Medusa

Medusa is a Node.js-based headless commerce framework offering both REST and GraphQL APIs for maximum flexibility. The platform includes customizable checkout flows, fulfillment management, order handling, and product management, all designed to stay independent from your storefront layer.

It suits development teams building custom shopping experiences who want an open-source alternative to managed platforms. Medusa's module-based architecture makes it easy to swap components (payments, fulfillment, notifications), and its active ecosystem provides plugins for extending functionality.