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Mailchimp Open Commerce (formerly Reaction Commerce)

Open Commerce Website | Twitter | Documentation | Discord

Mailchimp Open Commerce is an API-first, headless commerce platform built using Node.js, MongoDB, and GraphQL. It plays nicely with npm, Docker and Kubernetes.

MOC Admin


FastReturns data in split seconds, and faster queries mean faster web pages
ProvenOpen Commerce fuels sites doing 10's of thousands of orders per day with 100's of thousands of products
ComposableA flexible plugin system allows you to pick and choose which integrations work best for you
Multi-tenantHost multiple shops in the same installation
ScalableStart out with a single server and scale up to hundreds
Flexible ProductsAllows Products, with options and variants to fit a wide variety of needs
InventoryTrack inventory, allow or disallow backorders and more
ShippingIntegrate with a shipping rate provider or build your own custom table
TaxesIntegrate with a tax rate provider or build your own custom tax table
FulfillmentFlexible fulfillment system allows you create your own fulfillment methods
Order TrackingView and manage your orders in the included admin system
EmailsCustomizable templates for Order confirmations and more
OpenFully open source. Never be locked in again

Getting started

For complete documentation go to Open Commerce Quickstart for all supported operating systems.

What you need

Clone and Start the platform

git clone
cd reaction-development-platform

Behind the scenes, the make process clones all of the relevant Open Commerce software repositories, sets up each environment, and pulls, builds, and starts each Docker container.

When make completes, three services will be running on localhost:

  • Open Commerce API (port 3000), including the core plugins. This service also contains the GraphQL playground at localhost:3000/graphql.
  • Example Storefront (port 4000), which is built with Next.js.
  • Admin dashboard (port 4080), used to manage shop settings, accounts, products, and orders.

Go to the complete installation instructions to see how to set up your store

Get involved


If you like what you see, star us on GitHub.

Find a bug, a typo, or something that’s not documented well? We’d love for you to open an issue telling us what we can improve! This project uses semantic-release, please use their commit message format.

We love your pull requests! Check out our Good First Issue and Help Wanted tags for good issues to tackle. Check out our contributors guide for more information


Reaction is GNU GPLv3 Licensed