ChatGPT answers, unedited

If your core requirement is connecting to many third-party supplier marketplaces (supplier catalogs, dropship networks, wholesalers, distributors, marketplaces, inventory feeds, order routing), the “broadest integrations” answer depends on whether you mean number of apps/connectors or enterprise-grade supply-chain connectivity.

A practical shortlist:

Shopify Shopify## For a supplier-marketplace-heavy model, I would usually evaluate these patterns

1. Shopify Plus + integration layer

A common approach is:

• Shopify Plus = storefront, checkout, customer experience
• Middleware/iPaaS = supplier connections
• ERP/PIM/OMS = operational backbone

Good middleware options include:

• celigo.com
• mulesoft.com
• boomi.com
• channelengine.com

This works well when you may add dozens or hundreds of suppliers over time.

2. Adobe Commerce for complex supplier rules

Choose this when you need things like:

• supplier-specific pricing
• multiple warehouses
• complex inventory allocation
• custom checkout rules
• marketplace-style seller/vendor logic

Adobe Commerce emphasizes extensibility and enterprise integrations, including connectors to systems such as ERP, CRM, and order-management platforms. Adobe for Business

3. BigCommerce for B2B + marketplace connectivity

BigCommerce is often considered when you need:

• B2B catalogs
• customer-specific pricing
• multiple storefronts
• marketplace/channel integrations

It reports more than 1,200 native integrations across commerce functions. BigCommerce

My recommendation framework

If your supplier universe looks like:

• 10–50 suppliers, mostly standard feeds/API connections → Shopify Plus or BigCommerce
• 50–500+ suppliers, many formats, constant onboarding → Shopify Plus + middleware, or Adobe Commerce
• You are building an Amazon-like marketplace with vendor portals → Adobe Commerce, Spryker, Mirakl-based architecture, or custom composable commerce
• Very large enterprise with ERP as the center of gravity → Adobe Commerce, SAP Commerce, Salesforce Commerce Cloud, or composable platforms

The key question is less “which ecommerce platform has the most integrations?” and more:

Are your suppliers already supported by connectors, or do you need to ingest arbitrary supplier feeds/APIs/EDI files?

If you tell me:

1. number of suppliers,
2. supplier types (dropship, wholesale, manufacturers, marketplaces),
3. whether suppliers provide API/EDI/CSV feeds, and
4. expected SKU count,

I can narrow this to the best architecture.

If your main requirement is connecting to lots of third-party supplier marketplaces, I’d separate “broadest integrations” into two things: the ecommerce platform itself, and the supplier/multichannel middleware sitting between it and suppliers.

Based on the current integration ecosystems, the main contenders are:

If supplier marketplaces are the core requirement

Shopify is probably the first platform I'd investigate. Its App Store currently has hundreds of apps just in the sourcing/dropshipping category, including apps that synchronize supplier catalogs, inventory, orders and fulfillment. Shopify App Store Shopify App Store

apps.shopify.com

However, if you're talking about dozens or hundreds of suppliers, I'd seriously consider an architecture like:

Shopify / BigCommerce / Adobe Commerce → integration hub → supplier marketplaces

rather than building a separate direct integration for every supplier.

Adobe Commerce is particularly strong if you expect unusual supplier APIs or complicated catalog/order transformations: it has REST/GraphQL APIs, webhooks, App Builder and API Mesh specifically designed for connecting third-party systems. Adobe says its ecosystem includes “thousands of integrations and extensions.” Adobe Developer Adobe for Business

BigCommerce is also unusually integration-friendly: its Channels Toolkit is explicitly designed for connecting external marketplaces, while its APIs support integrations with ERP, order management, accounting, shipping and fulfillment systems. BigCommerce BigCommerce

My practical shortlist

If you tell me which supplier marketplaces you need to connect to (e.g. Faire, Alibaba, Ankorstore, Amazon, eBay, Walmart, Spocket, Syncee, etc.), I can make a supplier-by-supplier integration matrix for Shopify vs BigCommerce vs Adobe Commerce and identify which one gives you the fewest custom integrations.

If by “supplier marketplaces” you mean platforms where you source products from third-party suppliers/wholesalers/dropshippers and need automated catalog, inventory, pricing, orders, and fulfillment syncing, I’d put Shopify at the top for breadth and ease of integration.

My shortlist

Why Shopify: its app ecosystem is enormous, and its sourcing/dropshipping category alone currently lists roughly 590 apps in the U.S. Shopify App Store Shopify App Store Shopify also has marketplace connectors for Amazon, eBay, Walmart, Target Plus and others, while third-party apps extend this substantially. Shopify

Why BigCommerce may actually be better for your use case: its architecture is explicitly designed around external channels. Its Channels Toolkit lets third parties build integrations to virtually any external sales channel, including marketplaces, and BigCommerce exposes APIs/webhooks for custom integrations. BigCommerce BigCommerce It also has direct integrations with Amazon, Walmart, eBay, Target+, Mercado Libre, etc. BigCommerce

Adobe Commerce is particularly strong if you're talking about lots of unusual suppliers and custom enterprise systems. Adobe says its ecosystem has thousands of extensions, and its marketplace includes connectors such as ChannelEngine, which itself connects an Adobe Commerce store to hundreds of marketplaces/channels. Adobe for Business Adobe Commerce Marketplace

My recommendation

If I were selecting the platform specifically around “we don't know which supplier marketplaces we'll need to connect to in the future”, I'd choose:

1. Shopify — easiest path to the widest ecosystem
2. BigCommerce — strongest alternative if integrations/API flexibility are central
3. Adobe Commerce — best if you're enterprise-scale and have developers/integration resources
4. WooCommerce — extremely flexible, but more dependent on assembling and maintaining plugins

The important distinction is that the ecommerce platform itself isn't necessarily what gives you the supplier integrations. Often you'll use an integration layer such as a marketplace connector/aggregator, which can connect dozens or hundreds of suppliers to your commerce platform.

If you tell me which supplier marketplaces you need to connect (e.g. Faire, Alibaba, Spocket, Syncee, DSers, Wholesale2B, Mirakl marketplaces, etc.), I can make a platform-by-platform matrix showing exactly which ones connect natively, through apps, through middleware, or require custom API work.

If by “third-party supplier marketplaces” you mean platforms where you can source products from many independent suppliers—wholesale marketplaces, dropship networks, manufacturer catalogs, etc.—then Shopify is probably the strongest choice for breadth of integrations.

The important distinction is that there are two kinds of breadth:

• Native/official supplier integrations: Shopify has a very large app ecosystem. Its App Store currently lists roughly 590 dropshipping apps and 480+ sourcing/wholesale apps, including Faire, Alibaba/AliExpress, Spocket, Syncee, Zendrop, CJdropshipping, Printful, Printify and others. Shopify App Store Shopify App Store
• General marketplace/channel integrations: Shopify also has apps for connecting Amazon, eBay, Walmart, Target Plus, TikTok Shop and other channels. Shopify

My shortlist

I'd start with Shopify unless your supplier integrations have unusual technical requirements.

However, there's an important caveat: the ecommerce platform itself isn't necessarily what determines supplier connectivity. For a business with lots of suppliers, I'd actually evaluate the combination of:

Ecommerce platform + supplier integration layer + marketplace/EDI connector

For example, Shopify + an integration platform can be substantially more flexible than relying on Shopify apps individually.

If you give me 5–10 of the supplier marketplaces you need to connect (e.g. Faire, Alibaba, Spocket, Syncee, NuOrder, JOOR, Mirakl, Shopify Collective, etc.), I can compare Shopify vs BigCommerce vs Adobe Commerce specifically against those suppliers and tell you which has the broadest actual coverage rather than just the biggest app store.

If by “third-party supplier marketplaces” you mean platforms like Faire, Mirakl-powered marketplaces, dropship suppliers, wholesale networks, and other external product/catalog sources, I would not choose an ecommerce platform based on its native app count alone. The integration layer matters more.

My shortlist

If breadth is the #1 criterion

I'd look particularly hard at BigCommerce + ChannelEngine or Shopify + Mirakl Connect/another integration hub.

The reason is that a middleware layer can turn one ecommerce platform into a gateway to hundreds of marketplaces rather than requiring a custom integration for each supplier.

For example, ChannelEngine says it supports 100+ direct marketplace/channel connections and 300+ additional marketplaces through the Mirakl network. It also has integrations for Shopify, BigCommerce and Adobe Commerce. Linnworks ChannelEngine

Mirakl Connect is particularly interesting for your use case: it advertises hundreds of marketplace channels and prebuilt connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce. Mirakl

And Mirakl itself has connectors into major commerce platforms including Shopify, Adobe Commerce, SAP Commerce, Salesforce Commerce and BigCommerce. Mirakl Developer Portal Mirakl

Shopify

Shopify probably has the broadest general-purpose ecosystem. For example, Faire has a dedicated Shopify integration that synchronizes catalog, inventory, pricing and orders. Shopify Help Center Faire

The advantage is the sheer number of apps/connectors available. The disadvantage is that once you have dozens or hundreds of suppliers, relying on individual Shopify apps can become an integration-management problem.

BigCommerce

I'd give BigCommerce a serious look if this is a B2B/wholesale/supplier-heavy business.

Its combination with ChannelEngine is compelling: ChannelEngine explicitly supports BigCommerce and says the combination can connect to 950+ marketplaces and online sales channels. ChannelEngine

That's a very different proposition from simply asking, “How many apps does the ecommerce platform have?”

Adobe Commerce

If you have complex product data, multiple suppliers, sophisticated pricing, large catalogs, or enterprise requirements, Adobe Commerce is arguably the most technically capable option.

Its Mirakl integration is especially relevant: Mirakl provides an official Adobe Commerce connector that supports third-party product/catalog synchronization, inventory, pricing, orders, multiple sellers and mixed carts. Mirakl Developer Portal

Adobe also has a large extension ecosystem through its Commerce Marketplace. Experience League

The architecture I'd recommend

If your requirement is essentially:

“We want to source products from lots of external supplier marketplaces and bring their catalogs, prices, inventory and orders into our ecommerce operation.”

I'd evaluate these two architectures first:

Option A — easiest/faster

Shopify → Mirakl Connect / ChannelEngine → supplier & marketplace network

Option B — more enterprise

BigCommerce → ChannelEngine/Mirakl → supplier & marketplace network

And if you're expecting very large catalogs, complex business rules, multiple storefronts, B2B pricing, supplier-specific fulfillment, or heavy customization:

Adobe Commerce → Mirakl → supplier marketplace ecosystem

The important distinction is that Shopify probably wins the “number of apps” contest, while BigCommerce/Adobe + a marketplace integration platform may be substantially better for a business whose core problem is managing many external suppliers.

If you tell me which supplier marketplaces you need to connect to (e.g. Faire, Ankorstore, Mirakl marketplaces, Alibaba, Spocket, Syncee, individual distributors, etc.), I can build a side-by-side matrix of Shopify vs BigCommerce vs Adobe Commerce and check which one has a native/ready-made connector for each supplier.

If your main requirement is integrating with many third-party supplier marketplaces, dropship suppliers, distributors, and external catalogs, the “broadest integrations” answer depends on whether you mean number of connectors or ability to build/maintain complex supplier integrations.

A practical ranking:

Shopify Shopify## My shortlist for a supplier-marketplace-heavy business

1. Shopify Plus — best if you need the widest ready-made ecosystem

shopify.com has probably the broadest marketplace of prebuilt connectors, apps, and agencies. It is commonly used with:

• supplier marketplaces
• dropshipping networks
• fulfillment providers
• inventory sync tools
• ERP systems
• PIM systems
• marketplace channels

The downside: very complex supplier logic (custom pricing rules, vendor routing, multi-supplier fulfillment, unusual inventory rules) may require middleware or custom development. Shopify Shopify

2. Adobe Commerce (Magento) — best if suppliers are complicated

business.adobe.com is often chosen by companies that need:

• hundreds of supplier feeds
• complex product catalogs
• custom pricing
• marketplace-style workflows
• deep ERP/PIM integration

It is less “plug-and-play” than Shopify but more customizable. Adobe highlights extensive extensibility and third-party system integration capabilities. Adobe for Business

3. WooCommerce — best if you want unlimited customization

woocommerce.com has a huge ecosystem because it sits on WordPress. It can connect to almost anything, but you usually need developers or integration platforms to keep supplier feeds reliable.

4. BigCommerce — strong middle ground

bigcommerce.com is attractive for B2B distributors because it has strong APIs and native commerce capabilities. It advertises 1,000+ integrations covering commerce, ERP, CMS, shipping, and business applications. BigCommerce BigCommerce

For your use case, I would evaluate the integration layer as much as the ecommerce platform

If you are connecting to dozens or hundreds of suppliers, the ecommerce platform alone usually is not enough. Look at pairing it with:

• Celigo — commerce/ERP integration automation
• Patchworks — ecommerce integration middleware
• ChannelEngine — marketplace management
• Feedonomics — product feed and channel management

A common architecture is:

Supplier marketplaces → Integration middleware → ERP/PIM → Ecommerce platform → Customer channels

rather than:

Supplier marketplaces → Ecommerce platform directly

My recommendation by scenario

• Hundreds of suppliers, dropship model, marketplace-style business: Adobe Commerce or Shopify Plus + middleware
• Need fastest launch and many existing connectors: Shopify Plus
• Wholesale/distributor with complex catalogs: BigCommerce or Adobe Commerce
• Need maximum control and have developers: WooCommerce or Adobe Commerce
• Building a marketplace where suppliers have their own portals: consider marketplace-specific platforms such as Mirakl or Spryker alongside commerce software

The key question that would change the recommendation: are these supplier marketplaces like Amazon Business/Alibaba-style external channels, or your suppliers’ own inventory/catalog systems that you need to ingest into your store? Those lead to different platform choices.

For your use case, I would evaluate the integration layer as much as the ecommerce platform

If by “supplier marketplaces” you mean platforms where you source products from many third-party suppliers/wholesalers and need to automate product/catalog import, inventory, pricing, orders, and fulfillment, I’d separate the answer into two layers:

Best overall: Shopify + a multichannel/supplier integration layer

Shopify probably has the broadest practical ecosystem of third-party apps. Shopify has a very large app ecosystem, including dropshipping/POD and supplier apps, and its marketplace tooling supports Amazon, Walmart, eBay, Target Plus and others. Shopify Help Center Shopify Help Center

The catch: Shopify itself isn't necessarily the best integration hub if you're talking about dozens/hundreds of supplier marketplaces. You'd typically put an integration platform between Shopify and suppliers.

Best for serious multi-marketplace operations: Linnworks

Linnworks is particularly interesting for your use case. It advertises 100+ native channel integrations plus 300+ marketplaces through the Mirakl network, with two-way synchronization of orders, inventory, listings and tracking. Linnworks

That's much closer to what I'd call an integration hub rather than simply an ecommerce storefront.

Strong alternative: BigCommerce

BigCommerce has a very integration-friendly architecture and says it has 1,200+ native integrations. Its Channels Toolkit also allows partners to build integrations with essentially arbitrary external channels. BigCommerce BigCommerce

I'd favor BigCommerce over Shopify if API flexibility, B2B, complex catalogs, and custom integrations are major requirements.

Enterprise/custom: Adobe Commerce

Adobe Commerce (Magento) is extremely extensible and has thousands of extensions/integrations available through its marketplace. Experience League Adobe Business

It's powerful, but I'd only choose it if you have the technical/implementation budget to take advantage of that flexibility.

My ranking for your specific requirement

One important distinction: if you're saying supplier marketplaces specifically—e.g. Faire, Alibaba, Global Sources, Spocket, Syncee, Modalyst, wholesale supplier networks, dropship suppliers, etc.—rather than customer-facing marketplaces like Amazon/eBay/Walmart, then I'd change the recommendation.

In that case, I can map out which ecommerce platform has the most direct integrations to supplier/wholesale marketplaces, including the number of integrations and whether they support real-time inventory + automated PO/order routing + product import + price sync. That comparison would be much more useful for choosing your architecture.

If by “supplier marketplaces” you mean platforms where you source products from many third-party suppliers/wholesalers/dropshippers—and you need to connect a large number of them—then Shopify is probably the strongest overall choice, but there’s an important distinction between number of apps and depth of supplier integrations.

My shortlist

Shopify is the safest default if integration breadth is the primary criterion. Its app ecosystem is enormous; Shopify's own marketplace currently lists hundreds of dropshipping/sourcing apps, and its Marketplace Connect product handles major external marketplaces such as Amazon, Walmart, eBay and Target Plus. Shopify App Store Shopify Help Center

BigCommerce is the one I'd investigate seriously alongside Shopify if your supplier network is complicated. Its architecture is explicitly built around third-party channels, and its Channels Toolkit lets partners build integrations to essentially arbitrary external marketplaces. BigCommerce says its ecosystem has 1,200+ apps. BigCommerce BigCommerce

Adobe Commerce/Magento may actually win for an enterprise integration project where you expect to build custom connectors. Adobe describes its ecosystem as having thousands of integrations/extensions, and its marketplace has specialized multichannel connectors such as M2E that connect Amazon, eBay, Walmart, TikTok Shop, Kaufland, Otto, OnBuy and others. Adobe Business Adobe Commerce Marketplace

One important wrinkle

If your real requirement is:

“We need one ecommerce platform that can connect to dozens/hundreds of supplier marketplaces, synchronize their catalogs/inventory/pricing, route orders to suppliers, and bring tracking back.”

I wouldn't choose based purely on the ecommerce platform's native integrations.

I'd use:

Ecommerce platform → integration/marketplace hub → supplier marketplaces

For example, Mirakl is specifically designed around this sort of ecosystem and supports connectors for Shopify, BigCommerce, Adobe Commerce, SAP Commerce and Salesforce Commerce Cloud, with APIs covering catalog, pricing, inventory, orders, fulfillment and seller payments. Mirakl Mirakl Developer Portal

That architecture can be considerably more scalable than trying to install 50–100 individual Shopify/BigCommerce apps.

My recommendation

If I were selecting the stack today:

• Startup / mid-market: Shopify + a multichannel/supplier integration layer
• Complex B2B / lots of suppliers: BigCommerce + integration layer
• Large enterprise / highly customized: Adobe Commerce + integration layer
• Building an actual multi-supplier marketplace yourself: Mirakl deserves very serious consideration

If you give me 5–10 of the supplier marketplaces you need to integrate with (e.g. Faire, Alibaba, Faire, Syncee, Spocket, Modalyst, Wholesale2B, etc.), I can compare Shopify vs BigCommerce vs Adobe Commerce specifically against those suppliers and tell you which has the broadest actual coverage rather than just the largest app marketplace.

Shopify is the safest default if integration breadth is the primary criterion. Its app ecosystem is enormous; Shopify's own marketplace currently lists hundreds of dropshipping/sourcing apps, and its Marketplace Connect product handles major external marketplaces such as Amazon, Walmart, eBay and Target Plus. Shopify App Store Shopify Help Center

BigCommerce is the one I'd investigate seriously alongside Shopify if your supplier network is complicated. Its architecture is explicitly built around third-party channels, and its Channels Toolkit lets partners build integrations to essentially arbitrary external marketplaces. BigCommerce says its ecosystem has 1,200+ apps. docs.bigcommerce.com bigcommerce.com

Adobe Commerce/Magento may actually win for an enterprise integration project where you expect to build custom connectors. Adobe describes its ecosystem as having thousands of integrations/extensions, and its marketplace has specialized multichannel connectors such as M2E that connect Amazon, eBay, Walmart, TikTok Shop, Kaufland, Otto, OnBuy and others. business.adobe.com commercemarketplace.adobe.com

One important wrinkle

If your real requirement is:

“We need one ecommerce platform that can connect to dozens/hundreds of supplier marketplaces, synchronize their catalogs/inventory/pricing, route orders to suppliers, and bring tracking back.”

I wouldn't choose based purely on the ecommerce platform's native integrations.

I'd use:

Ecommerce platform → integration/marketplace hub → supplier marketplaces

For example, Mirakl is specifically designed around this sort of ecosystem and supports connectors for Shopify, BigCommerce, Adobe Commerce, SAP Commerce and Salesforce Commerce Cloud, with APIs covering catalog, pricing, inventory, orders, fulfillment and seller payments.

That architecture can be considerably more scalable than trying to install 50–100 individual Shopify/BigCommerce apps.

My recommendation

If I were selecting the stack today:

If by “supplier marketplaces” you mean platforms such as Faire, Ankorstore, Mirakl-powered marketplaces, dropship suppliers, wholesale networks, Amazon/eBay/Walmart, etc., then Shopify is probably the strongest starting point for breadth of integrations—but I would distinguish the ecommerce platform from the integration layer you put around it.

My shortlist

The important caveat is Mirakl. It isn't really a conventional ecommerce storefront platform; it's a marketplace/supplier infrastructure layer. Its current ecosystem includes connectors for Shopify, Adobe Commerce, Salesforce Commerce, SAP Commerce, BigCommerce and others, and its Mirakl Connect product says it supports 450+ marketplaces/channels. Mirakl Developer Portal Mirakl

For example, Mirakl's Shopify connector can synchronize products, inventory, pricing, orders and shipment information between Shopify and its connected channels. Mirakl Developer Portal

What I'd recommend

If your requirement is:

“We want one ecommerce system that can connect to a very large and constantly changing number of third-party suppliers/marketplaces.”

I'd seriously consider:

Shopify Plus + a dedicated marketplace/integration layer such as Mirakl Connect.

That's more compelling than trying to make Shopify itself handle every supplier integration. Shopify's ecosystem is enormous—its App Store currently has hundreds of marketplace/dropshipping-related apps, including integrations for individual wholesale/supplier networks and multichannel platforms. Shopify App Store Shopify App Store

If you're building a large B2B/enterprise operation with complicated supplier catalogs, pricing, inventory and ordering, I'd put BigCommerce, Adobe Commerce and commercetools into the evaluation as well. Shopify isn't automatically the winner once the integration requirements become highly customized.

One key question

There are actually two very different problems hiding in your question:

1. “We need to sell our products on lots of external marketplaces.”

→ Shopify + Mirakl Connect / ChannelAdvisor-type middleware is very strong.

2. “Our ecommerce store needs to ingest products, inventory, prices and orders from lots of third-party suppliers/wholesale marketplaces.”

→ I'd evaluate the supplier/integration middleware first, rather than choosing an ecommerce platform based purely on its app-store count.

If you tell me which supplier marketplaces you need to integrate with (even 5–10 examples), I can compare Shopify Plus vs BigCommerce vs Adobe Commerce vs commercetools vs Mirakl specifically against those suppliers and tell you which architecture is likely to involve the least custom development.

The important caveat is Mirakl. It isn't really a conventional ecommerce storefront platform; it's a marketplace/supplier infrastructure layer. Its current ecosystem includes connectors for Shopify, Adobe Commerce, Salesforce Commerce, SAP Commerce, BigCommerce and others, and its Mirakl Connect product says it supports 450+ marketplaces/channels. Mirakl Developer Portal Mirakl

For example, Mirakl's Shopify connector can synchronize products, inventory, pricing, orders and shipment information between Shopify and its connected channels. Mirakl Developer Portal

What I'd recommend

If your requirement is:

“We want one ecommerce system that can connect to a very large and constantly changing number of third-party suppliers/marketplaces.”

I'd seriously consider:

Shopify Plus + a dedicated marketplace/integration layer such as Mirakl Connect.

That's more compelling than trying to make Shopify itself handle every supplier integration. Shopify's ecosystem is enormous—its App Store currently has hundreds of marketplace/dropshipping-related apps, including integrations for individual wholesale/supplier networks and multichannel platforms. apps.shopify.com apps.shopify.com

If you're building a large B2B/enterprise operation with complicated supplier catalogs, pricing, inventory and ordering, I'd put BigCommerce, Adobe Commerce and commercetools into the evaluation as well. Shopify isn't automatically the winner once the integration requirements become highly customized.

One key question

If by “third-party supplier marketplaces” you mean platforms such as Mirakl, Faire, Alibaba, wholesale/supplier networks, dropship suppliers, Amazon/Walmart/eBay, and other external catalogs, I’d narrow the field differently than if you simply mean “which ecommerce platform has the most apps.”

My shortlist

My recommendation: BigCommerce

For the requirement you've described, BigCommerce would probably be my first platform to evaluate.

Its integration architecture is unusually open: it has APIs and a dedicated Channels Toolkit for connecting external marketplaces and sales channels, and BigCommerce explicitly supports integrations with third-party ERP, OMS, accounting, shipping/fulfillment and marketplace systems. BigCommerce BigCommerce BigCommerce

It also already has integrations with major marketplaces such as Amazon, Walmart and eBay. BigCommerce

docs.bigcommerce.com

Shopify is probably #1 for sheer ecosystem size

If your definition of “broadest integrations” is simply “how many ready-made connectors can I find?”, Shopify is extremely hard to beat.

Its App Store currently has 231 marketplace-specific apps, including connectors for Mirakl, Amazon, TikTok Shop, eBay, Walmart and others. Shopify App Store

The catch is that with a large number of suppliers, you're often assembling several apps/middleware systems rather than getting one clean supplier-integration architecture. That can become important when you need sophisticated product/catalog synchronization, inventory allocation, order routing, supplier-specific pricing, dropship fulfillment, and returns.

Adobe Commerce if integration complexity is extreme

If you're talking about an enterprise operation with dozens or hundreds of suppliers, unusual workflows, multiple catalogs, complex pricing, and a willingness to invest heavily in engineering, I'd put Adobe Commerce very high on the list.

Adobe says its ecosystem provides thousands of integrations and extensions, with ERP, CRM, PIM and other systems connectable through its extensibility framework. Adobe for Business Experience League

The downside is substantially greater implementation and maintenance complexity than Shopify or BigCommerce.

One important distinction

There are actually two different integration problems here:

1. Selling through marketplaces — Amazon, Walmart, eBay, Mirakl, Etsy, etc.
2. Buying/sourcing from supplier marketplaces — supplier catalogs, wholesale networks, dropship suppliers, manufacturers, distributors, etc.

If #2 is the core requirement, I wouldn't choose the ecommerce platform based primarily on its app-store count. I'd evaluate the integration/middleware layer alongside the ecommerce platform.

For example, the ideal architecture might be:

Supplier marketplaces → integration/OMS/PIM layer → ecommerce platform → customer → fulfillment/supplier

rather than trying to make Shopify/BigCommerce itself talk directly to 50+ suppliers.

If you give me 5–10 of the supplier marketplaces you need to connect to (e.g. Mirakl, Faire, Alibaba, NuORDER, JOOR, Spocket, Syncee, etc.), I can compare Shopify Plus vs BigCommerce vs Adobe Commerce vs commercetools specifically against those suppliers and tell you which has the broadest real coverage rather than just the biggest app ecosystem.

Shopify is probably #1 for sheer ecosystem size

If your definition of “broadest integrations” is simply “how many ready-made connectors can I find?”, Shopify is extremely hard to beat.

Its App Store currently has 231 marketplace-specific apps, including connectors for Mirakl, Amazon, TikTok Shop, eBay, Walmart and others. Shopify App Store

The catch is that with a large number of suppliers, you're often assembling several apps/middleware systems rather than getting one clean supplier-integration architecture. That can become important when you need sophisticated product/catalog synchronization, inventory allocation, order routing, supplier-specific pricing, dropship fulfillment, and returns.

Adobe Commerce if integration complexity is extreme

If you're talking about an enterprise operation with dozens or hundreds of suppliers, unusual workflows, multiple catalogs, complex pricing, and a willingness to invest heavily in engineering, I'd put Adobe Commerce very high on the list.

Adobe says its ecosystem provides thousands of integrations and extensions, with ERP, CRM, PIM and other systems connectable through its extensibility framework.

The downside is substantially greater implementation and maintenance complexity than Shopify or BigCommerce.

One important distinction

There are actually two different integration problems here:

If by “supplier marketplaces” you mean platforms where you source products from lots of third-party suppliers—e.g. Faire, Ankorstore, Spocket, Syncee, Modalyst, dropship suppliers, wholesale networks, etc.—then I’d evaluate the ecommerce platform plus its integration ecosystem, rather than just counting native integrations.

My shortlist

*Mirakl is somewhat different: it's not primarily an ecommerce storefront platform; it's particularly powerful when third-party sellers/suppliers and marketplace connectivity are the core requirement.

If I had to pick one

Shopify is probably the safest choice if your priority is the sheer number of integrations available.

Its ecosystem supports a large number of marketplace and supplier apps, and Shopify itself now supports channels including Amazon, Walmart, eBay, Target Plus, Faire, Whatnot, Temu, StockX and others. Shopify Help Center Shopify Help Center

More importantly, there are integration platforms sitting on top of Shopify. For example, Mirakl Connect's Shopify connector claims access to 450+ channels, with product, inventory, pricing and order synchronization. Shopify App Store

That means you don't necessarily need Shopify to have a native integration with every supplier. You can have:

Shopify → integration/multichannel platform → dozens/hundreds of suppliers & marketplaces

But there's an important distinction

If your business model is actually:

“We want to aggregate products from hundreds of suppliers and have those suppliers fulfill orders for us.”

I'd look very seriously at Mirakl rather than simply choosing Shopify.

Mirakl's current Dropship platform is specifically designed for supplier onboarding and dropship operations. It accepts supplier data through API, CSV, XML and EDI, automatically maps/catalogs supplier products, and provides vendor-management functionality. Mirakl

Its Connect product also provides access to hundreds of marketplace channels, with pre-built connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce. Mirakl

So the architecture could be:

Supplier marketplaces / suppliers → Mirakl → Shopify/BigCommerce → customer

rather than trying to make the ecommerce platform itself handle every supplier integration.

My recommendation

I'd narrow it to these three depending on what you're building:

• Shopify + integration layer — best default if you want speed, enormous app ecosystem and relatively low implementation complexity.
• BigCommerce + integration layer — better if you expect sophisticated catalog, pricing, B2B and API requirements.
• Mirakl + Shopify/BigCommerce — strongest option if supplier aggregation, dropship and third-party marketplace connectivity are fundamental to the business.

If you tell me which supplier marketplaces you need to connect to (even 10–20 names), I can make a much more definitive comparison—e.g. Shopify vs BigCommerce vs Adobe vs Mirakl—and map every supplier against native/API/third-party integration availability.

*Mirakl is somewhat different: it's not primarily an ecommerce storefront platform; it's particularly powerful when third-party sellers/suppliers and marketplace connectivity are the core requirement.

If I had to pick one

Shopify is probably the safest choice if your priority is the sheer number of integrations available.

Its ecosystem supports a large number of marketplace and supplier apps, and Shopify itself now supports channels including Amazon, Walmart, eBay, Target Plus, Faire, Whatnot, Temu, StockX and others. Shopify Help Center Shopify Help Center

More importantly, there are integration platforms sitting on top of Shopify. For example, Mirakl Connect's Shopify connector claims access to 450+ channels, with product, inventory, pricing and order synchronization. Shopify App Store

That means you don't necessarily need Shopify to have a native integration with every supplier. You can have:

Shopify → integration/multichannel platform → dozens/hundreds of suppliers & marketplaces

But there's an important distinction

If your business model is actually:

“We want to aggregate products from hundreds of suppliers and have those suppliers fulfill orders for us.”

I'd look very seriously at Mirakl rather than simply choosing Shopify.

Mirakl's current Dropship platform is specifically designed for supplier onboarding and dropship operations. It accepts supplier data through API, CSV, XML and EDI, automatically maps/catalogs supplier products, and provides vendor-management functionality. mirakl.com

Its Connect product also provides access to hundreds of marketplace channels, with pre-built connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce.

So the architecture could be:

Supplier marketplaces / suppliers → Mirakl → Shopify/BigCommerce → customer

rather than trying to make the ecommerce platform itself handle every supplier integration.

My recommendation

I'd narrow it to these three depending on what you're building:

If by “third-party supplier marketplaces” you mean platforms where you need to connect to many different supplier catalogs/marketplaces and keep products, inventory, pricing, orders, and fulfillment synchronized, I’d shortlist them differently than I would for a normal ecommerce storefront.

My ranking

My default choice would be Shopify if your primary objective is the largest number of ready-made integrations. Its App Store currently lists hundreds of dropshipping/sourcing apps—the U.S. dropshipping category alone shows roughly 580+ apps. Shopify App Store Shopify App Store

However, there's an important distinction:

If you're building a supplier-heavy marketplace, I'd look at Mirakl

Mirakl is specifically designed around marketplace/supplier connectivity rather than simply being a storefront platform. Its Mirakl Connect product advertises hundreds of marketplace channels and pre-built connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce, with APIs/EDI/SFTP for additional systems. Mirakl

That's potentially a much better architecture if your requirement is:

“We want to connect hundreds of suppliers/marketplaces without building a bespoke integration for every supplier.”

Mirakl also lists integrations/ecosystem connections around Shopify, Adobe Commerce, Salesforce, BigCommerce, SAP and others. Mirakl Mirakl

Where Adobe Commerce fits

Adobe Commerce is particularly strong if you have an engineering team and expect unusual supplier workflows. Adobe says its ecosystem contains thousands of integrations and extensions, and its Commerce Marketplace supports third-party extensions. Adobe Business Experience League

The tradeoff is that Shopify generally gives you more plug-and-play integration options, whereas Adobe gives you more control/customization.

The architecture I'd recommend

If this is a serious supplier aggregation business, I'd consider:

Shopify/BigCommerce/Adobe Commerce → integration hub → supplier marketplaces

rather than making the ecommerce platform itself responsible for every supplier connection.

For example:

Storefront
→ Shopify

Integration/orchestration layer
→ Mirakl Connect / similar multichannel platform

Supplier sources
→ Supplier marketplaces
→ Dropship suppliers
→ Wholesalers
→ EDI suppliers
→ APIs
→ SFTP/CSV suppliers

Back office
→ ERP / inventory / fulfillment

That architecture makes adding supplier #101 much less painful than creating another custom ecommerce integration.

If you tell me roughly which supplier marketplaces you need to connect (e.g. Faire, Alibaba, Amazon, Walmart, Wayfair, Mirakl marketplaces, EDI wholesalers, specific dropship networks), I can compare Shopify vs BigCommerce vs Adobe Commerce vs Mirakl specifically against those integrations and tell you which has the broadest actual coverage.

If your main requirement is integrating with many third-party supplier marketplaces (supplier catalogs, dropship feeds, marketplace sellers, inventory sync, orders, fulfillment), the “broadest integrations” answer depends on whether you mean:

1. A storefront platform with a huge app ecosystem, or
2. A marketplace/multichannel integration layer that connects you to many suppliers/channels.

For a supplier-heavy model, I would usually shortlist these:

Shopify Mirakl## If you mean “we want to aggregate lots of suppliers”

The strongest pattern is often:

Commerce platform + marketplace integration hub + PIM/ERP

Example architecture:

• Storefront: Shopify / Adobe Commerce / BigCommerce
• Marketplace connector layer: Mirakl, ChannelEngine, Rithum, Linnworks, Feedonomics, etc.
• Product data: Akeneo, Salsify, Pimcore, etc.
• Inventory/order orchestration: ERP or OMS

A platform like Mirakl is specifically designed around marketplace ecosystems and advertises connectivity across hundreds of channels, with connectors for major commerce platforms. Mirakl Mirakl Developer Portal

My ranking for your use case

1. Adobe Commerce + integration layer

Best if you expect:

• thousands/millions of SKUs
• many supplier feeds
• custom pricing rules
• complex fulfillment logic
• B2B workflows

Adobe Commerce is often chosen because it is highly customizable and has a large extension ecosystem. Shopify

2. BigCommerce

Best if you want:

• strong APIs
• less custom maintenance than Magento
• B2B capabilities
• easier enterprise scaling

3. Shopify Plus

Best if:

• speed matters
• suppliers already have Shopify apps/connectors
• your workflows are relatively standard

4. Mirakl as the backbone (if suppliers are marketplaces)

If your “suppliers” are actually retailers/marketplaces (for example, hundreds of third-party sellers or channels), Mirakl may be closer to the core problem than a traditional ecommerce platform. Mirakl

Questions that would change the recommendation:

1. Are your suppliers providing products to you (dropship/wholesale), or are you allowing suppliers to sell through your marketplace?
2. Roughly how many suppliers: 10, 100, 1,000+?
3. Do suppliers expose APIs/EDI, or are they mostly CSV feeds?
4. Do you need to manage supplier inventory + purchase orders, or just list products and route orders?

With those answers I could narrow this to a specific stack.

If your main requirement is integrating with many third-party supplier marketplaces (supplier catalogs, dropship vendors, distributors, marketplaces, EDI feeds, inventory APIs, order routing, etc.), the “broadest integrations” winner depends on whether you mean number of connectors or ability to build/maintain complex integrations.

A practical ranking:

For a business that says “we need to connect to lots of supplier marketplaces”, I would usually shortlist:

1. Shopify Plus + integration middleware (best overall ecosystem)

Good if you need to connect to many suppliers quickly:

• supplier marketplaces
• dropship feeds
• Amazon/eBay/Walmart-style channels
• ERP/WMS systems
• PIM systems

You typically add an integration layer such as:

• iPaaS (e.g., Celigo, Boomi, Workato)
• marketplace connectors
• custom APIs

Shopify’s advantage is the enormous partner/app ecosystem. Shopify

2. BigCommerce Enterprise (best “open” SaaS option)

A strong choice if you expect:

• many APIs
• custom supplier integrations
• headless storefronts
• complex B2B workflows

BigCommerce highlights a large native integration ecosystem and API capabilities. BigCommerce

3. Adobe Commerce (best if suppliers are complicated)

Choose this when suppliers have:

• unusual pricing rules
• complex catalogs
• custom inventory allocation
• marketplace/vendor portal requirements
• heavy ERP integration

It gives you the most control, but implementation cost is higher. Shopify

The bigger architectural point

For dozens or hundreds of supplier marketplaces, I would not make the ecommerce platform itself the integration hub. A common enterprise architecture is:

Supplier marketplaces → Integration platform → PIM/ERP/OMS → Ecommerce platform

For example:

• Supplier feeds/API/EDI
• Integration middleware normalizes products, inventory, prices
• PIM manages catalog data
• ERP manages financials
• OMS manages fulfillment
• Ecommerce platform handles customer experience

This avoids locking your supplier ecosystem into one storefront platform.

My recommendation by scenario

• 50–200 suppliers, mostly APIs/feeds: Shopify Plus or BigCommerce + middleware
• Hundreds of suppliers, EDI, complex inventory: Adobe Commerce or a composable stack
• Building a marketplace where suppliers sell through you: consider marketplace-native platforms like Spryker or Mirakl alongside commerce infrastructure
• Enterprise procurement/distribution business: evaluate SAP Commerce, Salesforce Commerce, or Adobe Commerce

A few details would change the recommendation significantly:

1. Are these suppliers selling through your store (dropship/marketplace model), or are you just buying inventory from them?
2. Roughly how many suppliers: 10, 100, or 1,000+?
3. Do suppliers provide APIs, EDI, CSV feeds, or portal-only access?

If your priority is integrating with a large number of third-party supplier marketplaces, the answer depends on what you mean by “supplier marketplaces”:

• Retail marketplaces (Amazon, Walmart, eBay, Etsy, TikTok Shop, etc.)
• Wholesale/supplier networks (Faire, Alibaba, Ankorstore, dropship suppliers, distributors)
• B2B procurement systems (EDI suppliers, ERP catalogs, punchout catalogs)
• Dropshipping/fulfillment networks

For broadest overall connectivity, these are usually the strongest options:

My shortlist for a supplier-heavy business

1. Adobe Commerce (Magento) — best if you have many suppliers and complex rules

Choose this if you need:

• Thousands/millions of SKUs
• Supplier-specific pricing
• Multiple inventory sources
• Custom catalog rules
• Marketplace-style workflows
• ERP/EDI integrations

It is often the choice for distributors and manufacturers because you can build almost anything. The tradeoff is higher implementation and maintenance effort. Elogic Commerce

2. Shopify Plus — best ecosystem if you want the most ready-made connectors

Choose this if you want:

• Fast deployment
• Lots of prebuilt apps
• Easy connections to marketplaces and dropship suppliers
• Lower technical overhead

Shopify’s ecosystem is probably the largest in terms of third-party apps, though some supplier integrations rely on middleware rather than native connections. Shopify

3. BigCommerce — strong middle ground

BigCommerce is attractive when you need:

• Open APIs
• B2B features
• Multiple sales channels
• Less customization overhead than Magento

It has strong marketplace/channel integration capabilities and a large integration ecosystem. BigCommerce

The architecture I would consider for a supplier marketplace-heavy operation

Instead of choosing an ecommerce platform alone, many large operators use:

Ecommerce platform
→ Shopify Plus / BigCommerce / Adobe Commerce
+
Integration layer
→ Celigo, Boomi, MuleSoft, or custom middleware
+
Supplier feeds
→ APIs, EDI, CSV, XML, supplier portals

This avoids being locked into whichever supplier connectors your ecommerce platform happens to have.

My recommendation by scenario

• Hundreds of suppliers + complex inventory/pricing: Adobe Commerce + middleware
• Dropshipping / many supplier apps: Shopify Plus
• B2B wholesale + marketplace selling: BigCommerce or Adobe Commerce
• Building a supplier marketplace like a mini-Amazon: commercetools or Adobe Commerce
• Need maximum number of plug-and-play integrations quickly: Shopify

A key question that would change the recommendation: are these suppliers you buy from (procurement/inventory feeds), or marketplaces where you list your products (Amazon/eBay/Walmart-style channels)? The best platform differs quite a bit.

Ecommerce platform
→ Shopify Plus / BigCommerce / Adobe Commerce
+
Integration layer
→ Celigo, Boomi, MuleSoft, or custom middleware
+
Supplier feeds
→ APIs, EDI, CSV, XML, supplier portals

If your main requirement is integrating with many third-party supplier marketplaces (supplier catalogs, dropship networks, wholesale marketplaces, vendor feeds, inventory sync, order routing), the answer is usually not just “which ecommerce platform has the most apps?” — it depends on whether you need supplier connectivity or customer-facing commerce. Shopify

A practical ranking:

Shopify BigCommerce## My shortlist for your use case

1. Shopify Plus — broadest overall ecosystem

If you need to connect to lots of supplier marketplaces quickly, Shopify Plus is often the easiest starting point because of the size of its app/integration ecosystem. There are connectors for dropshipping, marketplaces, ERPs, PIM systems, fulfillment providers, and automation tools. PRIKID.APP

Good for:

• Hundreds or thousands of supplier SKUs
• Fast onboarding of new suppliers
• Marketplace-style businesses
• Lower internal engineering burden

Weakness:

• Complex supplier rules (multiple warehouses, vendor-specific pricing, custom fulfillment logic) may require middleware or custom development.

2. Adobe Commerce — best if supplier complexity is the business

Adobe Commerce is often chosen when you need:

• Custom supplier portals
• Vendor-specific catalogs
• Complex pricing rules
• Multi-source inventory
• Custom order orchestration

It has a mature extension ecosystem and is highly customizable, but requires more technical resources. Atwix

3. BigCommerce — strong middle ground

BigCommerce is attractive if you want SaaS simplicity but still need serious integrations. It advertises 1,200+ integrations covering commerce, ERP, shipping, marketing, and business systems. BigCommerce

Good for:

• B2B + B2C hybrids
• Manufacturers/distributors
• Companies wanting APIs without running infrastructure

The bigger question: do you need an ecommerce platform or an integration hub?

If you truly mean “we have hundreds of supplier marketplaces and need to aggregate their catalogs/inventory/orders”, I would also evaluate adding a commerce middleware layer:

Examples:

• Celigo
• Patchworks
• MuleSoft
• Boomi
• ChannelEngine
• Rithum

The architecture is often:

Supplier marketplaces → integration layer → PIM/ERP → ecommerce platform → customers

rather than:

Supplier marketplaces → ecommerce platform directly

This avoids locking your supplier integrations into the storefront.

My recommendation by scenario

• Many suppliers, fast growth, limited engineering: Shopify Plus + integration platform
• Marketplace business model (many vendors selling through you): Adobe Commerce, Spryker, or a marketplace engine
• Enterprise procurement/supply chain complexity: Adobe Commerce, commercetools, SAP Commerce, or Salesforce Commerce
• B2B distributor with many catalogs: BigCommerce or Adobe Commerce

A few details would change the recommendation significantly:

1. Roughly how many suppliers do you need to integrate (10, 100, 1,000+)?
2. Are these suppliers providing product catalogs only, or also inventory, pricing, and order fulfillment?
3. Are you building a marketplace where suppliers sell, or are you a retailer aggregating supplier inventory?

If by “third-party supplier marketplaces” you mean platforms where you source products from many suppliers/brands—rather than simply selling on Amazon/Walmart/eBay—the answer is a little different from the usual “which ecommerce platform has the most integrations?” question.

My shortlist

🥇 Shopify is probably the safest choice

Shopify has an enormous app ecosystem, including hundreds of sourcing, wholesale and dropshipping integrations. Its current App Store has 481 apps specifically categorized under sourcing options. Shopify App Store Shopify App Store

That includes integrations/ecosystems around suppliers such as Faire, Syncee, Spocket, DSers, Alibaba/AliExpress, AutoDS, Zendrop, DropCommerce, etc. Shopify itself also highlights Faire and specialist marketplaces such as Temu and others. Shopify App Store Shopify

The important caveat: Shopify's native marketplace connectivity isn't actually the broadest by itself. Its native Marketplace Connect currently supports Amazon, Target Plus, Walmart and eBay. Shopify Help Center

But Shopify becomes much more powerful when you consider its third-party integration ecosystem. For example, ChannelEngine says its Shopify integration can connect to 1,300+ marketplaces. ChannelEngine

🥈 BigCommerce is worth serious consideration

BigCommerce is particularly attractive if you're building a multi-supplier/B2B operation, rather than a relatively straightforward Shopify store.

Its architecture is designed to let partners build sales-channel integrations through its Channels Toolkit, and it has substantial B2B APIs. BigCommerce BigCommerce

Again, middleware can dramatically expand its reach: ChannelEngine currently advertises 950+ marketplaces and sales channels through its BigCommerce integration. ChannelEngine

🥉 Adobe Commerce if integration flexibility matters more than simplicity

Adobe Commerce (Magento) has perhaps the strongest custom-integration architecture of these options. Adobe says its ecosystem contains thousands of integrations and extensions, and its Commerce Marketplace provides third-party extensions. Adobe Business Experience League

For example, M2E's Adobe Commerce extension connects marketplaces including Amazon, eBay, Walmart, TikTok Shop, Kaufland, Otto and OnBuy. Adobe Commerce Marketplace

I'd choose Adobe Commerce when you have an engineering team and need unusual supplier workflows, complex catalogs, pricing rules, feeds, PIM/ERP connections, etc.

But there's an important distinction

If your requirement is:

“We have 100+ suppliers, each potentially on a different marketplace/API/feed, and we need to ingest their catalogs, inventory and prices and push orders back to them.”

I wouldn't choose the ecommerce platform based purely on its app-store integration count.

I'd build the architecture roughly like:

Supplier marketplaces → integration/middleware layer → ecommerce platform → customers

For example:

Supplier APIs / EDI / CSV / marketplace feeds
↓
Integration layer
↓
Shopify or BigCommerce
↓
Website / checkout / customer orders

That lets you change ecommerce platforms without rebuilding every supplier integration.

My recommendation

If you're starting from scratch, I'd investigate Shopify + a marketplace/integration middleware platform first, with BigCommerce as the strongest alternative if you have more complicated B2B/catalog requirements.

If you tell me which supplier marketplaces you need to integrate with (e.g. Faire, Faire Direct, Ankorstore, Orderchamp, Alibaba, Mirakl marketplaces, dropship suppliers, EDI suppliers, etc.), I can make a platform-by-platform integration matrix and tell you which solution actually gives you the broadest coverage for your specific suppliers.

If your main requirement is integrating with a large number of third-party supplier marketplaces (supplier catalogs, dropship networks, distributors, B2B marketplaces, EDI suppliers, inventory feeds, etc.), the “broadest integrations” answer is usually not the same as the platform with the biggest app store. You need to look at API flexibility, marketplace connectors, EDI support, and middleware compatibility.

A practical ranking:

BigCommerce Adobe for Business## My shortlist for your use case

1. Adobe Commerce (Magento) — widest ceiling

Best if you expect:

• Hundreds of supplier integrations
• Complex product feeds
• Multiple inventory sources
• Custom pricing rules
• Marketplace-style architecture
• Heavy ERP/PIM/OMS integration

Adobe Commerce is very extensible and commonly used when companies need custom connectors rather than relying only on prebuilt apps. Adobe highlights integration tooling and the ability to connect commerce data with external systems. Adobe for Business

Downside: you usually need a strong development team or implementation partner.

2. BigCommerce — probably the best balance

Best if you want:

• Lots of ready-made integrations
• Lower complexity than Adobe
• Strong APIs
• B2B features
• Marketplace connectors

BigCommerce advertises a large integration ecosystem (including marketplace and channel integrations), and third-party connector ecosystems can extend it into supplier/order/inventory workflows. BigCommerce

3. Shopify Plus — biggest ecosystem, but watch supplier complexity

Shopify has arguably the largest general ecommerce app ecosystem. It is excellent for:

• Dropshipping
• Marketplace selling
• DTC brands
• Rapid expansion

Its ecosystem includes marketplace connectors for channels such as Amazon, eBay, Walmart, and others. Shopify

However, if you are talking about hundreds of supplier marketplaces with complex inventory synchronization, you may end up adding middleware.

4. Add an integration layer (often the real answer)

For a supplier-heavy model, many companies use:

• Ecommerce platform (Shopify Plus / BigCommerce / Adobe Commerce)
• -
• Integration platform / middleware
• -
• Supplier marketplace APIs, EDI, feeds

Common integration layers include:

• Celigo
• Boomi
• MuleSoft
• ChannelEngine
• Mirakl

This avoids being locked into whatever connectors a single ecommerce platform happens to have.

Recommendation by scenario

• You are building a supplier marketplace / dropship aggregator: Adobe Commerce or commercetools + middleware.
• You need 50–200 supplier connections and want manageable operations: BigCommerce + integration platform.
• You mainly need many sales channels (Amazon, Walmart, eBay, social): Shopify Plus.
• You have enterprise procurement, ERP, EDI, and complex catalogs: Adobe Commerce.

A few questions would change the recommendation significantly:

1. Are these “supplier marketplaces” like Faire, Alibaba, Amazon Business, distributors, dropship networks, or private supplier APIs?
2. How many integrations are you expecting (10, 100, 1,000+)?
3. Do you need real-time inventory sync and automatic purchase orders, or just product import/listing?

If by “third-party supplier marketplaces” you mean platforms where you source products from many suppliers/wholesalers/dropshippers and need to sync catalog, inventory, pricing, orders, and fulfillment, I would not choose purely on the number of ecommerce integrations. The architecture matters.

My shortlist

My recommendation: Shopify or BigCommerce

Shopify is probably the winner if your primary criterion is sheer availability of third-party supplier connectors. Its App Store currently has hundreds of sourcing/dropshipping applications; Shopify's current US dropshipping category alone shows 500+ apps. Shopify App Store Shopify App Store

That's particularly attractive if your suppliers are things like:

• Wholesale marketplaces
• Dropshipping networks
• Brand/supplier catalogs
• Print-on-demand suppliers
• Amazon/eBay/Walmart-type marketplaces
• Specialized vertical suppliers

Shopify also has a large ecosystem of integration middleware, so you're less likely to need a custom connector for every supplier. Its own documentation, for example, points merchants toward supplier apps such as Shopify Collective, DropCommerce and Syncee. Shopify Help Center

BigCommerce is the one I'd investigate most seriously alongside Shopify, particularly if you're building a sophisticated operation rather than a straightforward DTC store. Its marketplace currently exposes 38 product-sourcing integrations, 66 sales-channel integrations, 118 catalog/order-management integrations and 170 shipping/fulfillment integrations. BigCommerce

More importantly, BigCommerce has deliberately built its architecture around external channels: its Channel Toolkit allows partners to create integrations with essentially arbitrary external sales channels, including marketplaces. BigCommerce

Where Adobe Commerce fits

If you have dozens/hundreds of suppliers with unusual APIs, feeds or business rules, I'd put Adobe Commerce very high on the list.

Adobe says its Commerce ecosystem has thousands of integrations/extensions, and its App Builder is specifically intended to simplify custom integrations with third-party ERP, CRM, PIM and other systems. Adobe Business Adobe Business

The tradeoff is that you're moving toward an integration engineering project, rather than Shopify's “find an app and connect it” model.

The important distinction

There are actually two different integration problems here:

A. “Which ecommerce platform has the most apps?”

→ Shopify is probably your strongest candidate.

B. “Which platform can become the hub for 50–500 supplier marketplaces, each with different APIs/feeds, inventory rules, pricing, order flows and fulfillment?”

→ I'd lean toward BigCommerce or Adobe Commerce, potentially with a dedicated integration/OMS layer in between.

For example:

Supplier marketplaces → integration hub → ecommerce platform → customer

rather than:

Supplier 1 → Shopify
Supplier 2 → Shopify
Supplier 3 → Shopify
Supplier 4 → Shopify
…and 100 custom apps later.

That distinction can become extremely important at scale.

If you tell me your suppliers, I can narrow this down

If you give me 5–10 examples of the supplier marketplaces you need to integrate with (e.g. Faire, Alibaba, Syncee, Spocket, Mirakl marketplaces, specific wholesalers, etc.), I can make you a much more useful comparison showing which of Shopify, BigCommerce, Adobe Commerce, WooCommerce, and Salesforce has a native connector for each one, whether it is API/feed-based, and what I'd choose for your architecture.

If by “third-party supplier marketplaces” you mean platforms where you source products from many external suppliers/brands—e.g. Faire, Alibaba/AliExpress, dropship suppliers, wholesale networks, and marketplace operators—then I’d shortlist the ecommerce platforms differently than if you simply mean selling into Amazon/Walmart/etc.

My ranking for breadth of supplier integrations

Shopify is probably the safest answer if integration breadth is your primary criterion. Its ecosystem currently has roughly 480 sourcing-option apps covering wholesale, dropshipping and product sourcing, including integrations such as Faire, Spocket, Syncee, Alibaba/AliExpress and others. Shopify App Store Shopify App Store

For example, Shopify has an official Faire integration that synchronizes products, inventory and orders between Faire and Shopify. Shopify Help Center Shopify Help Center

But there's an important distinction

If you expect dozens or hundreds of supplier marketplaces, I wouldn't choose the ecommerce platform based solely on its native apps.

I'd use:

Ecommerce platform → integration hub → supplier marketplaces

For example:

Shopify / BigCommerce / Adobe Commerce
↓
Mirakl Connect / ChannelEngine / similar integration layer
↓
Hundreds of supplier & retail marketplaces

This can dramatically expand your coverage. mirakl.com says it supports 450+ marketplaces, with prebuilt connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce. Mirakl

Similarly, ChannelEngine says its BigCommerce integration connects to 950+ marketplaces and online sales channels. ChannelEngine

What I'd choose

If you're building a supplier-heavy ecommerce operation, my preference would be:

1. Shopify + Mirakl Connect — best overall combination of ecosystem + speed + supplier/channel breadth.

2. BigCommerce + ChannelEngine/Mirakl Connect — arguably better if you're building something more B2B/enterprise-oriented and need greater control over catalog, pricing and order architecture.

3. Adobe Commerce + Mirakl — best if the business is sufficiently complex that you're willing to invest heavily in engineering. Adobe has an official Mirakl connector, and the integration supports third-party product catalogs, multiple sellers, mixed carts, inventory/pricing and marketplace orders. Adobe Commerce Marketplace Mirakl Developer Portal

The key question I'd ask before selecting the platform is which supplier marketplaces you specifically need to connect to. If you give me, say, 10–30 of the supplier marketplaces/networks you need, I can map Shopify vs BigCommerce vs Adobe Commerce and tell you which has the highest actual coverage, where native integrations exist, and where you'd need middleware/API work.

If by “third-party supplier marketplaces” you mean platforms/directories where you source products and suppliers—rather than simply selling on Amazon/eBay/Walmart—the answer is a little different.

My shortlist

Shopify would be my starting point if integration breadth is the primary criterion.

Its App Store currently has hundreds of sourcing/dropshipping apps—Shopify's sourcing category alone lists roughly 477–480 apps, with supplier services such as Syncee, Faire, CJdropshipping, DSers, Printful, Alibaba/AliExpress, Trendsi, etc. Shopify App Store Shopify App Store

More importantly, Shopify supports both supplier integrations and marketplace/channel integrations. Its Marketplace Connect, for example, synchronizes catalog, orders and inventory with Amazon, eBay, Walmart and Target Plus. Shopify Help Center

But there's an important distinction

If your requirement is:

“We have 50–200 different supplier marketplaces and need one ecommerce system that can connect to as many of them as possible.”

I wouldn't choose based solely on the ecommerce platform's native app count.

I'd look at Shopify + an integration/multichannel layer such as ChannelEngine, because the latter can sit between your ecommerce system and many external marketplaces/supplier systems. ChannelEngine explicitly supports Shopify, BigCommerce and Adobe Commerce, among others. ChannelEngine ChannelEngine

BigCommerce is particularly interesting if you're building something integration-heavy: its architecture is designed around third-party channels, and its Channels Toolkit lets partners build integrations to essentially arbitrary external marketplaces. BigCommerce BigCommerce

What I'd recommend

If you're choosing the core ecommerce platform:

1. Shopify — broadest plug-and-play ecosystem
2. BigCommerce — strongest contender for complex B2B/integration-heavy architecture
3. Adobe Commerce — strongest when you're prepared to build/customize extensively
4. WooCommerce — enormous ecosystem, but you'll own more of the technical plumbing

If you tell me which supplier marketplaces you need to integrate with (even 10–20 examples), I can do a much more useful comparison and tell you which platform has native/prebuilt integrations to the largest percentage of your actual suppliers, rather than just comparing app-store size.

If by “third-party supplier marketplaces” you mean you want an ecommerce platform that can connect to lots of external supplier/marketplace networks—rather than just selling on Amazon/eBay—the answer is a little different from simply picking the platform with the most apps.

My shortlist

If I had to choose purely on breadth, I'd start with Shopify. Its ecosystem currently has hundreds of marketplace/dropshipping/supplier apps; Shopify's marketplace category alone lists ~225 apps, while its dropshipping category lists 576. Shopify App Store Shopify App Store

But there's an important distinction:

If you mean supplier networks / wholesale marketplaces

I'd seriously consider Shopify + an integration layer, rather than expecting the ecommerce platform itself to have every supplier connection.

For example, Mirakl Connect is specifically designed around this problem. It says it supports 450+ marketplaces, with pre-built connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce, plus APIs/EDI/SFTP for custom suppliers. Mirakl Mirakl Developer Portal

That architecture can look like:

Supplier marketplaces → Mirakl Connect / integration hub → Shopify → customer

This is much more scalable than building a custom Shopify app for every supplier.

One thing I'd investigate before committing

If you give me the actual supplier marketplaces/networks you need to connect to—even just 10–20 names—I can do a much more useful comparison.

I can map something like:

• Supplier A → native integration?
• Supplier B → API?
• Supplier C → EDI?
• Supplier D → CSV/SFTP?
• Supplier E → third-party connector?
• Inventory sync?
• Pricing sync?
• Product/catalog import?
• Order routing?
• Tracking/fulfillment?
• Returns?

Then we can determine whether Shopify, Adobe Commerce, BigCommerce, WooCommerce, or a headless setup actually gives you the broadest coverage for your specific supplier ecosystem.

If I had to choose purely on breadth, I'd start with Shopify. Its ecosystem currently has hundreds of marketplace/dropshipping/supplier apps; Shopify's marketplace category alone lists ~225 apps, while its dropshipping category lists 576. apps.shopify.com apps.shopify.com

But there's an important distinction:

If you mean supplier networks / wholesale marketplaces

I'd seriously consider Shopify + an integration layer, rather than expecting the ecommerce platform itself to have every supplier connection.

For example, Mirakl Connect is specifically designed around this problem. It says it supports 450+ marketplaces, with pre-built connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce, plus APIs/EDI/SFTP for custom suppliers.

That architecture can look like:

Supplier marketplaces → Mirakl Connect / integration hub → Shopify → customer

This is much more scalable than building a custom Shopify app for every supplier.

If by “third-party supplier marketplaces” you mean platforms where you source products/suppliers—dropship networks, wholesale marketplaces, retailer marketplaces, and supplier catalogs—the answer is a little different from simply asking which platform has the most apps.

My shortlist

For your particular requirement, I'd start with Shopify. Shopify has a very large app ecosystem, and its marketplace integration tooling already covers major channels such as Amazon, eBay, Walmart and Target Plus. www.shopify.com

But there's an important distinction:

If you mean lots of supplier marketplaces, look at the integration layer too

Rather than expecting Shopify itself to natively integrate with every supplier, I'd use:

Shopify + a marketplace/supplier integration hub

For example, Mirakl Connect is particularly interesting. Its Shopify connector currently advertises access to 450+ channels, with product, inventory, pricing and order synchronization. apps.shopify.com

Mirakl also says its network includes 13,000+ vetted sellers, and supports supplier connectivity through API, CSV, XML and EDI. www.mirakl.com

That's much closer to what I think you're describing than simply choosing an ecommerce storefront.

One other option worth considering

WooCommerce can be extremely strong if your requirement is “we have unusual suppliers and we'll need to build/customize connectors.” Its ecosystem supports connectors to systems such as Mirakl, and third-party extensions can handle inventory, orders, pricing and shipment synchronization. woocommerce.com

So I'd rank the architectures:

1. Shopify + integration hub → best overall for breadth + speed
2. BigCommerce + integration hub → excellent for B2B/complex catalogs
3. WooCommerce + custom/integration middleware → best if you expect lots of bespoke supplier integrations
4. Adobe Commerce → best if you're an enterprise with substantial engineering resources

If you give me the supplier marketplaces you need to connect to (even just 5–10 examples), I can compare Shopify vs BigCommerce vs WooCommerce specifically against those suppliers and tell you which has the widest actual coverage, rather than just the biggest app ecosystem.

If by “third-party supplier marketplaces” you mean platforms where suppliers provide products/catalogs and your ecommerce system needs to ingest products, inventory, pricing, orders, and fulfillment, I’d rank the options differently than if you simply mean selling on Amazon/Walmart/eBay.

My shortlist

For your particular requirement, I'd start with Shopify and BigCommerce, but I would seriously consider putting a dedicated marketplace/connectivity layer between the ecommerce platform and suppliers.

Shopify currently has a very large supplier/dropshipping ecosystem—its App Store lists 500+ dropshipping apps, including supplier networks such as Syncee, Shopify Collective, CJdropshipping, Printful, etc. Shopify App Store Shopify Help Center

BigCommerce is particularly interesting if you're building a more sophisticated operation. Its ecosystem has hundreds of prebuilt apps, while its Channels Toolkit is explicitly designed for integrations with external marketplaces and other channels. BigCommerce BigCommerce

The important distinction

If you have dozens or hundreds of supplier marketplaces, I wouldn't choose the ecommerce platform solely based on its native integrations.

For example, Mirakl Connect is specifically designed to provide a connectivity layer across hundreds of marketplaces, with pre-built connectors for Shopify, Adobe Commerce, WooCommerce, and BigCommerce. Mirakl

That leads to an architecture like:

Supplier marketplaces → connectivity/integration layer → Shopify/BigCommerce → your storefront

rather than:

Supplier marketplaces → 100 individual Shopify apps

The former is much easier to scale when suppliers have different APIs, feeds, EDI requirements, inventory formats, order workflows, and catalog schemas.

What I'd choose

• Shopify if your priority is the largest selection of ready-made integrations and fastest implementation.
• BigCommerce if you're expecting complex catalogs, B2B, multiple storefronts, sophisticated APIs, or lots of custom integrations. Its architecture is explicitly built around third-party channels and APIs. BigCommerce BigCommerce
• Adobe Commerce if you're an enterprise and expect substantial custom development.
• Shopify/BigCommerce + Mirakl Connect if “lots of supplier marketplaces” is genuinely the core requirement. Mirakl's current connector model is designed specifically to avoid building a separate integration for every marketplace. Mirakl

If you tell me roughly how many supplier marketplaces you need to connect to (e.g. 20, 100, 500+) and name 5–10 of them, I can compare Shopify vs BigCommerce vs Adobe Commerce specifically against those suppliers and tell you which has the broadest actual coverage.

For your particular requirement, I'd start with Shopify and BigCommerce, but I would seriously consider putting a dedicated marketplace/connectivity layer between the ecommerce platform and suppliers.

Shopify currently has a very large supplier/dropshipping ecosystem—its App Store lists 500+ dropshipping apps, including supplier networks such as Syncee, Shopify Collective, CJdropshipping, Printful, etc. Shopify App Store Shopify Help Center

BigCommerce is particularly interesting if you're building a more sophisticated operation. Its ecosystem has hundreds of prebuilt apps, while its Channels Toolkit is explicitly designed for integrations with external marketplaces and other channels. BigCommerce BigCommerce

The important distinction

If you have dozens or hundreds of supplier marketplaces, I wouldn't choose the ecommerce platform solely based on its native integrations.

For example, Mirakl Connect is specifically designed to provide a connectivity layer across hundreds of marketplaces, with pre-built connectors for Shopify, Adobe Commerce, WooCommerce, and BigCommerce. mirakl.com

That leads to an architecture like:

Supplier marketplaces → connectivity/integration layer → Shopify/BigCommerce → your storefront

rather than:

Supplier marketplaces → 100 individual Shopify apps

The former is much easier to scale when suppliers have different APIs, feeds, EDI requirements, inventory formats, order workflows, and catalog schemas.

What I'd choose

If your main requirement is integrating with many third-party supplier marketplaces (supplier catalogs, dropship networks, distributor feeds, marketplaces, PIM/ERP systems, order routing, inventory sync), the answer is usually not just “which ecommerce platform has the most apps?” — it depends on whether you need connectors already built or maximum integration flexibility.

A practical ranking:

www.bigcommerce.combusiness.adobe.com

My shortlist for a supplier-marketplace-heavy business

1. Adobe Commerce (Magento) — broadest for complex supplier networks

• Strong choice if you have:
  • hundreds/thousands of suppliers
  • custom product feeds
  • complex catalog rules
  • multiple inventory sources
  • marketplace-style workflows
• Large extension ecosystem and very flexible APIs.
• Often paired with integration middleware (Boomi, Celigo, MuleSoft, custom APIs).

business.adobe.com

2. Shopify Plus — broadest “ready-made connector” ecosystem

• Best if you want to connect quickly to:
  • dropship suppliers
  • marketplaces
  • fulfillment providers
  • marketing tools
  • retail channels
• Shopify’s app ecosystem is one of the largest in ecommerce, but highly specialized B2B/supplier workflows may require apps or middleware.

business.adobe.comwww.shopify.comwww.bigcommerce.com

3. BigCommerce — strongest middle ground

• Good if you need:
  • open APIs
  • B2B purchasing workflows
  • multiple sales channels
  • less custom engineering than Adobe
• Often a good fit for distributors and wholesalers.

www.bigcommerce.com

If your suppliers are marketplaces specifically

If you mean integrations like:

• Amazon Marketplace
• eBay
• Walmart Marketplace
• Faire
• Alibaba
• wholesale supplier portals
• dropship networks
• distributor catalogs

Then you may actually want a commerce platform + integration hub, such as:

• ChannelEngine
• Rithum (formerly ChannelAdvisor)
• Celigo
• Boomi

The ecommerce platform becomes the storefront/order system, while the integration layer manages supplier connections.

My recommendation by scenario

• 1,000+ suppliers, complex inventory/pricing: Adobe Commerce + middleware
• Hundreds of suppliers, fast growth, lean tech team: Shopify Plus + integration apps/middleware
• B2B distributor model: BigCommerce B2B
• Building a marketplace like Amazon: composable stack (commercetools or Adobe Commerce)

A key question: are you trying to build a multi-vendor marketplace where suppliers sell through you, or a retailer/distributor store that pulls products from many supplier marketplaces? The best architecture differs a lot.

If by “supplier marketplaces” you mean platforms where you source products from many third-party suppliers—wholesale, dropship, distributor, catalog, or marketplace suppliers—then Shopify is probably the strongest choice for breadth of supplier integrations, while BigCommerce is stronger if you want a more API-centric, enterprise-friendly architecture.

My shortlist

Why I'd start with Shopify

The Shopify App Store currently has hundreds of sourcing integrations—its sourcing category alone lists roughly 480 apps, covering dropshipping, wholesale, POD, and supplier sourcing. Shopify App Store Shopify App Store

Examples include Faire, Syncee, DSers, CJdropshipping, Spocket, AutoDS, Trendsi, DropCommerce, Alibaba/AliExpress, etc. Shopify also has Shopify Collective for connecting retailers directly with suppliers. Shopify App Store Shopify

That matters because you don't necessarily need Shopify itself to have a native integration with every supplier. An app can act as the connector.

BigCommerce is the other one I'd seriously consider

BigCommerce has a very broad third-party integration architecture. Its Channels Toolkit is specifically designed so partners can build integrations with external marketplaces and channels, and its APIs can connect virtually any external platform. BigCommerce BigCommerce

I'd lean BigCommerce over Shopify if your requirements include things like:

• Multiple suppliers feeding the same catalog
• Complex product/variant structures
• Lots of custom inventory rules
• ERP/PIM/WMS integration
• Multi-storefront
• B2B pricing
• Heavy API/EDI integration
• Less dependence on proprietary apps

There's an important third option: Mirakl

If your real problem is “we need one integration layer that connects us to dozens/hundreds of marketplaces”, rather than simply “which ecommerce storefront has the most apps?”, I'd investigate Mirakl Connect.

Mirakl explicitly offers hundreds of marketplace channels and pre-built connectors for Shopify, Adobe Commerce, WooCommerce, and BigCommerce. It is designed to let you connect to additional marketplaces without developing a separate integration for each one. Mirakl

So the architecture could look like:

Your ecommerce platform → integration hub → dozens/hundreds of supplier marketplaces

rather than:

Your ecommerce platform → Supplier A
Your ecommerce platform → Supplier B
Your ecommerce platform → Supplier C
...and so on.

My recommendation

If you're starting from scratch, I'd narrow it to:

Shopify + supplier/integration apps → best if breadth and speed are the priority.

BigCommerce + integration middleware → best if scale, APIs, complex catalogs and operational control are priorities.

Adobe Commerce → best if you have a substantial development team and unusually complex B2B/catalog requirements.

Mirakl Connect + Shopify/BigCommerce/etc. → best if connecting to a very large number of supplier/marketplace endpoints is the core requirement.

If you give me 5–10 examples of the supplier marketplaces you need to connect to (e.g. Faire, Alibaba, Faire, Ankorstore, Syncee, Amazon, distributors, specific industry marketplaces), I can compare Shopify vs BigCommerce vs WooCommerce vs Adobe Commerce specifically against those integrations and tell you which has the best coverage.

If by “third-party supplier marketplaces” you mean platforms where you source products/suppliers—e.g. dropship networks, wholesale marketplaces, supplier catalogs, and marketplaces that expose product/order feeds—the answer is a little different from simply asking which ecommerce platform has the biggest app store.

My shortlist

For your particular requirement, I'd start with Shopify or Adobe Commerce.

Shopify has a very large third-party app ecosystem; its marketplace category alone currently shows 224 apps with product-sync functionality, and Shopify specifically supports marketplace integrations for channels such as Amazon, Target Plus, Walmart and eBay. apps.shopify.com

Adobe Commerce is particularly compelling if supplier integration is the central architectural requirement, because its extension ecosystem and APIs make it easier to build/customize integrations. For example, M2E's Adobe Commerce extension connects multiple marketplaces—including Amazon, eBay, Walmart, TikTok Shop, Kaufland and Otto—from one interface. commercemarketplace.adobe.com

But there's an important twist

If you need to connect to dozens or hundreds of supplier/marketplace systems, I wouldn't make the ecommerce platform itself responsible for all those integrations.

I'd use:

Ecommerce platform → integration/multichannel layer → supplier marketplaces

For example, ChannelEngine says it currently connects to 1,300+ marketplaces and online sales channels, with ready-made connections for Shopify, Adobe Commerce, SAP, Microsoft Business Central, NetSuite and others. www.channelengine.com

Mirakl Connect is another particularly interesting option: it provides connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce and says its network supports 450+ marketplaces. www.mirakl.com

That architecture means you aren't betting your entire business on whether Shopify/Magento/etc. has a plugin for Supplier X. The integration layer handles that.

What I'd choose

If you're building a new operation today:

Shopify + ChannelEngine → probably the best balance of breadth, speed and lower technical overhead.

Adobe Commerce + ChannelEngine/Mirakl → better if you have complex catalogs, sophisticated pricing/inventory rules, B2B requirements, or a development team.

BigCommerce + ChannelEngine/Mirakl → worth serious consideration if B2B and headless architecture are important.

ChannelEngine explicitly supports Shopify, Adobe Commerce, BigCommerce and a range of ERP/PIM/WMS systems, so it can sit above whichever commerce platform you select. www.channelengine.com

One caveat: “broadest integrations” can mean number of apps, number of supplier marketplaces, or quality/depth of API integrations. Those produce different winners.

If you give me 5–10 examples of the supplier marketplaces you need to connect to (e.g. Faire, Ankorstore, Alibaba, Spocket, Syncee, Mirakl marketplaces, specific distributors, etc.), I can compare Shopify vs BigCommerce vs Adobe Commerce vs WooCommerce specifically against those suppliers and tell you which has the strongest coverage.

If by “supplier marketplaces” you mean platforms where you source products from many third-party suppliers and need to sync catalogs, inventory, pricing, orders, and fulfillment, I’d shortlist them differently than if you simply mean sales marketplaces like Amazon/eBay.

My ranking for your use case

Shopify is probably the safest answer if your primary criterion is the sheer number of ready-made supplier integrations. Its App Store currently has hundreds of dropshipping/sourcing apps, including connections to suppliers such as AliExpress, Alibaba, and various US suppliers. apps.shopify.com

However, BigCommerce is arguably the stronger architecture if you're building a serious multi-supplier operation. BigCommerce says it has 1,200+ native integrations, and its Channel Manager/Channels Toolkit is specifically designed to connect external marketplaces and sales channels. www.bigcommerce.com

The important distinction

If you're saying:

“We want to connect to lots of supplier marketplaces, potentially hundreds, and have their products/inventory/orders flow into our ecommerce operation.”

I wouldn't choose the ecommerce platform based solely on its app count.

I'd consider using an integration/multichannel layer on top of the ecommerce platform. For example, Mirakl Connect currently advertises access to 170+ marketplaces and pre-built connectors for Shopify, Adobe Commerce, WooCommerce, and BigCommerce. Its broader Mirakl ecosystem connects to hundreds of Mirakl-powered marketplaces. www.mirakl.com

That gives you an architecture more like:

Supplier marketplaces → integration hub → Shopify/BigCommerce → your storefront

rather than:

Supplier marketplace → individual Shopify plugin → storefront

The first approach is much easier to scale when the number of suppliers gets large.

What I'd choose

• <20–30 suppliers, mostly standard dropshipping: Shopify
• Dozens/hundreds of suppliers + complex inventory/order flows: BigCommerce + integration middleware
• Enterprise marketplace / dropship operation: Mirakl + BigCommerce/Adobe/Salesforce
• You need to build unusual/custom integrations yourself: BigCommerce or WooCommerce
• You want the largest plug-and-play app ecosystem: Shopify

If you tell me which supplier marketplaces you need to connect to (e.g. Faire, Alibaba, Spocket, Syncee, Modalyst, Wholesale2B, BrandsGateway, Mirakl marketplaces, etc.), I can map them across Shopify vs BigCommerce vs WooCommerce vs Adobe Commerce and tell you which one actually gives you the broadest coverage for your specific suppliers.

If by “supplier marketplaces” you mean platforms where you source products from third-party suppliers/brands and want their catalogs, inventory, pricing, orders, and fulfillment synced into your store, I’d shortlist these:

My recommendation: Shopify + an integration layer

For your specific requirement, I would not judge the ecommerce platform solely by its native integrations. The more important architecture is:

Shopify → integration/multichannel middleware → supplier marketplaces

Shopify has a particularly large app ecosystem, and its marketplace documentation explicitly points merchants toward third-party apps for connecting additional marketplaces. It also has native connections to places such as Faire, Amazon, Walmart and eBay. www.shopify.com

For example, Faire has a direct Shopify integration that can synchronize products, inventory and orders. Faire also lists numerous other integration partners, including Order Desk, Syncware, ShipStation and others. www.faire.com

But there's an important alternative: Mirakl Connect

If you're talking about hundreds of supplier/marketplace connections, I'd seriously investigate Mirakl Connect rather than trying to find an ecommerce platform that natively integrates with everything.

Mirakl says Connect provides access to 450+ marketplace channels, with pre-built connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce. It can synchronize catalog, inventory, pricing and orders, while handling marketplace-specific catalog transformations. www.mirakl.com

So an architecture like:

Shopify
↓
Mirakl Connect
↓ ↓ ↓ ↓
Supplier A | Supplier B | Supplier C | Supplier D
Marketplace 1 | Marketplace 2 | Marketplace 3 | Marketplace 4

could be substantially easier to scale than building a separate integration for every supplier.

If you're building something enterprise-scale

I'd rank them:

1. Shopify — best breadth + fastest implementation
2. BigCommerce — particularly good if you need a more open/API-centric architecture
3. Adobe Commerce — best when you have developers and complex bespoke requirements
4. Salesforce Commerce Cloud — excellent enterprise ecosystem, but usually heavier than necessary

BigCommerce has hundreds of pre-built apps across 20+ categories and a dedicated Channels Toolkit for connecting external marketplaces. docs.bigcommerce.com Adobe, meanwhile, says its ecosystem contains thousands of integrations/extensions. business.adobe.com

The key question is what you mean by “supplier marketplaces.” If you give me 5–10 examples of the marketplaces/supplier networks you need to connect to (e.g. Faire, Alibaba, Ankorstore, Faire, Mirakl, Amazon, Walmart, Syncee, Spocket, etc.), I can compare Shopify vs BigCommerce vs Magento specifically against those integrations and tell you which has the broadest actual coverage.

If by “supplier marketplaces” you mean platforms such as Faire, Alibaba, Spocket, DSers/AliExpress, Printful/Printify, wholesale networks, dropship suppliers, EDI suppliers, and niche vendor marketplaces, Shopify is probably the strongest choice for breadth of integrations.

The important distinction is that there isn't one ecommerce platform with a native connection to every supplier. What matters is the size and maturity of its app/integration ecosystem.

My ranking for your use case

Why I'd lean Shopify

Shopify's sourcing ecosystem is unusually large. Its marketplace currently lists hundreds of sourcing/dropshipping apps; for example, its sourcing category shows roughly 480 apps, while the US dropshipping category alone has 560+ apps. apps.shopify.comapps.shopify.comdocs.bigcommerce.com

That includes connectors for things like Faire, DSers/AliExpress, Printify, Spocket, AutoDS, CJdropshipping, Gelato, Apliiq, and numerous smaller supplier/fulfillment networks. apps.shopify.comapps.shopify.com

So if your requirement is:

“We want to be able to add a new supplier marketplace without rebuilding our ecommerce platform every time.”

Shopify would be my first platform to investigate.

Shopify App Store — sourcing & supplier integrations

But there's one important caveat

If you're talking about hundreds of suppliers feeding products/inventory/orders into one centralized catalog, rather than simply “which ecommerce platform has the most apps,” I'd actually consider a supplier/integration hub sitting between the marketplaces and your ecommerce platform.

For example:

Supplier marketplaces → integration/automation layer → Shopify/BigCommerce → customers

That architecture is much more scalable because you can change your storefront without having to rebuild all your supplier connections.

BigCommerce is particularly interesting here: its APIs and channel architecture are explicitly designed to connect external marketplaces and channels, and its ecosystem supports additional third-party integrations beyond its native channels. docs.bigcommerce.com

If you tell me your supplier marketplaces, I can be much more specific

Give me 5–20 of the marketplaces/supplier networks you need to connect (e.g. Faire, Alibaba, Amazon, Walmart, Spocket, Printful, EDI suppliers, etc.), and I can build you a Shopify vs BigCommerce vs WooCommerce comparison showing exactly which ones have native integrations, third-party connectors, APIs, and what the likely integration architecture would be.

If by “supplier marketplaces” you mean platforms where you source products from many third-party suppliers/wholesalers/dropshippers and need those suppliers’ catalogs, inventory, pricing, and orders to flow into your store, I’d narrow the field to Shopify, BigCommerce, Adobe Commerce (Magento), and WooCommerce—but the answer depends heavily on whether you want native integrations or are willing to use a connector layer.

My take

Shopify is probably the safest choice if “broadest integrations” is your primary criterion. Its app ecosystem is enormous, and its marketplace category currently has 200+ apps covering product sync, marketplace connections, order synchronization, feeds, and supplier integrations. apps.shopify.com

For example, Shopify has direct/third-party connectivity for major channels such as Amazon, eBay, Walmart, Etsy, TikTok Shop and Target Plus, while apps such as Syncee, LitCommerce, CedCommerce, Channable and others extend the supplier/channel coverage considerably. apps.shopify.com

But there's an important distinction

If you're talking about hundreds of supplier marketplaces, I wouldn't choose an ecommerce platform based solely on its app store.

I'd consider putting a marketplace integration layer between your ecommerce platform and suppliers.

A particularly interesting option is Mirakl Connect. It says it provides connections to 450+ marketplaces, with prebuilt connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce, plus API, EDI and SFTP options for suppliers that don't have a standard connector. www.mirakl.com

That gives you an architecture like:

Supplier marketplaces → integration hub → Shopify/BigCommerce → your storefront

rather than:

Supplier marketplace #1 → Shopify app
Supplier marketplace #2 → Shopify app
Supplier marketplace #3 → Shopify app
...etc.

That's much more scalable if you're expecting dozens or hundreds of suppliers.

What I'd recommend

For a startup/mid-market operation:
Shopify + a marketplace/supplier integration layer is my first choice.

For a larger B2B operation with complex catalogs/pricing:
BigCommerce + integration middleware is worth serious consideration.

For enterprise with a large technical team:
Adobe Commerce + Mirakl/integration middleware gives you enormous control. Mirakl specifically has an official Adobe Commerce connector that can connect Magento to Mirakl-powered marketplaces. commercemarketplace.adobe.com

If you actually mean “we are building our own marketplace and need to onboard lots of independent suppliers”:
I'd shift the recommendation toward Mirakl rather than choosing Shopify first. Mirakl supports supplier onboarding via API, CSV, XML and EDI and says its network includes 13,000+ pre-vetted sellers. mirakl.com

If you give me 5–10 of the supplier marketplaces you need to integrate with (e.g. Faire, Alibaba, Faire, Spocket, Syncee, Mirakl marketplaces, Amazon, Walmart, etc.), I can compare Shopify vs BigCommerce vs Adobe vs WooCommerce specifically against those suppliers and tell you which has the strongest coverage.

If by “supplier marketplaces” you mean platforms where you source products from third-party suppliers—wholesale, dropship, distributor, and supplier networks—the answer is a little different from simply counting ecommerce apps.

My short answer

Shopify has the broadest supplier-app ecosystem overall. Its App Store currently has roughly 480 apps in its sourcing-options category, spanning dropshipping, wholesale, and print-on-demand. apps.shopify.com

But if your requirement is “we need to connect to lots of marketplaces and potentially build/customize integrations ourselves,” I'd strongly consider BigCommerce. Its architecture is unusually integration-friendly: it exposes APIs and a dedicated Channels Toolkit for connecting external marketplaces and channels, and its app ecosystem covers 20+ categories. docs.bigcommerce.com

There's also an important third option:

Shopify + a marketplace integration layer such as ChannelEngine can be extremely broad. ChannelEngine says its Shopify integration connects to 1,300+ marketplaces, including Amazon, Target Plus, Mercado Libre and Zalando, while synchronizing products, inventory, orders and pricing. www.channelengine.com

BigCommerce itself advertises 150+ global sales channels, and its open APIs are designed to synchronize inventory and orders with third-party channels. www.bigcommerce.com ChannelEngine's BigCommerce integration adds 950+ marketplaces and sales channels. www.channelengine.com

What I'd choose

If your business model is essentially:

“We have dozens/hundreds of suppliers, each potentially on a different marketplace/API, and we need to ingest catalogs, prices, inventory and orders.”

I'd shortlist BigCommerce + an integration/marketplace middleware layer rather than choosing an ecommerce platform purely on its native integrations.

The key question isn't really “which ecommerce platform has the most integrations?” It's “which platform has the best coverage of the specific supplier marketplaces we need?”

If you give me 5–10 of the supplier marketplaces you need to connect to (e.g. Faire, Alibaba, Faire, Spocket, Syncee, distributor APIs, specific regional marketplaces, etc.), I can compare Shopify vs BigCommerce vs WooCommerce vs Magento/Adobe Commerce against those exact suppliers and tell you which has the strongest coverage.

If by “supplier marketplaces” you mean platforms/directories where you source products or connect suppliers—rather than simply selling on Amazon/eBay/Walmart—then I’d narrow the field differently.

My shortlist

My default recommendation would be Shopify if your primary requirement is “connect me to as many different supplier sources as possible.” Shopify has a very large app ecosystem, including dedicated sourcing/dropshipping apps and supplier networks. Its current marketplace documentation lists integrations ranging from Faire and specialist marketplaces to Amazon, Walmart, eBay, Temu and others. apps.shopify.com

BigCommerce is arguably better if your operation is fundamentally multichannel. Its Channel Manager/Channels Toolkit is explicitly designed around connecting external marketplaces, and BigCommerce says its ecosystem has 1,200+ native integrations. It also supports marketplace channels including Amazon, Walmart, eBay, Target+ and Mercado Libre. docs.bigcommerce.com

Adobe Commerce is particularly compelling if you're talking about an enterprise operation with unusual suppliers and a willingness to build/commission integrations. Adobe says its marketplace has thousands of integrations/extensions, and its App Builder is designed for custom ERP, CRM, PIM and other integrations. business.adobe.com

But there's an important wrinkle: you may not actually want your ecommerce platform to have the most integrations. If you need to connect to hundreds of supplier/marketplace networks, a dedicated connectivity layer can be much more powerful. Mirakl Connect, for example, advertises hundreds of marketplace channels and pre-built connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce. www.mirakl.com

What I'd choose

• Lots of independent suppliers / dropship sources → Shopify
• Lots of sales marketplaces + sophisticated catalog/order synchronization → BigCommerce
• Large enterprise + custom supplier integrations → Adobe Commerce
• Hundreds of marketplaces specifically → Ecommerce platform + Mirakl Connect
• Lowest-cost/open ecosystem and you're comfortable with WordPress → WooCommerce

If you give me 5–10 of the supplier marketplaces you need to integrate with (e.g. Faire, Alibaba, Ankorstore, Spocket, Syncee, DSers, Mirakl marketplaces, etc.), I can make a much more definitive comparison and tell you which platform has native/prebuilt integration to the most of them, rather than relying on overall app-count claims.

If by “third-party supplier marketplaces” you mean platforms where you can source products from many different suppliers/wholesalers/dropshippers—and you need the ecommerce platform with the widest ecosystem of ready-made integrations—I’d put Shopify first.

My ranking

Why Shopify: its App Store currently has roughly 480 sourcing-option apps covering dropshipping, wholesale and print-on-demand, with integrations including Faire, CJdropshipping, DSers/AliExpress, AutoDS, Trendsi, Printful, Gelato and others. apps.shopify.com Shopify also explicitly supports connecting to suppliers outside its own ecosystem. help.shopify.com

For example, if you anticipate needing 10–30 different supplier marketplaces, Shopify is attractive because you can generally find an app/integration for each rather than building the connection yourself.

BigCommerce is the one I'd investigate alongside Shopify if you're doing something more sophisticated. Its architecture is particularly integration-friendly: its Channel Manager and APIs are designed to connect external marketplaces and sales channels, and its App Marketplace has hundreds of prebuilt integrations across 20+ categories. apps.shopify.comhelp.shopify.comdocs.bigcommerce.comexperienceleague.adobe.com

Adobe Commerce can potentially beat both for custom integrations because it's extremely extensible, but that's a different proposition—you'll generally be paying for development rather than simply installing an app. Its Marketplace provides reviewed extensions and its integration framework supports third-party systems. experienceleague.adobe.com

One important distinction

If you're talking about marketplaces such as Faire, Alibaba, AliExpress, Wholesale2B, Spocket, Syncee, Modalyst, Inventory Source, Printful, etc., I'd evaluate the platforms based on your actual supplier list, not the raw number of apps.

If you give me 5–10 supplier marketplaces you need to integrate with, I can compare Shopify vs BigCommerce vs WooCommerce vs Adobe Commerce specifically against those suppliers and tell you which has the broadest real coverage.

If by “third-party supplier marketplaces” you mean platforms where you can source products from many suppliers—dropship networks, wholesale marketplaces, vendor catalogs, and marketplace/dropship networks—the answer is a little different from simply counting ecommerce apps.

My shortlist

If your primary requirement is “connect to as many different suppliers as possible,” I'd start with Shopify—but I'd evaluate the supplier-integration layer separately from the ecommerce platform.

For example, Mirakl Connect is specifically designed to connect sellers to hundreds of marketplaces and has prebuilt connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce. www.mirakl.com It may therefore give you considerably more supplier/marketplace coverage than choosing an ecommerce platform based solely on its native integrations.

Shopify

Shopify has an enormous app ecosystem, and its marketplace tooling already supports major channels such as Amazon, eBay, Walmart and Target Plus. help.shopify.com It also has Shopify Collective, which lets retailers source products from other Shopify merchants and have supplier orders fulfilled directly. help.shopify.com

The big advantage is breadth + ease of implementation. If a particular supplier has a Shopify app/API connector, getting it operational is usually considerably easier than building a custom integration.

Shopify

Adobe Commerce

If you're talking about maximum integration flexibility rather than ease, Adobe Commerce/Magento is probably the strongest candidate. Adobe says its ecosystem has thousands of integrations and extensions, and its Marketplace supports third-party extensions that can add integrations and other functionality. business.adobe.com

There are also dedicated multichannel extensions—for example, M2E's integration can connect Adobe Commerce to Amazon, eBay, Walmart, TikTok Shop, Kaufland, Otto, OnBuy and others. commercemarketplace.adobe.com

Adobe Commerce

BigCommerce

I'd put BigCommerce particularly high if you're doing B2B / wholesale / dropship. Its architecture explicitly supports third-party marketplaces and sales channels, and its App Marketplace has hundreds of integrations across fulfillment, sales channels, accounting, marketing, etc. docs.bigcommerce.com

BigCommerce itself highlights supplier/dropshipping integrations such as Avasam and Spocket. www.bigcommerce.com

BigCommerce

The important distinction

I'd actually architect this as:

Supplier marketplaces → integration/aggregation layer → ecommerce platform → OMS/ERP

rather than expecting Shopify/Magento/BigCommerce itself to have a native connector for every supplier.

For example:

Supplier A
Supplier B
Supplier C
↓
Mirakl Connect / similar integration hub
↓
Shopify / Adobe Commerce / BigCommerce
↓
ERP + fulfillment

Mirakl explicitly supports API, EDI, CSV, XML and portal-based supplier connectivity, and its Dropship product can run marketplace and dropship operations together. www.mirakl.com

My recommendation

If you give me the actual supplier marketplaces you need to connect to—even just 10–20 names—I can make a much more useful comparison. I can build a matrix showing Shopify vs BigCommerce vs Adobe Commerce vs WooCommerce, with each supplier marked native / app / connector / API / custom development, and identify which combination gives you the widest coverage with the least custom integration work.

If your main requirement is integrating with a large number of third-party supplier marketplaces (supplier catalogs, dropship networks, B2B marketplaces, distributors, EDI/API feeds, inventory sync, order routing), the answer is usually not just the ecommerce storefront — it is the combination of:

1. Commerce platform
2. Marketplace/integration layer
3. PIM/OMS/ERP connectors

The platforms with the broadest integration ecosystems are typically:

www.shopify.comwww.bigcommerce.com

If you mean "connect to the most supplier marketplaces"

I would shortlist these:

1. Adobe Commerce (Magento) — strongest for complex supplier ecosystems

Best when you need:

• hundreds of supplier feeds
• custom pricing rules
• large catalogs
• vendor-specific workflows
• ERP/WMS integration
• custom APIs

Its advantage is flexibility: almost anything can be integrated, but you usually need developers or an implementation partner. Adobe highlights integrations through its ecosystem and extension marketplace. business.adobe.com

2. Shopify Plus — biggest ecosystem overall

Best when you want:

• many prebuilt connectors
• fast onboarding
• marketplace apps
• dropship integrations
• lower maintenance

Shopify has a very large app ecosystem, and tools like Shopify Marketplace Connect can synchronize products, listings, inventory, and orders across marketplaces such as Amazon, Walmart, eBay, and others. help.shopify.com

The limitation: very complex supplier procurement workflows often require middleware or custom apps.

3. BigCommerce — strongest "open" SaaS option

Good choice if you need:

• many integrations
• API access
• B2B purchasing workflows
• multiple storefronts
• marketplace/channel expansion

BigCommerce emphasizes a large native integration ecosystem and connections to marketplace/channel tools such as ChannelAdvisor and Feedonomics. www.shopify.comwww.bigcommerce.com

For a supplier-marketplace-heavy business, I would also evaluate integration hubs:

• ChannelEngine — connects sellers to many marketplaces
• ChannelAdvisor — enterprise marketplace management
• Feedonomics — catalog syndication
• Celigo / Boomi — middleware for ERP and supplier connections

My practical ranking for your use case

If you are building a marketplace aggregator or distributor:

1. Adobe Commerce + integration middleware
2. BigCommerce + marketplace connectors
3. Shopify Plus + connector ecosystem

If you are a DTC brand adding supplier marketplaces:

1. Shopify Plus
2. BigCommerce
3. Adobe Commerce

If you expect thousands of suppliers with different feeds/APIs/EDI formats:
Look less at the storefront and more at an OMS/PIM/integration architecture. The commerce platform becomes the customer-facing layer.

A few details would change the recommendation:

• Are these supplier marketplaces like Faire, Alibaba, Amazon Business, etc., or sales marketplaces like Amazon/eBay/Walmart?
• Do suppliers provide API feeds, EDI, CSV files, or portal-only access?
• Roughly how many suppliers (10s, 100s, 1000s)?

If your priority is integrating with a large number of third-party supplier marketplaces (not just selling on Amazon/eBay, but connecting supplier catalogs, dropship feeds, vendor portals, ERPs, PIMs, EDI networks, and marketplace APIs), the answer is usually not just the ecommerce platform—it is the combination of commerce platform + integration layer. www.shopify.cominterlinkcommerce.com

A practical ranking:

elogic.cowww.shopify.com

My recommendation by scenario

1. You need hundreds of suppliers, complex catalogs, pricing rules, inventory feeds → Adobe Commerce

• Strongest customization capabilities.
• Large ecosystem of extensions/connectors.
• Good for distributors, wholesalers, marketplaces, and multi-vendor models.
• Often paired with middleware such as Boomi, MuleSoft, Celigo, or custom APIs. elogic.cobusiness.adobe.com

2. You need the widest ready-made connector ecosystem → Shopify Plus

• Shopify has one of the largest ecommerce app ecosystems.
• Strong for connecting to marketplaces like Amazon, Walmart, eBay, TikTok Shop, Faire, and others through apps/connectors. www.shopify.com
• Less ideal if suppliers have unusual EDI/API requirements or complex wholesale rules.

3. You need an API-first backbone → commercetools

• Best if you have engineering resources and want to build a commerce operating system rather than rely on plugins.
• Excellent for many supplier integrations, but requires more technical ownership. elogic.cowww.shopify.com

4. You are a B2B distributor with many vendor feeds → consider an integration hub
Often the architecture looks like:

Supplier marketplaces / ERPs / EDI feeds
↓
Integration platform (Boomi, MuleSoft, Celigo, Patchworks, SPS Commerce, etc.)
↓
Commerce platform (Adobe, Shopify Plus, BigCommerce, etc.)
↓
Storefront

The integration hub is usually the limiting factor, not the ecommerce platform itself. www.shopify.cominterlinkcommerce.com

Short answer

• Broadest overall enterprise integration capability: Adobe Commerce
• Broadest plug-and-play marketplace/app ecosystem: Shopify Plus
• Most flexible for a custom supplier marketplace network: commercetools
• Best balance for many B2B companies: BigCommerce or Shopify Plus + middleware

If you mean “supplier marketplaces” as in dropship suppliers (like Spocket, Faire, AliExpress, wholesale catalogs) versus “marketplaces you sell on (Amazon/Walmart/eBay)”, the best choice changes significantly.