusa
• Enterprise/multichannel + GraphQL + strong Python capability → Saleor
• Maximum ecosystem/maturity and you're willing to accept WordPress → WooCommerce
• Don't prioritize portability → Shopify/commercetools can become more attractive

One important caveat

Open source doesn't automatically mean portable.

You can create enormous lock-in on top of an open-source platform through custom code. The real portability strategy is to make the commerce platform replaceable.

I'd therefore design around these principles:

1. Keep your product/customer/order data exportable in ordinary formats.
2. Don't make the storefront depend on platform-specific UI components.
3. Put payments behind your own abstraction.
4. Keep search, CMS, PIM, ERP and fulfillment independently replaceable.
5. Treat the commerce API as an implementation detail, rather than allowing Saleor/Medusa types to permeate your entire codebase.
6. Own your infrastructure and deployment configuration.
7. Regularly test an actual data export/import path.
8. Prefer webhooks and standard APIs over proprietary plugins.

In other words, if you're serious about a 10-year architecture, I'd actually optimize for:

Replaceable commerce engine + owned data + replaceable services + standards-based interfaces

rather than simply asking which platform has the least lock-in.

Bottom line: For a greenfield project where portability is the #1 architectural requirement, Saleor is my first choice today. If you're a TypeScript-first shop and want a more code-centric/modular development experience, Medusa may be the better practical choice. Both are dramatically easier to escape from than a platform where the core commerce system is exclusively SaaS. Saleor Commerce Saleor Commerce

Saleor also lets you run the platform locally and deploy it yourself, so you aren't dependent on its cloud offering to operate the commerce engine. Saleor Commerce

Medusa is arguably better for a TypeScript-heavy developer

I'd pick Medusa instead if your team is predominantly JavaScript/TypeScript.

Medusa's Node.js/TypeScript architecture means you can keep the entire application in the same ecosystem, and its modular approach makes substantial customization straightforward. Current comparisons generally characterize Medusa as the more natural choice for JS/TS teams, while Saleor makes a stronger enterprise/multichannel bet with Python/Django and GraphQL. ossalt.com eryxinnovationslab.com

So my rule of thumb would be:

If your primary goal is long-term portability and minimizing vendor lock-in, I would generally rank choices like this:

1. Medusa — best default choice for most developer-led builds
2. Saleor — strongest for enterprise complexity
3. Vendure — strong if you want a TypeScript-native, modular architecture
4. Shopify / BigCommerce — excellent operationally, weaker for ultimate portability

OSSAlt Vendure## My recommendation: choose an open-source, self-hostable headless platform

For maximum future freedom, optimize for these properties:

• You own the database
• You can run it anywhere (AWS, Azure, bare metal, another cloud)
• The codebase is accessible
• The storefront is not tied to proprietary APIs
• Business logic lives in your code, not platform plugins
• Products, customers, orders, and content can be exported cleanly

That usually points away from pure SaaS platforms and toward open-source commerce engines. Edana

1. Medusa — my pick for most teams

Medusa is probably the best balance of portability, developer experience, and future flexibility today.

Why it fits the portability goal:

• TypeScript/Node.js ecosystem
• Modular architecture
• Self-hostable
• API-first
• Easier for modern frontend teams using React/Next.js
• You can replace pieces (payments, fulfillment, search, CMS) without replacing the whole platform

Hunchbite OSSAltThe main downside: you own more engineering responsibility. Compared with Shopify, you are responsible for upgrades, infrastructure, integrations, and operational maturity.

Choose Medusa if you are building:

• A custom storefront
• A marketplace
• A brand expected to evolve heavily
• A system integrating ERP/PIM/WMS/custom services
• A long-lived product where engineers are the main users

2. Saleor — best when commerce complexity dominates

Saleor is a strong choice for larger organizations.

Strengths:

• GraphQL-first architecture
• Strong multi-channel support
• Good fit for complex catalogs
• Good enterprise-oriented features

WPBundleTrade-offs:

• Python/Django stack
• More infrastructure complexity
• Smaller ecosystem than mainstream SaaS platforms

I would pick Saleor over Medusa if you already have:

• A Python backend team
• Complex B2B pricing
• Multiple warehouses
• Heavy enterprise workflows

3. Vendure — a good TypeScript alternative

Vendure is worth considering if you want a highly extensible Node.js architecture.

It has a plugin-oriented design that can be attractive for developers building a commerce platform rather than just a storefront. Vendure

What I would avoid if portability is the top priority

Shopify as the core backend

Shopify is excellent when you want:

• Fast launch
• Merchant-friendly administration
• Huge app ecosystem
• Minimal operations

But the deeper your business logic depends on Shopify-specific concepts, apps, checkout behavior, and APIs, the harder migration becomes.

A headless Shopify build reduces frontend lock-in, but it does not eliminate backend lock-in.

Building your own commerce engine

This sounds maximally portable, but often creates a different kind of lock-in: your own team becomes the vendor.

Unless commerce is your core product, buying an extensible engine is usually safer.

Architecture matters more than the platform

Even with Medusa/Saleor/Vendure, you can accidentally create lock-in. A portable architecture would look like:

Frontend:
Next.js / React / native apps

        ↓

Commerce API:
Medusa / Saleor / Vendure

        ↓

Independent services:
- Payments
- Search
- CMS
- Email
- Analytics
- ERP
- Inventory

        ↓

Your data:
PostgreSQL + exports + backups

Avoid putting critical business rules only inside:

• Shopify apps
• proprietary plugins
• vendor-specific workflows
• hosted automation tools

Bottom line

If I were starting a new ecommerce platform today and optimizing for 10-year portability, I would choose:

• Small-to-medium developer-led commerce: Medusa
• Enterprise/B2B complexity: Saleor
• TypeScript-heavy custom commerce platform: Vendure
• Fastest launch with less engineering: Shopify (accepting lock-in)

The platform matters, but the biggest long-term portability win is keeping your data model, business rules, and integrations independent from the commerce vendor.

Even with Medusa/Saleor/Vendure, you can accidentally create lock-in. A portable architecture would look like:

Frontend:
Next.js / React / native apps

        ↓

Commerce API:
Medusa / Saleor / Vendure

        ↓

Independent services:
- Payments
- Search
- CMS
- Email
- Analytics
- ERP
- Inventory

        ↓

Your data:
PostgreSQL + exports + backups

Avoid putting critical business rules only inside:

• Shopify apps
• proprietary plugins
• vendor-specific workflows
• hosted automation tools

Bottom line

If I were starting a new ecommerce platform today and optimizing for 10-year portability, I would choose:

• Small-to-medium developer-led commerce: Medusa
• Enterprise/B2B complexity: Saleor
• TypeScript-heavy custom commerce platform: Vendure
• Fastest launch with less engineering: Shopify (accepting lock-in)

The platform matters, but the biggest long-term portability win is keeping your data model, business rules, and integrations independent from the commerce vendor.

If long-term portability and avoiding vendor lock-in are the primary goals, I’d choose Saleor—with Medusa as the strongest alternative if your team is TypeScript/Node-first.

My ranking for portability

Why I'd pick Saleor

The key distinction is where your application's business logic lives.

Saleor is open source and can be run entirely on your own infrastructure. Its architecture is API-only, with GraphQL as the primary interface, and its extension model uses APIs, webhooks, apps, and metadata rather than requiring you to build everything as proprietary platform plugins. Saleor Commerce Saleor Commerce

That gives you a particularly good escape route:

Your code → standard web APIs → commerce engine → PostgreSQL

rather than:

Your code → proprietary SaaS platform → proprietary extensions → proprietary data model

Saleor explicitly supports running the platform locally/self-hosted without requiring its cloud service. Saleor Commerce

That's important because "headless" by itself doesn't mean portable. A SaaS platform can be headless while still locking you into its APIs, data model, checkout, pricing model, extensions, and operational assumptions.

Where Medusa may actually be better

I'd choose Medusa over Saleor if you're primarily a JavaScript/TypeScript developer.

Medusa's architecture is particularly attractive for developers who want to own the application layer: its server is Node/Express-based, with workflows, modules, and a PostgreSQL-backed data layer. Medusa Docs

So if your stack is something like:

Next.js + TypeScript + Node + PostgreSQL

Medusa is arguably the more natural fit.

The practical tradeoff is that Saleor gives you a very strong, deliberately API-centric commerce architecture, while Medusa gives a TypeScript team a very comfortable development environment.

The bigger decision: don't confuse platform portability with application portability

Whichever you choose, I'd architect the application so that the commerce platform is replaceable.

For example:

                    ┌── Web storefront
                    ├── Mobile app
Customers ──────────┤
                    └── B2B portal
                           │
                           ▼
                    Your Commerce BFF
                           │
              ┌────────────┴────────────┐
              ▼                         ▼
        Commerce platform         External services
        (Saleor/Medusa)        Search / CMS / ERP / PSP

Put your own domain layer/BFF between the frontend and commerce engine where it makes sense. Don't scatter Saleor/Medusa-specific calls throughout your entire frontend.

More importantly, don't make the commerce platform your system of record for everything.

I'd keep control of:

• Customer identity
• Product enrichment/content where practical
• Order/business analytics
• Search index
• CMS content
• Integration/event data
• Business-specific workflows
• Infrastructure/configuration as code
• Data exports and backups

Then the commerce engine becomes a replaceable implementation of commerce capabilities rather than your entire application.

My recommendation

If I were starting a new engineering-led ecommerce project today:

Choose Saleor if maximum architectural independence is the #1 criterion.

Choose Medusa if maximum portability + TypeScript developer ergonomics is the combination you're optimizing for.

I'd probably shortlist Saleor and Medusa, build a small proof of concept in each, and make the final choice based on which one lets you keep your own domain logic outside the platform.

I would not choose Shopify/commercetools merely because their APIs are good if "I need to be able to leave this vendor in 5–10 years" is a hard requirement. Their APIs make integration portable, but they don't make the underlying commerce infrastructure yours. Saleor's open-source/self-hostable model provides a materially stronger exit strategy. Saleor Commerce Saleor Commerce

In one sentence: Saleor for maximum freedom; Medusa for maximum freedom with a TypeScript-first developer experience.

That's important because "headless" by itself doesn't mean portable. A SaaS platform can be headless while still locking you into its APIs, data model, checkout, pricing model, extensions, and operational assumptions.

Where Medusa may actually be better

I'd choose Medusa over Saleor if you're primarily a JavaScript/TypeScript developer.

Medusa's architecture is particularly attractive for developers who want to own the application layer: its server is Node/Express-based, with workflows, modules, and a PostgreSQL-backed data layer. Medusa Docs

So if your stack is something like:

Next.js + TypeScript + Node + PostgreSQL

Medusa is arguably the more natural fit.

The practical tradeoff is that Saleor gives you a very strong, deliberately API-centric commerce architecture, while Medusa gives a TypeScript team a very comfortable development environment.

The bigger decision: don't confuse platform portability with application portability

Whichever you choose, I'd architect the application so that the commerce platform is replaceable.

For example:

                    ┌── Web storefront
                    ├── Mobile app
Customers ──────────┤
                    └── B2B portal
                           │
                           ▼
                    Your Commerce BFF
                           │
              ┌────────────┴────────────┐
              ▼                         ▼
        Commerce platform         External services
        (Saleor/Medusa)        Search / CMS / ERP / PSP

Put your own domain layer/BFF between the frontend and commerce engine where it makes sense. Don't scatter Saleor/Medusa-specific calls throughout your entire frontend.

More importantly, don't make the commerce platform your system of record for everything.

I'd keep control of:

• Customer identity
• Product enrichment/content where practical
• Order/business analytics
• Search index
• CMS content
• Integration/event data
• Business-specific workflows
• Infrastructure/configuration as code
• Data exports and backups

Then the commerce engine becomes a replaceable implementation of commerce capabilities rather than your entire application.

My recommendation

If I were starting a new engineering-led ecommerce project today:

Choose Saleor if maximum architectural independence is the #1 criterion.

Choose Medusa if maximum portability + TypeScript developer ergonomics is the combination you're optimizing for.

I'd probably shortlist Saleor and Medusa, build a small proof of concept in each, and make the final choice based on which one lets you keep your own domain logic outside the platform.

I would not choose Shopify/commercetools merely because their APIs are good if "I need to be able to leave this vendor in 5–10 years" is a hard requirement. Their APIs make integration portable, but they don't make the underlying commerce infrastructure yours. Saleor's open-source/self-hostable model provides a materially stronger exit strategy.

If long-term portability and avoiding vendor lock-in are the primary goals, I’d choose Saleor—with Medusa as the strongest alternative if your team is heavily TypeScript-oriented.

My ranking for portability

Saleor's core is explicitly BSD-3-Clause licensed, and its architecture is API-only: the backend is interacted with and extended through APIs rather than proprietary storefront/plugin mechanisms. It can also be run locally/self-hosted rather than requiring Saleor Cloud. github.com

That's a particularly good combination for portability. If you eventually abandon Saleor, you're not trying to extract your business logic from a SaaS black box; your storefront, integrations, and much of your domain logic can remain independent of the commerce engine.

Why I wouldn't automatically pick Medusa

Medusa is arguably the better choice for a TypeScript/Node.js developer. Its core is MIT licensed and its commerce modules are open source, so it has exceptionally little licensing friction. github.com

I'd pick Medusa over Saleor when:

• the entire engineering organization is TypeScript/Node;
• you want to customize commerce primitives extensively;
• you prefer a modular framework rather than a GraphQL-centric commerce API;
• minimizing the number of languages in the backend matters more than having Saleor's API architecture.

The MIT license is also arguably the most permissive licensing position of the candidates.

The more important decision, though

The platform matters less than how you architect around it.

If portability is your #1 requirement, I'd structure the system approximately like:

                    Your storefront
                 Next.js / React / etc.
                         │
                         ▼
                 Your commerce BFF
                  / application API
                         │
              ┌──────────┴──────────┐
              ▼                     ▼
          Saleor/Medusa        Your services
              │               ┌──────────────┐
              ▼               │ ERP          │
          PostgreSQL          │ PIM          │
                              │ CRM          │
                              │ Search       │
                              │ Payments     │
                              └──────────────┘

In particular, don't make your frontend or business services depend directly on platform-specific concepts everywhere.

Instead:

• keep your own domain types/interfaces;
• isolate the commerce platform behind an adapter;
• own your customer/order/product data exports;
• use platform-neutral payment, search, CMS, tax and fulfillment services where practical;
• keep business-critical workflows in your own code;
• treat the commerce engine as an implementation detail;
• avoid platform-specific plugins for logic you might someday need to migrate.

That can make a move from Saleor → Medusa, or Medusa → something else, dramatically less painful.

One subtle reason I favor Saleor

Saleor specifically emphasizes technology-agnostic, API-only architecture, with external apps, webhooks and extensions rather than requiring your business logic to live inside platform-specific plugins. github.comgithub.com

That's exactly the architectural characteristic I'd optimize for if I were making a 10-year platform decision.

Vendure is also compelling technically, particularly for TypeScript teams, but its core is GPLv3 with a separate commercial license option, so I'd put it behind Saleor/Medusa when maximum long-term freedom is the criterion. github.com

Bottom line:

• Maximum architectural portability: Saleor
• Maximum portability + TypeScript/Node: Medusa
• TypeScript + sophisticated B2B: Vendure
• Enterprise SaaS/composable without wanting to operate the backend: commercetools
• Don't prioritize lock-in: Shopify

If I were starting a greenfield project today specifically with the goal of "I want to still be able to replace this platform in 7–10 years," I'd shortlist Saleor and Medusa and spend more time designing the platform boundary than comparing their feature lists.

If your primary objective is long-term portability and minimizing vendor lock-in, I’d choose Medusa for most JavaScript/TypeScript-centric teams, with Saleor as the strongest alternative if your team is comfortable with Python/GraphQL.

My ranking for portability

Why I'd pick Medusa

Medusa is particularly attractive for a developer because you're not merely getting a headless API—you can actually own and run the commerce backend yourself. Its core is open source and MIT-licensed, and it's built around Node.js/TypeScript. GitHub Vendure

That matters because your architecture can look like:

Your storefront → your API layer → Medusa → PostgreSQL / your infrastructure

rather than:

Your storefront → vendor's proprietary commerce infrastructure

If Medusa disappeared tomorrow, you could theoretically fork the codebase, continue running it, or migrate its domain concepts to another system. That's a much stronger exit position than a proprietary SaaS platform.

Saleor is arguably even cleaner architecturally

Saleor deserves serious consideration. It's API-only and GraphQL-first, with the project explicitly designed around avoiding monolithic/plugin architecture and technology lock-in. Its core is BSD-3-Clause licensed and can be self-hosted. GitHub GitHub

I'd choose Saleor over Medusa if:

• your team is already strong in Python/Django;
• you prefer GraphQL;
• you're building sophisticated multi-channel/B2B commerce;
• you want a very strongly API-centric architecture.

I'd choose Medusa if you're primarily a TypeScript/React/Node developer, particularly if you want maximum freedom to customize the commerce domain model.

The bigger point: platform choice isn't enough

The biggest source of lock-in often isn't the commerce engine. It's what developers build around it.

For maximum portability, I'd architect the system so that:

• Product/order/customer data lives in portable databases, not only vendor-specific abstractions.
• Payments go through an abstraction layer rather than being deeply coupled to one PSP.
• Search is replaceable.
• CMS is replaceable.
• Tax/shipping providers are behind interfaces.
• Your storefront talks to your own domain/API layer, rather than directly embedding platform-specific calls everywhere.
• Commerce events use standard webhooks/events.
• Business logic lives in your application rather than proprietary platform extensions.
• Infrastructure is containerized and reproducible.
• You periodically test a fresh self-hosted deployment from backups.

That last point is important: "open source" doesn't automatically mean "portable." A project can be open source while your implementation becomes deeply coupled to its APIs, data model, extensions, and ecosystem.

My practical recommendation

If I were starting a new project today specifically with your criterion:

Medusa + PostgreSQL + TypeScript + your own domain/service layer + independently hosted storefront

would be my default.

I'd use Saleor instead if GraphQL/Python is a better fit for the team.

And I would not choose Shopify, commercetools, or another proprietary SaaS platform solely because its API is headless if vendor exit is a major architectural requirement. Headless removes the frontend coupling; it doesn't remove the vendor dependency. Current comparisons likewise distinguish the self-hostable open-source platforms from proprietary SaaS options. Vendure

In one sentence: choose the platform whose code you can legally run, modify, fork, and host yourself—and make your application depend on commerce interfaces rather than the platform's proprietary abstractions.

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose Saleor or Medusa, with a slight edge to Saleor for maximum architectural portability and Medusa for maximum developer/practical portability.

My ranking

Why Saleor gets the nod: its architecture deliberately keeps the commerce engine behind a technology-agnostic GraphQL API. Saleor explicitly supports self-hosting, external apps, webhooks, and extensions rather than requiring platform-specific plugins. saleor.iogithub.com

That matters enormously if you're thinking 5–10 years ahead. Your storefront can be React/Next.js today, something completely different later, and integrations can live outside the commerce engine. You can also run the open-source engine yourself rather than being dependent on Saleor Cloud. saleor.io

But Medusa is arguably the better choice for many developers

Medusa is particularly attractive if you're a TypeScript/Node developer. Its MIT license is extremely permissive, and its modular Node architecture makes it straightforward to customize and self-host. Current comparisons also put it among the strongest open-source alternatives specifically because you can own the underlying application rather than merely consuming a SaaS API. vendure.io

The important distinction is:

• Saleor: maximize API and architectural portability.
• Medusa: maximize codebase/licensing/developer portability.

The bigger issue: don't confuse "open source" with "portable"

Even with an open-source platform, you can create substantial lock-in by building your application around its proprietary concepts.

For maximum portability, I'd structure the project like this:

                    Your storefront(s)
                           │
                    Your BFF / API layer
                           │
              ┌────────────┴────────────┐
              │                         │
        Commerce engine          Your domain services
        (Saleor/Medusa)          pricing / loyalty /
              │                   search / CMS / etc.
              │
       PostgreSQL + storage

The key is not letting the commerce platform become your application's domain model.

For example, instead of:

Frontend → Saleor-specific API → everything

prefer:

Frontend → Your commerce interface → Saleor
                                      ↓
                                  adapters

Then define your own interfaces for things such as:

• Product
• Variant
• Cart
• Customer
• Order
• Payment
• Inventory
• Pricing
• Promotions

Your implementation can initially call Saleor. If five years later you move to Medusa, Sylius, a custom engine, or another system, you're replacing an adapter rather than rewriting the storefront and business logic.

One particularly important rule

Don't put critical business logic into platform-specific plugins/extensions unless there's a compelling reason.

Put it in your own services/packages and have the commerce engine invoke them through APIs/webhooks.

Saleor is particularly well suited to this model: its architecture emphasizes external apps, webhooks and API extensions rather than a monolithic plugin architecture. saleor.iogithub.com

What I'd choose

If I were starting a new ecommerce project today:

Choose Saleor if:

• portability is the #1 architectural requirement
• you're comfortable with Python/GraphQL
• you expect multiple channels/markets
• you want the commerce backend to be relatively interchangeable
• you're willing to operate a somewhat more sophisticated system

Choose Medusa if:

• your team is primarily TypeScript/Node
• developer productivity matters heavily
• you want a permissive MIT license
• you want to self-host without commercial licensing concerns
• you want a more natural fit with a Next.js ecosystem

I'd choose Medusa for a typical developer-led project, but Saleor for an organization explicitly optimizing for long-term architectural independence.

And I would not choose Shopify, commercetools, or another proprietary SaaS as the core if avoiding vendor lock-in is genuinely the overriding requirement. Their APIs can make migration easier, but you're still ultimately dependent on the vendor's runtime, pricing, feature availability, and commercial terms.

Bottom line:

Saleor is my pick for maximum long-term portability; Medusa is my pick for the best balance of portability and developer ergonomics.

The most important decision, however, isn't actually Saleor vs. Medusa—it's designing your application so that either one can eventually be replaced without replacing your business logic and storefront.

If your primary goal is long-term portability and minimizing vendor lock-in, I would generally favor an open-source, self-hostable headless commerce platform over a proprietary SaaS headless platform. The biggest lock-in risks usually come from:

• proprietary data models
• proprietary APIs
• inability to export complete commerce state
• hosted-only infrastructure
• vendor-specific extensions
• revenue-based pricing changes

Among current options, my shortlist would be:

Vendure## My default recommendation: Medusa for most modern ecommerce developers

For a developer starting a new headless build today, I would usually choose Medusa.

Reasons:

• Open source and self-hostable — you can run the commerce engine yourself rather than depending entirely on a hosted vendor.
• TypeScript-native — pairs naturally with Next.js, React, Node.js, and modern frontend stacks.
• Modular architecture — payments, fulfillment, inventory, pricing, and other areas can be replaced or extended.
• Easier future migration — your business logic can live in your codebase rather than inside a SaaS configuration layer. Build with Matija Grafen

A future migration path could look like:

Medusa backend
      |
      |-- PostgreSQL data
      |-- Custom APIs
      |-- Custom integrations
      |
      v
New commerce engine / custom services

rather than:

Vendor SaaS backend
      |
      |-- proprietary data model
      |-- proprietary workflows
      |-- proprietary extensions
      |
      v
expensive rewrite

When I would choose Saleor instead

Pick Saleor if:

• your team prefers Python/Django
• GraphQL is a core architectural requirement
• you have sophisticated catalog, channel, or B2B requirements
• you want a very API-centric commerce backend

Saleor explicitly positions itself around open-source ownership and avoiding lock-in. Saleor Commerce

When I would choose Vendure

Pick Vendure if:

• your team is already deep in TypeScript/NestJS
• you want a more opinionated commerce framework
• you need strong plugin architecture

It is a strong engineering choice, though I would evaluate ecosystem size and licensing implications carefully. Vendure

Platforms I would avoid if portability is the top priority

Shopify headless

Shopify is excellent operationally, but headless Shopify is still Shopify as your commerce brain. You own the storefront; Shopify owns the core commerce system.

Good choice when:

• speed matters
• standard ecommerce workflows are enough
• the business values ecosystem over control

Less ideal when:

• you want freedom to replace the backend later

Vendure### Enterprise composable SaaS platforms

Platforms such as commercetools can be architecturally clean, but they still introduce vendor dependency through hosted APIs, pricing, and proprietary operating models. They are often chosen for scale and governance rather than maximum independence. Vendure

Architecture choices that matter more than the platform

Even with an open-source platform, you can accidentally create lock-in. To maximize portability:

1. Own your data model

• Keep product, customer, order, and inventory data exportable.
• Avoid burying business rules inside vendor plugins.
• Use standard infrastructure

• PostgreSQL
• object storage
• queues
• standard APIs
• Separate commerce from business logic

• Put loyalty, subscriptions, pricing rules, and customer-specific workflows in your own services where practical.
• Avoid frontend coupling

• Build against APIs, not vendor-specific UI frameworks.
• Maintain migration scripts

• A platform is only portable if you can actually extract and recreate your data.

Bottom line

For a developer optimizing for 10-year flexibility:

1. 🥇 Medusa — best general choice for modern TypeScript commerce teams
2. 🥈 Saleor — best for GraphQL/Python-heavy or complex commerce environments
3. 🥉 Vendure — best for structured TypeScript/NestJS teams
4. commercetools — choose for enterprise capability, not avoiding vendor dependency
5. Shopify headless — choose for business velocity, not maximum portability

The most portable commerce platform is usually the one that leaves you owning your data, your business logic, and your deployment model.

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose Saleor—with Medusa as the strongest alternative.

My ranking for portability

Why I'd pick Saleor

Saleor is unusually well aligned with the specific goal you're describing. Its core is open source and can be run locally or self-hosted, while its commerce API is GraphQL-native and its architecture is explicitly designed to be technology-agnostic. saleor.io

That matters because headless doesn't automatically mean portable. A Shopify storefront can be completely decoupled from the frontend while the business remains heavily dependent on Shopify for catalog, checkout, orders, pricing, etc. Shopify itself describes headless as decoupling the frontend from the backend—but the backend can still be a vendor dependency. www.shopify.com

Saleor gives you a much cleaner escape hatch:

Your frontend → API/BFF → Saleor → your integrations

rather than:

Your frontend → vendor-specific commerce platform → vendor-specific ecosystem

Saleor also supports apps/webhooks rather than requiring everything to be implemented through platform-specific plugins, which makes integrations easier to replace independently. saleor.iosaleor.io

Medusa is extremely compelling too

I'd choose Medusa instead if your team is strongly TypeScript/Node.js-oriented.

Medusa is open source, self-hostable, and has a modular architecture. Its Store API is standard REST/OpenAPI, which can be attractive if you want a relatively conventional web-services architecture. docs.medusajs.com

The practical distinction I'd make is:

• Saleor → better if you want an enterprise-grade, API-first commerce platform and sophisticated multi-channel commerce.
• Medusa → better if you want a highly customizable commerce engine that feels natural to a TypeScript team.

What I would not optimize for

I wouldn't equate "headless" with "no lock-in."

For example, Shopify's Storefront API is framework-agnostic, so you can absolutely build the frontend with Next.js, Remix, etc. www.shopify.com But you're still relying on Shopify for the underlying commerce capabilities.

Similarly, commercetools has a very strong composable architecture and explicitly emphasizes avoiding vendor lock-in. commercetools.com But its SaaS nature means you're still dependent on a proprietary commerce service.

So I'd distinguish:

Frontend portability
→ Shopify/BigCommerce/etc. can do this well.

Commerce-backend portability
→ Saleor/Medusa/self-hosted open source wins.

The architecture matters more than the platform

If I were building for a 10+ year lifespan, I'd go one step further and avoid making any commerce platform the system of record for everything.

I'd structure it roughly as:

                 ┌── CMS
                 ├── Search
Frontend ── BFF ─┼── Payments
                 ├── Tax
                 ├── Shipping
                 └── Commerce engine
                        │
                     Saleor

Then establish your own canonical models/interfaces around:

• Products
• Customers
• Orders
• Payments
• Inventory
• Pricing
• Promotions

The BFF/integration layer becomes the anti-corruption layer between your application and Saleor.

That way, replacing Saleor with Medusa, commercetools, or something that doesn't exist yet becomes an integration project rather than a rewrite of your storefront and business applications.

Bottom line: If you told me "I'm an ecommerce developer, and five years from now I want the freedom to move away from my commerce vendor," I'd start with Saleor, seriously evaluate Medusa, and architect the application so that neither becomes indispensable. saleor.iosaleor.io

If your primary goal is maximum long-term portability and minimizing vendor lock-in, I would generally choose an open-source, API-first, self-hostable headless commerce platform rather than a SaaS headless platform. The strongest candidates today are Medusa, Saleor, and Vendure. ossalt.com

My ranking for portability:

ossalt.com

My default recommendation: Medusa

For a developer starting a new ecommerce build today, I would lean toward Medusa if the team is comfortable with TypeScript/Node.js. It gives you:

• Ownership of the commerce backend code
• Ability to self-host anywhere
• A familiar modern web stack
• Modular services you can replace over time
• Less dependence on a proprietary commerce API

www.wpbundle.com

A typical low-lock-in architecture would look like:

Frontend:
Next.js / React / Remix

Commerce:
Medusa

Database:
PostgreSQL

CMS:
Portable headless CMS (Contentful, Sanity, Strapi, Directus, etc.)

Search:
Algolia / Elasticsearch / OpenSearch

Payments:
Stripe / Adyen / Braintree

Infrastructure:
AWS / GCP / Azure / your own Kubernetes

The important part is not just the commerce platform. It is avoiding coupling your business logic to it.

The real lock-in traps to avoid

Even with an open-source platform, you can accidentally create lock-in by:

1. Putting business logic in proprietary extensions

Bad:

Shopify App
   ↓
Custom pricing logic
   ↓
Vendor-specific APIs

Better:

Your commerce service
   ↓
Platform adapter
   ↓
Commerce backend

Your pricing rules, promotions, customer segmentation, and fulfillment logic should live in your domain layer whenever possible.

2. Making the frontend depend on platform-specific APIs

Avoid:

shopify.checkout.create(...)

Prefer:

commerce.checkout.create(...)

Then your storefront talks to your own abstraction layer.

3. Treating the commerce database as untouchable

Long-term portability improves if you can export:

• Products
• Variants
• Customers
• Orders
• Inventory
• Promotions
• Pricing rules
• Tax configuration

in standard formats.

When I would choose something else

Choose Saleor if:

• You have a Python team
• You need complex B2B, multi-channel, or multi-region commerce
• You prefer GraphQL everywhere

Saleor is designed around an API-only, headless approach and emphasizes avoiding monolithic architecture. github.com

Choose Shopify headless if:

• Your priority is speed to market
• Your commerce workflows are mostly standard
• Your team does not want to operate infrastructure

You accept some lock-in in exchange for operational simplicity.

Choose commercetools if:

• You are an enterprise with many teams
• You need composable commerce at very large scale
• You can tolerate a commercial platform dependency

The "10-year architecture" answer

If I were building an ecommerce platform expected to last a decade, I would optimize for:

1. Open-source commerce engine
2. Portable database
3. Own customer/product/order data model
4. API boundary between storefront and commerce
5. Minimal custom code inside the commerce vendor
6. Replaceable payment, search, CMS, and fulfillment providers

For most engineering teams, that points to:

Medusa + PostgreSQL + Next.js + headless CMS + your own domain services.

It is not necessarily the fastest first launch, but it gives you the strongest chance of still controlling your stack years later. www.wpbundle.com

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose Medusa—with Vendure as the strongest alternative if your requirements are enterprise/B2B-heavy.

My ranking for portability

Why Medusa gets my vote: its architecture is unusually favorable to an engineer who wants to retain control. Its commerce modules are open source, available as npm packages, and can even be used independently in a Node application rather than requiring you to adopt the entire Medusa platform. github.com

That gives you an important escape hatch: your business logic doesn't necessarily have to become inseparable from Medusa.

Medusa vs. Saleor

Medusa is particularly attractive if you're a JavaScript/TypeScript shop. Its modular architecture lets you replace or extend commerce domains without turning the whole application into a proprietary platform dependency. Its MIT licensing is also unusually permissive for this category. github.com

Saleor may actually be the better choice if API purity and architectural separation matter more than staying in TypeScript. Saleor is API-only/headless, open source, and explicitly designed around avoiding technology lock-in. github.com

I'd pick Saleor over Medusa when the team is already strong in Python/Django and expects sophisticated multi-channel commerce.

Where Vendure fits

Vendure is compelling for a TypeScript/NestJS team, particularly for B2B. It uses conventional SQL databases and standard Node.js infrastructure, so you're not dependent on a proprietary database or runtime. It can also be self-hosted or moved to Vendure Cloud without fundamentally changing the application. vendure.io

The caveat is licensing: Vendure's core is GPLv3, while some advanced capabilities are commercial. That's something I'd examine carefully if your strategy is specifically "I want to be able to fork this and own it indefinitely." vendure.io

The bigger point: platform choice isn't enough

If portability is genuinely the goal, I'd architect the system so that the commerce platform is replaceable.

For example:

                    Your application
                          │
             ┌────────────┴────────────┐
             │                         │
        Domain logic              Storefront
             │                         │
             ▼                         ▼
      Commerce adapter          Next.js / etc.
             │
      ┌──────┴──────┐
      │             │
   Medusa       Future platform

Keep these things outside the platform whenever practical:

• Customer/business domain logic
• Product enrichment/PIM data
• CMS/content
• Search
• Analytics/event pipeline
• Email/SMS
• Tax abstraction
• Payment-provider abstraction
• ERP integration
• Warehouse/fulfillment integration
• Customer identity
• Your canonical product/customer/order data where feasible

Then treat Medusa as a commerce engine, rather than making your entire application "a Medusa application."

My recommendation

For a new project in 2026:

TypeScript/Node team → Medusa

Python/Django team → Saleor

TypeScript/NestJS + serious B2B requirements → Vendure

Maximum portability regardless of convenience → Medusa or Saleor, self-hosted, with your own domain layer and data ownership.

I would not choose Shopify, Salesforce Commerce Cloud, or a similar proprietary SaaS if "minimize vendor lock-in" is genuinely the top architectural requirement. Headless APIs reduce frontend lock-in, but they don't eliminate dependence on the commerce vendor itself.

The key distinction is: headless ≠ portable. Open source + standard infrastructure + owned data + replaceable integrations = portable.

If your primary goal is long-term portability and minimizing vendor lock-in, I would generally prioritize open-source, self-hostable, API-first commerce engines over proprietary SaaS headless platforms. The best choice depends on your engineering stack and business complexity, but the shortlist looks like this: vendure.io

vendure.io

My default recommendation for a developer optimizing for portability

Choose Medusa if your team is JavaScript/TypeScript-first. vendure.io

Why:

• You can self-host it rather than depending on a SaaS provider.
• The backend is replaceable because your storefront talks through APIs.
• The codebase is familiar to modern web developers (Node.js + TypeScript).
• Its modular approach makes it easier to swap parts of the commerce stack as requirements evolve. contracollective.comsaleor.iovendure.io

A portable architecture would look something like:

Frontend:
Next.js / React / mobile apps

        ↓ API

Commerce:
Medusa / Saleor / Vendure

        ↓

Services you control:
PostgreSQL
Search engine
CMS
Payments
ERP
Inventory
Cloud hosting

The key is not just picking an open-source commerce engine — it is avoiding coupling your business logic to it.

If you want the strongest "escape hatch"

I would rank them:

1. Medusa

• Best overall portability for most developer teams.
• MIT-licensed and designed for customization.
• Strong choice if you expect to build custom workflows. vendure.io

2. Saleor

• Excellent if your team likes Python and GraphQL.
• Very API-centric and designed around headless usage.
• Strong for multi-region, complex catalogs, and larger operations. saleor.io

3. Vendure

• Excellent TypeScript architecture.
• Particularly attractive for B2B commerce and teams that value a structured plugin model. contracollective.comsaleor.iovendure.io

Platforms I would avoid if lock-in is your top concern

Shopify headless

• Great product and ecosystem.
• But headless does not mean portable: your catalog, checkout rules, customer data model, promotions, and operations still live inside Shopify.

Salesforce Commerce Cloud / other enterprise SaaS

• Powerful, but migration away is usually a major replatforming effort.

The bigger portability checklist

Whatever platform you choose, design around:

1. Your own data model
   • Keep product, customer, order, and inventory exports clean.
   • Do not let vendor-specific IDs become your primary identifiers.

2. Independent integrations
   • Use your own integration layer for ERP, CRM, fulfillment, tax, search, and analytics.

3. Portable frontend
   • Keep the storefront independent from commerce APIs where possible.

4. Open infrastructure
   • Prefer PostgreSQL, standard queues, standard object storage, and containerized deployments.

5. Avoid proprietary extensions
   • A platform that requires vendor-only plugins creates hidden lock-in.

If I were starting a new ecommerce build in 2026 with a skilled engineering team and a 5–10 year horizon, I would usually pick Medusa + Next.js + PostgreSQL + a separate CMS/PIM layer unless the business requirements pointed strongly toward Saleor or Vendure. contracollective.comsaleor.iovendure.io

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose an open-source, self-hostable commerce engine rather than a proprietary SaaS headless platform.

My ranking

The 2026 landscape still puts Medusa, Saleor and Vendure in the strongest position for teams that actually want to own the commerce backend. vendure.iogithub.com

🥇 My default choice: Medusa

For an ecommerce developer starting a new project, I'd lean toward Medusa.

Its biggest portability advantage isn't simply that it's open source. It's that its architecture separates HTTP/API, workflows, domain modules and persistence. The modules can be extended or replaced, and the typical datastore is PostgreSQL. docs.medusajs.com

That gives you a useful escape strategy:

Storefront → your API/BFF → Medusa → PostgreSQL

rather than:

Storefront → proprietary SaaS → proprietary data model → proprietary extensions

Medusa is also MIT-licensed, which is particularly attractive for long-lived commercial projects: you aren't dependent on purchasing a commercial license to continue running the core software. vendure.io

The major caveat is that Medusa is relatively young and has had significant architectural evolution—the v1→v2 migration was substantial. So I'd pin versions carefully and avoid making your application overly dependent on Medusa-specific abstractions. vendure.io

🥈 Saleor if API purity matters most

I'd seriously consider Saleor instead if you're comfortable with Python/Django and particularly value an API-centric architecture.

Saleor is BSD-licensed, self-hostable, GraphQL-only, and explicitly designed so that the API is the way clients interact with the backend. Its extension model uses APIs, webhooks and apps rather than requiring you to fork the core. vendure.iogithub.com

That's excellent for portability because your storefront isn't tightly coupled to the implementation language of the commerce engine.

Its own documentation makes the philosophy particularly clear: the platform is designed to be technology-agnostic and work with essentially any frontend/BFF stack. saleor.io

I'd choose Saleor over Medusa when:

• GraphQL is a deliberate architectural choice.
• You have strong Python expertise.
• You need sophisticated multi-channel/multi-warehouse commerce.
• You want extensions to live outside the core.

🥉 Vendure is the interesting TypeScript alternative

Vendure deserves consideration if you're a TypeScript/NestJS shop. Its core is TypeScript/NestJS, exposes GraphQL, and uses a plugin architecture intended to let you customize the system without forking it. github.com

The important portability distinction is licensing: Vendure's core is GPLv3/open source while some advanced enterprise functionality is commercial. Medusa's MIT license is therefore the cleaner choice if maximum licensing independence is your objective. vendure.io

The bigger point: the platform matters less than your architecture

Even with Medusa/Saleor/Vendure, you can create enormous lock-in if you build your application around platform-specific APIs.

For maximum portability, I'd architect it like this:

                 ┌───────────────┐
Web / Mobile ───►│ Your BFF/API  │
                 └───────┬───────┘
                         │
              ┌──────────▼──────────┐
              │ Commerce Application │
              │                      │
              │ Products             │
              │ Cart                 │
              │ Orders               │
              │ Customers            │
              │ Pricing              │
              └──────────┬───────────┘
                         │
                    ┌────▼────┐
                    │ Medusa  │
                    └────┬────┘
                         │
                    PostgreSQL

And make these your interfaces, rather than letting the commerce platform's API become your application's domain model:

• Product
• Variant
• Price
• Customer
• Cart
• Order
• Fulfillment
• Payment
• Inventory

Then keep platform-specific code in an adapter layer:

CommerceService
     │
     ├── MedusaAdapter
     ├── SaleorAdapter
     └── FutureCommerceAdapter

That way, replacing Medusa isn't a rewrite of your storefront, business logic and integrations. It's primarily an implementation migration.

One more important rule

Own your data independently.

Even if Medusa uses PostgreSQL, don't assume that "we can access the database" automatically means you're portable. Keep:

• regular database exports
• product/catalog exports
• customer/order exports
• images/assets in portable object storage
• payment data represented through your own IDs rather than vendor-specific assumptions
• search indexes rebuildable from canonical data
• integrations behind your own interfaces

And don't make the commerce platform your CMS, search engine, tax engine, payment abstraction, or workflow engine unless there's a compelling reason.

Bottom line

If you told me:

"I'm a developer building a greenfield ecommerce system in 2026. I want the freedom to move infrastructure, hosting provider, frontend framework, and eventually even commerce engines."

I'd pick Medusa + PostgreSQL, with a thin application-owned API/domain layer around it.

If you're Python/GraphQL-first, I'd pick Saleor.

If you're deeply invested in NestJS/TypeScript and want a very structured commerce framework, I'd investigate Vendure.

I would not pick Shopify, Salesforce Commerce Cloud, or another proprietary SaaS backend if avoiding vendor lock-in is explicitly the top objective. A headless frontend doesn't eliminate backend lock-in—the proprietary commerce backend is still where your catalog, orders, pricing and business rules live. vendure.io

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose Vendure or Saleor, with Vendure as my default recommendation for a TypeScript-heavy ecommerce developer.

My ranking for portability

🥇 Vendure — my choice for a developer prioritizing exit options

Vendure is particularly attractive because the actual application can live on infrastructure you control. It uses Node.js/NestJS, TypeScript, GraphQL and conventional SQL databases; Vendure explicitly supports PostgreSQL, MySQL and MariaDB and deployment on AWS, Azure, GCP, Kubernetes, Docker, on-prem, etc. vendure.io

That's important because portability isn't just "the API is good." You want to be able to take:

• your database
• your commerce code
• your plugins
• your deployment artifacts
• your integrations
• your storefront

…and move them without asking the vendor's permission.

Vendure's architecture is unusually good on that dimension. Its Shop API is standard GraphQL over HTTP, so the storefront isn't tied to a proprietary frontend SDK either. docs.vendure.io

🥈 Saleor — arguably the strongest API/composable choice

Saleor is an excellent alternative, particularly if your team likes Python/Django and GraphQL.

Saleor is open source, API-only/headless and designed around extensions, webhooks and apps rather than modifying a monolithic core. Its documentation explicitly emphasizes technology-agnostic architecture and avoiding platform lock-in. github.comvendure.io

I'd pick Saleor over Vendure if:

• your team is primarily Python rather than TypeScript;
• you need sophisticated multi-channel/global commerce;
• GraphQL is central to your architecture;
• you want the commerce backend to behave more like a composable service than an application framework.

🥉 Medusa — excellent pragmatic option

Medusa is probably the option I'd investigate first for a modern JS/TS agency or product team. It's open source, MIT-licensed, Node/TypeScript-based and modular. Current comparisons put it alongside Vendure and Saleor as the leading open-source headless options. vendure.iodocs.vendure.iogithub.comcontracollective.com

Its main advantage is developer ergonomics and modularity. The tradeoff is that, if absolute long-term architectural portability is the overriding goal, I'd give Vendure a slight edge because of its particularly conventional infrastructure/runtime model.

The bigger point: platform choice isn't enough

You can take a supposedly "portable" open-source platform and still create enormous lock-in.

For maximum portability, I'd structure the system like this:

Storefront → Commerce API → domain/integration layer → external services

And keep these things replaceable:

• Payments: Stripe/Adyen/etc. behind your own payment interface
• Search: Algolia/Elastic/OpenSearch behind a search interface
• CMS: separate CMS
• PIM: separate PIM
• Tax: separate tax service
• Shipping: separate carrier/rating abstraction
• Email: separate provider
• Analytics: separate event pipeline
• Identity: standards-based authentication
• Media: S3-compatible object storage
• Infrastructure: Docker/Kubernetes/ordinary cloud primitives

Most importantly, don't make your business logic depend directly on the commerce platform's proprietary abstractions.

For example, instead of:

Your application
       ↓
Vendure-specific order logic
       ↓
Vendure

aim for:

Your application/domain model
       ↓
Commerce adapter
       ↓
Vendure

Then replacing Vendure with Saleor, Medusa, or even a custom commerce service becomes an engineering project rather than a company-wide rewrite.

My actual recommendation

If I were starting a new ecommerce project today and told you:

"I care more about being able to leave in 7–10 years than I care about minimizing development effort today."

I'd choose:

TypeScript team → Vendure

Python/GraphQL team → Saleor

JS/TS team wanting maximum developer velocity → Medusa

And I'd avoid making Shopify or commercetools the system of record if vendor independence is genuinely the top requirement. They can still be useful components of a broader architecture, but they're fundamentally different from owning the commerce engine yourself.

The key principle is: choose the platform that is easiest to replace, not merely the platform with the best API today. Open source + self-hosting + standard infrastructure + clean domain boundaries is the strongest combination for that. github.comvendure.io

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose an open-source, self-hostable headless platform rather than a SaaS-first platform.

My default choice: Medusa

For most ecommerce developers, Medusa is probably the best balance.

Why:

• TypeScript/Node.js — a huge advantage if your team already lives in the JS/TS ecosystem.
• Open source and self-hostable — you can run the commerce backend on infrastructure you control rather than depending on a proprietary runtime.
• Modular architecture — commerce domains can be extended/replaced rather than forcing your business logic into a monolithic platform.
• API-first/headless — your storefront, mobile apps, CMS, search, ERP, etc. can remain independently replaceable.
• You can use managed hosting while retaining the option to move away later. contracollective.com

The important distinction is that "headless" by itself doesn't prevent lock-in. A proprietary headless SaaS can still lock you into its APIs, data model, pricing and operational infrastructure. Open source + self-hosting gives you a much stronger escape hatch.

The shortlist

Vendure is particularly interesting if portability is paramount: it explicitly supports first-class self-hosting and lets you move between self-hosted and its cloud offering without changing the underlying application architecture. vendure.io

Saleor is another strong choice. Its API-only architecture, open-source core, GraphQL API, and self-hosting model make it unusually clean from a portability perspective. github.com

But here's the bigger architectural point

If I were designing for 10+ year portability, I wouldn't just pick an open-source platform and call it done. I'd deliberately make the commerce platform replaceable.

I'd structure it roughly as:

Storefront → Commerce API → Commerce engine → PostgreSQL

with independent:

• CMS
• PIM
• search
• payments
• tax
• shipping
• ERP/OMS
• analytics
• object storage

And I'd ensure that your business's canonical data and business rules aren't trapped inside proprietary extensions.

In particular, avoid building your application around:

Shopify API → Shopify-specific objects → Shopify-specific apps → Shopify-specific workflows

Instead, have your application own its domain concepts and use the commerce engine as an implementation underneath them.

My recommendation by scenario

TS/Node developer building a new DTC store:
→ Medusa

TS/NestJS developer, especially B2B:
→ Vendure

Python/Django team or complex multi-channel catalog:
→ Saleor

Large enterprise that doesn't want to operate infrastructure:
→ commercetools, accepting the greater vendor dependency

Fastest route to a conventional store where portability isn't a major concern:
→ Shopify

So if you gave me one requirement — "maximize long-term portability" — I'd start with Medusa, Vendure, and Saleor, and would favor **Medusa for a typical TypeScript-based engineering organization. The three are currently among the leading open-source headless options. contracollective.com

The more important thing than the winner, though, is keeping your storefront and business domain decoupled from whichever commerce engine you select. That is what turns a future migration from a rewrite into a backend replacement.

If long-term portability and minimizing vendor lock-in are the primary criteria, I’d choose Saleor or Medusa, rather than a SaaS-first platform such as Shopify or commercetools.

My ranking for portability

My pick: Saleor

For a developer starting a serious greenfield headless implementation, Saleor would be my default choice if the team is comfortable with Python/GraphQL.

Its important advantage isn't merely that it's open source. Its architecture actively minimizes coupling: Saleor is API-only, headless, extensible through apps/webhooks, and designed to work with technologies outside its own stack. The project explicitly positions itself as technology-agnostic and without platform lock-in. github.com

Even better, you can run the actual platform yourself rather than merely consuming a vendor's hosted API. Saleor's current documentation provides a self-hosted deployment path, while its managed Cloud offering gives you an operational escape hatch without taking away the open-source core. saleor.io

Medusa is probably the better choice if you're a TypeScript/Node developer. Its architecture is particularly attractive for developers who want commerce capabilities to be modular and replaceable, and it can likewise be self-hosted. hunchbite.com

The bigger architectural point

The platform matters less than what you allow your application to depend on.

If portability is the goal, I'd build:

Next.js/React storefront → your own commerce abstraction → Saleor/Medusa → PostgreSQL

and keep these outside the commerce platform wherever practical:

• CMS — separate
• Search — separate
• Payments — separate
• Tax — separate
• Shipping/rates — separate
• Customer identity — separate
• Analytics — separate
• Email/SMS — separate
• Media/assets — separate

Most importantly, don't let your storefront become littered with platform-specific calls such as saleor.whatever() or shopify.whatever(). Put those behind your own domain/service interfaces.

That way, replacing Saleor with Medusa—or even a commercial platform later—is mostly an adapter/data-migration problem, rather than rewriting the storefront and business logic.

Why I wouldn't automatically choose commercetools

commercetools is arguably one of the best architecturally designed commercial options. Its API-first/MACH approach is explicitly intended to make commerce technology-agnostic and composable. commercetools.com

But there's an important distinction:

Composable ≠ vendor-independent.

You can replace your frontend, CMS, search engine, PIM, etc., while still being dependent on commercetools for the commerce engine itself. It's a proprietary SaaS service. So I'd choose it for enterprise scale and operational convenience, not maximum ownership.

The rule I'd use

If I were advising an ecommerce developer:

• Maximum ownership/portability: Saleor
• Maximum ownership + TypeScript ecosystem: Medusa
• TypeScript + highly structured plugin architecture: Vendure
• Maximum ecosystem/maturity: WooCommerce
• Enterprise composable SaaS: commercetools
• Fastest route to a sophisticated hosted ecosystem: Shopify

So, if you told me “I want to build this once and still have control over the technology 10 years from now,” I'd lean Saleor—with Medusa a very close alternative for a TypeScript-first team.

The key is not just picking an open-source platform; it's designing your implementation so that the platform is replaceable. saleor.io

If long-term portability and minimizing vendor lock-in are the primary criteria, my first choice for an ecommerce developer in 2026 would be Medusa.

My ranking for portability

Why I'd pick Medusa

The important distinction is headless ≠ portable. A headless Shopify implementation is still heavily dependent on Shopify's backend. If Shopify changes pricing, APIs, checkout capabilities, or platform policies, you're still tied to Shopify.

Medusa is different. Its core is MIT licensed, and its commerce modules are open source. github.com Its architecture uses Node/TypeScript and PostgreSQL, with APIs sitting above modular commerce logic and the database. docs.medusajs.com

That gives you several escape hatches:

• Self-host the backend rather than depending on a vendor's infrastructure.
• Run it on AWS, GCP, Azure, bare metal, etc.
• Keep your storefront completely separate.
• Replace individual commerce integrations/modules rather than rebuilding the entire application.
• Keep your data in a conventional relational database.
• Fork or modify the platform if the upstream project ever becomes commercially unattractive.
• Move to another Node/TypeScript commerce system without also having to replace your entire frontend.

The MIT license is particularly attractive for long-term risk management because it doesn't impose the copyleft obligations associated with GPL. Medusa's current repository explicitly identifies itself as MIT licensed. github.com

Saleor is the strongest alternative

I'd seriously consider Saleor if your team is comfortable with Python/Django and you prefer a GraphQL-first architecture.

Saleor is explicitly open source and self-hostable, with an API-only/headless architecture and PostgreSQL-backed deployment. github.comsaleor.io Its API-first design and extensive webhooks make it particularly good for keeping business logic outside the commerce engine. saleor.io

In fact, Saleor may be my choice over Medusa for a large, international, highly complex commerce operation. Medusa gets my nod for a typical engineering-led team because its TypeScript/Node ecosystem and MIT licensing make it an especially comfortable foundation for a developer who wants maximum control.

What about Vendure?

Vendure is technically excellent and deserves to be on the shortlist. It's TypeScript/NestJS/GraphQL, has a strong plugin architecture, and explicitly supports self-hosting. github.com

The catch is licensing: the current Community Edition is GPLv3, while commercial distributions use Vendure's commercial license. github.com That's not necessarily a problem, but if your definition of "portability" includes maximum freedom to fork, modify, redistribute, and commercially repackage the platform, Medusa's MIT license is considerably cleaner.

The bigger architectural decision

If you're optimizing specifically for 10-year portability, I'd design the system like this:

Next.js / React storefront
↓
Your own BFF / commerce abstraction layer
↓
Medusa
↓
PostgreSQL

And keep these outside Medusa wherever practical:

• CMS
• search
• payments
• tax
• shipping/rates
• email
• analytics
• customer identity
• promotions/business-specific logic

The key is that your application should depend on your own domain interfaces, not directly on Medusa's domain model everywhere.

For example, don't scatter:

MedusaProduct
MedusaOrder
MedusaCustomer

through your entire codebase.

Instead, define your own:

Product
Order
Customer

and make Medusa an implementation behind those interfaces.

Then migrating from Medusa → Saleor, Vendure, commercetools, or even a custom commerce backend becomes an adapter/reimplementation project rather than a rewrite of the entire ecommerce application.

Bottom line

For a developer starting a new project today:

Medusa if maximum practical portability is the #1 goal.
Saleor if you want a more enterprise-oriented, GraphQL-first platform and have Python expertise.
Vendure if you strongly prefer its architecture/plugin system and GPL/commercial licensing isn't an issue.

I would not choose Shopify, BigCommerce, or commercetools solely on the promise of "headless" portability. Their APIs can make the frontend portable, but the commerce engine remains a vendor dependency.

The most important lock-in isn't actually the storefront—it's your commerce domain model, data, integrations, and business logic. Designing those to be platform-independent matters more than which headless backend you select.

If long-term portability and minimizing vendor lock-in are the top priorities, I’d choose Saleor—with Medusa as the strongest alternative.

My ranking for portability

Why Saleor gets my vote: its core is open source and self-hostable, and its architecture is explicitly API-first/headless. You can run the platform yourself rather than depending on Saleor Cloud, while its APIs, webhooks, and extension model let you keep the storefront and integrations separate from the commerce engine. github.com

That matters because "headless" by itself doesn't eliminate lock-in. A SaaS platform can give you a beautifully decoupled frontend while still making your business dependent on its proprietary backend, pricing, APIs, and data model.

Saleor vs. Medusa

I'd make the decision this way:

Choose Saleor if:

• You want maximum architectural independence.
• Your team is comfortable with Python/Django and GraphQL.
• You expect complex multi-channel/multi-region commerce.
• You want the commerce backend to be a relatively independent service.
• You want the option to self-host indefinitely.

Saleor explicitly describes itself as technology-agnostic and API-only, with no monolithic plugin architecture. github.com

Choose Medusa if:

• Your team is primarily TypeScript/Node.js.
• You want to own and heavily customize the commerce engine.
• You prefer a more conventional JavaScript ecosystem.
• Developer familiarity is more valuable to you than Saleor's GraphQL-centric architecture.

Medusa is MIT-licensed and open source, which is a particularly strong property for portability. github.com

The more important architectural decision

If portability is genuinely the goal, don't make your commerce platform the center of your architecture.

I'd structure the system roughly like:

                    ┌── Web storefront
                    ├── Mobile app
Customer channels ──┼── Marketplace
                    └── In-store / POS
                           │
                           ▼
                    Your Commerce API
                           │
              ┌────────────┼────────────┐
              ▼            ▼            ▼
           Catalog       Cart/       Orders
                        Checkout
              │            │            │
              └────────────┼────────────┘
                           ▼
                    Commerce engine
                    (Saleor/Medusa)
                           │
       ┌───────────┬───────┼────────┬──────────┐
       ▼           ▼       ▼        ▼          ▼
    Payments     Search   PIM      CMS       ERP

In other words, make Saleor/Medusa replaceable rather than making it your application's domain model.

For example, don't scatter:

saleor.products.get(...)
saleor.checkout.create(...)
saleor.orders.update(...)

throughout your application. Put an internal abstraction in front of it:

commerce.products.get(...)
commerce.checkout.create(...)
commerce.orders.update(...)

Then implement that interface against Saleor today. If five years from now you move to Medusa, commercetools, or a custom service, the rest of your application doesn't need to know.

One surprising alternative

If you're a large enterprise, I'd seriously consider commercetools despite it not being open source. Its API-first, cloud-native, composable architecture is specifically designed around replaceable services and decoupled commerce capabilities. commercetools.com

But there's an important distinction:

commercetools gives you architectural portability; Saleor/Medusa give you architectural portability plus software ownership.

For your stated objective, I value the latter more.

My recommendation

For a developer starting a new project today:

1. Saleor — best overall for maximum long-term independence
2. Medusa — best if you're a TypeScript/Node shop
3. Vendure — excellent TypeScript alternative
4. commercetools — best enterprise SaaS/composable option
5. Shopify — choose it when ecosystem/merchant convenience outweighs portability

And regardless of platform, I'd insist on owning your product/order/customer data, using your own domain model, avoiding platform-specific frontend components, keeping integrations behind adapters, and maintaining an exportable data pipeline.

That's ultimately much more important for avoiding lock-in than whether the platform calls itself "headless" or "composable." commercetools.com

If your primary goal is long-term portability and minimizing vendor lock-in, I would generally choose an open-source, API-first commerce engine over a proprietary SaaS headless platform. The best choice depends on your team and business complexity, but the shortlist is:

1. Medusa — best default choice for many modern ecommerce developers
2. Saleor — best for enterprise catalogs, GraphQL-first teams, and Python shops
3. Vendure — best for TypeScript teams needing strong plugin architecture
4. commercetools / Elastic Path — strong enterprise options, but less portable because they remain vendor-controlled services

contracollective.comvendure.io

My recommendation: Medusa for maximum developer portability

For a developer building a commerce stack intended to survive 5–10 years, I would lean toward Medusa because it aligns well with the "own your architecture" philosophy:

Why it scores highly for avoiding lock-in:

• Open-source core: you can self-host, fork, inspect, and modify the platform.
• TypeScript/Node.js stack: easier for many modern frontend/full-stack teams to maintain.
• Composable modules: commerce domains (products, orders, inventory, payments, fulfillment) are designed to be extended or replaced.
• Headless by design: your storefront is already separated from the backend.
• Database ownership: your product, order, and customer data live in infrastructure you control. contracollective.com

The biggest portability advantage is architectural: your frontend is not tied to the commerce vendor. A Next.js storefront, mobile app, search layer, CMS, and ERP integrations can outlive the commerce engine.

When I would choose Saleor instead

Choose Saleor if you have:

• Large catalogs
• Multi-region commerce
• Complex pricing/channel requirements
• A Python/Django engineering team
• A preference for GraphQL as the primary commerce interface

Saleor has a strong API-first model and emphasizes open-source ownership and avoiding proprietary lock-in. saleor.io

When I would choose Vendure instead

Choose Vendure if:

• Your team is deeply TypeScript-oriented
• You like NestJS-style architecture
• You need a very extensible plugin system
• You have B2B requirements (quotes, organizations, custom workflows)

Vendure is attractive because it keeps the entire stack in TypeScript and exposes a strongly typed commerce model. contracollective.comvendure.io

Platforms I would be cautious about for portability

Shopify headless

Shopify with Hydrogen is excellent if you want speed, reliability, and ecosystem support. But the backend remains Shopify's proprietary system. You can replace your frontend, but you cannot truly own the commerce engine. contracollective.comvendure.io

Salesforce Commerce Cloud / Adobe Commerce Cloud

Great for large enterprises, but they increase dependency on vendor-specific tooling, contracts, and implementation ecosystems.

commercetools

Technically very composable, but you are still building on a hosted proprietary commerce API. It reduces monolithic lock-in but does not eliminate vendor dependency.

The most portable architecture is actually this

A commerce platform choice matters less than the surrounding architecture:

Frontend
 └── Next.js / React Native / native apps

Commerce engine
 └── Medusa / Saleor / Vendure

CMS
 └── Strapi / Contentful / Sanity

Search
 └── Elasticsearch / Algolia / OpenSearch

Payments
 └── Stripe / Adyen / other gateway abstraction

ERP / OMS
 └── Separate integration layer

Data
 └── Your PostgreSQL + analytics warehouse

The mistake that creates lock-in is allowing the commerce platform to become the system of record for everything.

My ranking for a new build focused on portability

contracollective.comvendure.io

If I were starting a greenfield ecommerce platform today and my top constraint was "I want to still control this architecture in 2036", I would pick Medusa + Next.js + independent CMS/search/payment services, while keeping the commerce API boundary clean enough that replacing Medusa later is realistic.