// the find
reactioncommerce/reaction
Project has been discontinued ////// Mailchimp Open Commerce is an API-first, headless commerce platform built using Node.js, React, GraphQL. Deployed via Docker and Kubernetes.
Mailchimp Open Commerce (formerly Reaction Commerce) was a headless, API-first e-commerce platform built on Node.js, MongoDB, and GraphQL with a plugin architecture for extensibility. It's now discontinued — Mailchimp shut it down, so this is a historical artifact, not a foundation for new projects. The 12k stars reflect its peak popularity, not its current viability.
The plugin architecture was genuinely well-designed — each plugin registers its own GraphQL schema fragments, mutations, and queries, making the system composable without forking core. The integration test suite is unusually thorough for an OSS e-commerce project, covering full checkout flows including anonymous-to-authenticated cart reconciliation. The fulfillment system was abstracted properly — shipping, tax, and payment are all pluggable interfaces rather than hardcoded integrations.
Discontinued. The description says so explicitly. Mailchimp killed the project, docs are gone or stale, and no one is fixing security issues. The tech choices have aged poorly too — MongoDB for a commerce platform means no foreign keys and no transactions for order state machines, which was always a weak spot. Node 14 requirement (per README) means you're already running an EOL runtime. Anyone building on this in 2026 is inheriting a dead codebase with known vulnerabilities and no upstream fixes coming.