Open source payment projects
Every project in the registry tagged payment, ranked by real GitHub adoption.
Open source payment orchestrator for global transactions
AI-powered embedded AR/AP automation for platforms
可能是我用过的最优雅的 Alipay/WeChat/Douyin/Unipay/江苏银行 的支付 SDK 扩展包了
开源优雅的跨平台收款网关 GM Pay(formerly known as EPUSDT)
Real-time usage metering and billing for AI companies
PHP Payment processing library. It offers everything you need to work with payments: Credit card & offsite purchasing, subscriptions, payouts etc.
一套基于 现代 .NET 开发，支持跨平台、多商户的第三方支付SDK。
PowerWechat是一款基于WeChat SDK for Golang，支持小程序、微信支付、企业微信、公众号等全微信生态
Bypass Chromium's App-Bound Encryption via Direct Syscall-based Reflective Process Hollowing. Extract cookies, passwords, payment methods & tokens from Chrome,
Easy, cross-platform credit-card input for your React Native Project! Start accepting payment 💰 in your app today!
ACH implements a reader, writer, and validator for Automated Clearing House (ACH) files. The HTTP server is available in a Docker image and the Go package is av
Related tags
Frequently asked questions
How many open source payment projects are there?
This registry tracks 11 projects tagged payment, with 72,919 GitHub stars between them. The most-adopted is Hyperswitch at 43,615 stars.
Are these payment projects free to use?
Yes — 11 of the 11 carry an explicit open-source licence across 4 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which payment project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these payment projects still maintained?
7 of the 11 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.