base / commerce-payments

Onchain authorization and capture for trust-minimized commerce.

juspay / hyperswitch

Open source, composable payments platform | PCI compliant | SaaS and Self-host options | Enables connectivity to multiple payment, payout, fraud, vault and tokenization providers | Uplifts authorization with intelligent routing and revenue recovery | Reduce payment processing costs with cost observability | Reduces payment ops with reconciliation

saleor / saleor

Saleor Core: the high performance, composable, headless commerce API.

wasp-lang / open-saas

A 100% free modern JS SaaS boilerplate (React, NodeJS, Prisma). Full-featured: Auth (email, google, github, slack, MS), Email sending, Background jobs, Landing page, Payments (Stripe, Polar.sh), Shadcn UI, S3 file upload. AI-ready with tailored AGENTS.md, skills, and Claude Code plugin. One cmd deploy. Powered by Wasp full-stack framework.

OpenByteInc / QuantDinger

Open-source AI Trading OS, agent trading, and vibe trading, with Jev System One integration. Research, build Python strategies, backtest, and paper/live trade across crypto, stocks, and forex. Launch your own multi-tenant trading SaaS with built-in user management, billing, payments, and settlement.

getlago / lago

Open Source Metering and Usage Based Billing API ⭐️ Consumption tracking, Subscription management, Pricing iterations, Payment orchestration & Revenue analytics

polarsource / polar

Polar — A billing platform for the intelligence era

invoiceninja / invoiceninja

A source-available invoice, quote, project and time-tracking app built with Laravel

akaunting / akaunting

Online Accounting Software

lightningnetwork / lnd

Lightning Network Daemon ⚡️

btcpayserver / btcpayserver

Accept Bitcoin payments. Free, open-source & self-hosted, Bitcoin payment processor.

Laravel-Lang / lang

List of 128 languages for Laravel Framework, Laravel Jetstream, Laravel Fortify, Laravel Breeze, Laravel Cashier, Laravel Nova and Laravel UI.

hexclave / hexclave

The user infrastructure platform. You choose the frontend, backend, and database. Hexclave handles everything else.

x402-foundation / x402

A payments protocol for the internet. Built on HTTP.

BlockRunAI / ClawRouter

The agent-native LLM router for autonomous agents. Every frontier model behind one wallet, <1ms local routing, USDC payments on Base & Solana via x402.

killbill / killbill

Open-Source Subscription Billing & Payments Platform

bigcapitalhq / bigcapital

💵 Independent financial accounting with intelligent reporting, alternative to Quickbooks, Xero, Wave.

InvoicePlane / InvoicePlane

A self-hosted open source application for managing your invoices, clients and payments.

alsk1992 / CloddsBot

Open Source AI trading agent that operates autonomously across 1000+ markets - Polymarket, Kalshi, Binance, Hyperliquid, Solana DEXs, 5 EVM chains. Scans for edge, executes instantly, manages risk while you sleep. Agent commerce protocol for machine-to-machine payments. Self-hosted. Built on Claude.

talivia-group / talivia

Open-source, self-hosted revenue-first analytics for founders: web analytics, Session Replay, revenue attribution, and customer revenue integrations. datafast alternative

pay-rails / pay

Payments for Ruby on Rails apps

tourmind-com / Tourmind-Booking-Skills

AI agent skills for end-to-end hotel and flight booking—compare live hotel rates across leading OTAs and suppliers, search and verify real-time airfares worldwide, book stays and flights, and manage reservations, hotel cancellations, and payments via the TourMind API.

Payum / Payum

PHP Payment processing library. It offers everything you need to work with payments: Credit card & offsite purchasing, subscriptions, payouts etc.

youpi-pg / YouPI-PG

A self-hosted UPI & COD payment gateway with zero per-transaction platform fees, universal JavaScript checkout integration, dynamic QR payments, WhatsApp OTP authentication, and automated payment verification.

solana-foundation / pay

CLI for Agentic payments (x402, MPP, AP2).

dj-stripe / dj-stripe

dj-stripe automatically syncs your Stripe Data to your local database as pre-implemented Django Models allowing you to use the Django ORM, in your code, to work with the data making it easier and faster.

OpenBankProject / OBP-API

An open source RESTful API platform for banks that supports Open Banking, XS2A, PSD2 and Open Finance through access to accounts, transactions, counterparties, payments, entitlements and metadata - plus a host of internal banking and management APIs.

FOSSBilling / FOSSBilling

Empower your hosting business with FOSSBilling, the free and open-source solution for efficient billing and client management.

stripe / stripe-react-native

React Native library for Stripe.

ZeusLN / zeus

A mobile Bitcoin wallet fit for the gods. ⚡️ Est. 563345

juspay / hyperswitch-prism

One library | Many payment processors | Scale to multiple processors with few lines of code.

kdeldycke / awesome-billing

💰 Billing & Payments knowledge for cloud platforms

ACINQ / eclair

A scala implementation of the Lightning Network.

meteroid-oss / meteroid

Open-source Pricing and Billing Infrastructure 🚀 Subscription management, Invoicing, Pricing, Usage-based billing, Cost limiting, Grandfathering, Experiments, Revenue analytics & Actionable insights

mikehasa / golive-skill

Take your agent-built product live: hosting, database, domain, email, payments — on your own accounts. Open-source Agent Skill + zero-dependency Node CLI: detect → plan → approve → apply → verify. No GoLive account, backend or telemetry.

jazzband / django-payments

Universal payment handling for Django.

mobilecoinfoundation / mobilecoin

Private payments for mobile devices.

blendbyte / laravel-paypal

PayPal REST API client for Laravel and standalone PHP.

getpaykit / paykit

Build Stripe billing without the glue code. Products in code, webhooks handled, billing state in your app.

tempoxyz / tempo

the blockchain for payments

bitcart / bitcart

Bitcart is a free and open-source self-hosted payment processor for BTC, LTC, BCH, XMR, ETH, TRX, USDT and more

ACINQ / phoenix

Phoenix is a self-custodial Bitcoin wallet using Lightning to send/receive payments.

Snaplii-Inc / agent-to-merchant-payments

Payments are broken for AI agents. Snaplii provides a secure, tokenized payment layer that enables AI agents to transact in the real world — without exposing users' underlying payment credentials.

Ride-The-Lightning / RTL

Ride The Lightning - A full function web browser app for LND, C-Lightning and Eclair

Marve10s / Better-Fullstack

Scaffold production-ready full-stack apps in TypeScript, Rust, Python, Go, and Java with a visual builder and CLI. Choose your frontend, backend, database, auth, AI, payments, and DevOps integrations, all wired together.

VonHoltenCodes / SlowBooks-Pro-2026

Free, source-available accounting: double-entry bookkeeping, invoicing, US payroll, inventory, bank feeds - desktop app with built-in multi-user Server Edition (no Docker needed). A QuickBooks replacement. No cloud, no caps.

Glench / ExtPay

The JavaScript library for ExtensionPay.com — payments for your browser extensions, no server needed.

invoicerr-app / invoicerr

Invoicerr is a freelance-focused invoicing app that lets you create quotes, generate invoices, track payments, and collect secure signatures.

recurly / recurly-js

Simple subscription billing in the browser

Steffo99 / greed

Customizable, multilanguage Telegram shop bot with Payments support

velobase / velobase-harness

All AI developers deserve to get paid. Turn your AI prototype into a paid SaaS with open-source infrastructure for usage billing, payments, attribution, affiliates, anti-abuse, and deployment.

WICG / webmonetization

Proposed Web Monetization standard

TareqMonwer / Django-School-Management

Transform your school with our intuitive Django School Management System. Seamlessly manage payments, simplify e-admissions, and track results effortlessly, all through a user-friendly interface. Developed using Python Django, our comprehensive system enhances your school's efficiency. Experience the future of education management today.

nymtech / nym-vpn-client

Cross-platform open source VPN client built in Rust, with mixnet anonymity and WireGuard speed. Protects metadata, not just IP addresses. Zero-knowledge payments for unlinkable online activities.

Sidiora-Labs / Paxeer-X-Network

Paxeer X is a Distributed HyperState Machine for payments, code execution and intent routing. Designed for Machines and the Users operating them.

ledgersmb / LedgerSMB

Double-entry accounting & ERP for the web

zonelessdev / zoneless

Open-source Stripe alternative for stablecoins. Checkout, subscriptions, and marketplace payouts. Stripe-compatible API. Your very own payments stack with no fees.

BlockRunAI / Franklin

The AI agent with a wallet — spends USDC autonomously to get real work done. Apache-2.0, TypeScript.

interledger / open-payments

Protocol to setup payments between entities on the Web based on GNAP

braintree / braintree_php

Braintree PHP library