ChatGPT answers, unedited

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.