Assembly Line

Active Merchant

Active Merchant is a simple payment abstraction library extracted from Shopify. The aim of the project is to feel natural to Ruby users and to abstract as many parts as possible away from the user to offer a consistent interface across all supported gateways.

Active Merchant is an open-source payment library project on GitHub under the MIT license (permissive), with 4.6k stars. It is built with Ruby. Its last push was 12 days ago.

Stars
4.6k
License
MIT
Activity
Active
Latest release
v1.138.0

Code on GitHub Website

Judgement

What it is
Building block
What it does
A Ruby payment abstraction library extracted from Shopify that gives one interface to over a hundred payment gateways.
Adopt it when
Your Ruby app needs to charge cards through one or more gateways with a single API.
Watch out
Gateway adapters vary in quality, and many newer providers are better served by their own SDKs.
Ready for
Production-ready
Runs as
Library
Built with
Ruby
How established
Established: started 18 years ago, latest release v1.138.0.
What the license allows
You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-03 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Ruby

Follow it down: Active Merchant → Ruby → GCC → LLVM project → runs on a microchip

How compilers were built, back to punched paper tape

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Stars, license and activity come from GitHub and refresh on a rolling hourly schedule. The project's own description is quoted as written.