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MedusaJS — The Open-Source Commerce Platform

The #1 open-source commerce platform on GitHub. A modular, headless commerce engine deployed and extended by Apeiron for merchants who need to own every workflow.

MedusaJS — The Open-Source Commerce Platform

MedusaJS — The Open-Source Commerce Platform, deployed by Apeiron

The #1 open-source commerce platform on GitHub. Extend, customize, and own every commerce workflow.

At a glance

  • Category: Headless E-commerce
  • License: MIT, self-hosted or Medusa Cloud
  • Technology stack: TypeScript, Node.js, PostgreSQL, Redis, Next.js storefront
  • Website: medusajs.com

MedusaJS — the modern commerce platform MedusaJS — open-source commerce for developers and agents.

Why we chose Medusa

Most SaaS e-commerce platforms lock you into their data model, their checkout, their pricing rules. Medusa flips that: a modular, headless commerce engine you deploy yourself, extend in TypeScript, and integrate into any front-end — Next.js, mobile app, POS, marketplace, in-store kiosk.

For merchants who outgrow Shopify or need multi-region, multi-warehouse, multi-brand setups without paying platform fees on every order, Medusa is the most mature open-source alternative on the market.

What Medusa gives you out of the box

  • Products, variants, collections, categories with rich metadata.
  • Cart, checkout, orders, payments, fulfilment as composable modules.
  • Promotions, price lists, tax regions, sales channels — the primitives you would otherwise rebuild.
  • Admin dashboard for merchandising, orders, customers, discounts.
  • Storefront starter (Next.js 15) plus a fully typed JavaScript SDK.

Modules — advanced commerce logic for any use case Modules, Admin, Framework and Infrastructure — Medusa is a platform, not just a library.

Framework built for customization

Medusa is not a shrink-wrapped product; it is a framework. Every workflow is a first-class TypeScript function you can override. Every module has a public API. That means:

  • Custom pricing engines (B2B contracts, staff discounts, dynamic bundles).
  • ERP / OMS / WMS integrations wired as native modules — no brittle middleware.
  • Domain-specific data models (rentals, subscriptions, digital goods, marketplaces).
  • Agent-ready endpoints so AI assistants can query and mutate commerce data safely.

Agent tools — commerce guardrails for AI assistants Guardrails for agents to build customizations safely on top of the store.

How Apeiron delivers it

  1. Discovery & catalog modelling. We map your products, options, price lists, regions, warehouses. We define the checkout you actually need.
  2. Deployment. Self-hosted on your cloud (AWS, GCP, Scaleway, OVH) or on Medusa Cloud. Postgres + Redis + workers + admin — production-grade, observability included.
  3. Storefront. Next.js storefront tailored to your brand, or headless integration into an existing site / mobile app.
  4. Payments & logistics. Stripe, Adyen, Mollie, local providers, Flouci; shipping via UPS, Chronopost, in-house couriers, click & collect.
  5. ERP / PIM / CRM integration. Bi-directional sync with ERPNext, Odoo, Twenty CRM, Akeneo, Sage.
  6. Custom modules. B2B quoting, subscriptions, marketplaces, loyalty — built as first-class Medusa modules, not bolt-ons.
  7. Operate & evolve. SLA support, quarterly upgrades, performance and conversion audits.

Who it is for

  • DTC brands that outgrew Shopify Plus and want to stop paying platform fees.
  • Marketplaces needing multi-vendor logic Shopify cannot express.
  • B2B merchants with contract pricing, quotes, credit terms, PO-based checkout.
  • Retailers unifying online, in-store POS and mobile behind one commerce engine.

Why teams choose Medusa with Apeiron

  • You own the code, the data, the infrastructure. No vendor lock-in.
  • Open-source foundation — 35k+ GitHub stars, active community, MIT license.
  • TypeScript everywhere — one language from database to storefront.
  • Apeiron delivery — an experienced squad that has shipped ERP, mobile and CRM in production for retail and manufacturing clients.

Let us build your commerce platform