PPlatformAppStores

Ecommerce & storefront platforms

Ecommerce app marketplaces are where developers reach merchants who are actively looking to add functionality to their stores — subscriptions, reviews, upsells, shipping, tax, marketing automation, and more. Because the buyer is a business owner losing revenue to every gap in their stack, willingness to pay is high and distribution is built into the host platform.

The dominant model is the embedded app: your product renders inside the merchant admin (and sometimes the storefront) using the platform’s UI framework and APIs. Auth is almost always OAuth 2.0 at the shop level, with webhooks for order, product, and app-lifecycle events. Most stores take a revenue share on paid apps and run a listing review that checks performance, privacy, and API usage before you go live.

If you are deciding where to build first, weigh the size of the merchant base against review strictness and revenue share. Shopify has the largest paying audience and the most demanding “Built for Shopify” bar; WooCommerce and Magento trade central distribution for open, self-hostable extensibility.

Marketplaces in ecommerce & storefront platforms

11 listed

BigCommerce Apps

BigCommerce Inc.

Ecommerce

Marketplace for apps that extend BigCommerce storefronts, checkout, and merchant back-office workflows.

Onboarding$0
Commission0% direct; developer bills separately
Moderate· L2
Ecommerce

Duda’s marketplace for third-party apps and services that extend Duda websites with forms, chatbots, accessibility, SEO, marketing, booking, and analytics.

OnboardingNot publicly specified
CommissionNot publicly specified
Moderate· L2

Ecwid App Market

Lightspeed Commerce Inc.

Ecommerce

Ecwid by Lightspeed's App Market, where developers publish OAuth-based embedded apps and connectors to embedded and omnichannel SMB stores.

Onboarding$0 (partner contract required)
CommissionEcwid pays developers 80% of net app revenue (roughly a 20% take)
Advanced· L3
Ecommerce

Extension marketplace for Adobe Commerce (Magento) storefronts, spanning self-hosted and cloud deployments.

Onboarding$0
Commission30% on Marketplace extension sales
Advanced· L3
Ecommerce

A marketplace for discovering certified third-party and NetSuite-built applications that extend NetSuite functionality.

OnboardingNot publicly specified
CommissionNot publicly specified
Advanced· L3

PrestaShop Addons

PrestaShop SA

Ecommerce

The official marketplace for the self-hosted open-source PrestaShop platform, selling PHP modules and themes that install directly into merchants' stores.

Onboarding€99 per addon, valid 12 months
CommissionSellers earn roughly 60–83% of each sale ex-tax depending on channel
Advanced· L3

Shopify App Store

Shopify Inc.

Ecommerce

The leading marketplace for apps that extend online stores, checkout, merchandising, and merchant operations.

Onboarding$0
Commission0% on first $1M; 15% after
Moderate· L2
AI agents
Ecommerce

Square App Marketplace is Square’s official catalog for discovering third-party apps that connect with Square seller accounts across payments, commerce, retail, restaurants, and business operations.

OnboardingNot publicly specified
CommissionNot publicly specified
Advanced· L3

Squarespace Extensions

Squarespace, Inc.

Ecommerce

Squarespace's curated marketplace of OAuth-authenticated third-party connectors — shipping, fulfillment, inventory, and marketing services that plug into Squarespace Commerce stores.

Onboarding$0 to apply (approval required)
CommissionNo first-party rev-share; developers bill customers on their own platform
Advanced· L3

Wix App Market

Wix.com Ltd.

Ecommerce

Wix's built-in app store where developers publish OAuth-based embedded apps and widgets to a large base of website and store owners.

Onboarding$0
Commission0% for the first year, then an 80/20 split favoring the developer (after a 2.5% transaction fee)
Advanced· L3
Ecommerce

WordPress-native extension marketplace for stores built on WooCommerce.

Onboarding$0
Commission35-45% on Marketplace sales depending on category
Moderate· L2

Frequently asked questions

Which ecommerce & storefront platforms are in this directory?

11 marketplaces: BigCommerce Apps, Duda App Store, Ecwid App Market, Magento Marketplace, NetSuite SuiteApp Marketplace, PrestaShop Addons, Shopify App Store, Square App Marketplace, Squarespace Extensions, Wix App Market, WooCommerce Marketplace.

What authentication models do ecommerce & storefront platforms use?

Most use OAuth 2.0, , API key. OAuth 2.0 is the norm for public, multi-tenant apps; API keys and personal access tokens are common for single-account integrations.

How many require a security review before listing?

10 of 11 require a formal security or listing review before an app goes live. 1 explicitly support AI agents or bots.