Medusa

Medusa is an open-source commerce platform designed for developers and AI agents, recognized as the number one open-source commerce platform on GitHub. The platform provides modular commerce logic through its Modules system, covering cart, order, payment, fulfillment, product, customer, promotion, inventory, and pricing domains. Each module exposes TypeScript types and can be customized or replaced without modifying the core framework. The Framework layer introduces guardrails that enable AI agents to safely build customizations using guided workflows, with MCP (Model Context Protocol) support for programmatic interaction. The Admin dashboard is fully customizable with React, providing visual management of orders, inventory, customers, promotions, and analytics. Medusa supports both B2C and B2B commerce workflows including multi-warehouse fulfillment across 10+ 3PL providers, distributor-to-customer order handling, account-based pricing, quote management, and purchase orders. The platform has been adopted by major brands including Heineken, Mitsubishi, Redington, and Eight Sleep. Notable AI implementations include an AI-powered email-to-order flow that delivered 80 percent cost savings and automated over 4 billion dollars in digital sales through B2B portals. Medusa Cloud provides managed infrastructure with push-from-GitHub deployments, CLI tools, development agents, preview environments, and automatic scaling. Pricing starts at 29 dollars per month for the Cloud plan with open-source self-hosting available at no cost under the MIT license.