Open Source Projects tagged "Payments"
A curated collection of the best open source projects tagged "Payments". Each listing includes a website screenshot along with a detailed review of its features.
Open source payment orchestrator for global transactions
Stars
45,583Last commit
11 hours agoLicense
Apache-2.0
A unified payment infrastructure that connects multiple payment processors through a single API integration, enabling global payment processing
Open Source Alternative to:
Flexible e-commerce platform for modern businesses
Stars
23,492Last commit
22 hours agoLicense
BSD-3-Clause
Headless, API-first e-commerce solution with powerful features for customization, scalability, and seamless integration across channels.
Open Source Alternative to:
Modern payment infrastructure for digital products and SaaS
Stars
10,440Last commit
13 hours agoLicense
Apache-2.0
Comprehensive payment solution with built-in tax handling, automated benefits, and seamless integrations for digital product and SaaS businesses.
Open Source Alternative to:
Free online accounting for small businesses and freelancers
Stars
10,254Last commit
13 hours agoLicense
Unknown
Self-hostable accounting software covering invoicing, expense tracking, cash flow, and client portals. Free to use, available in 50+ languages.
Open Source Alternative to:
Transform complex usage data into accurate, real-time billing
Stars
10,728Last commit
13 hours agoLicense
AGPL-3.0
Open-source billing system that handles metering, usage-based pricing, and invoicing at scale. Perfect for AI, cloud, and API companies needing flexible monetization.
Open Source Alternative to:
Send invoices, accept payments, manage your business—all free
Stars
10,403Last commit
1 day agoLicense
Elastic-2.0
Free invoicing software for freelancers and small businesses. Create professional invoices, track expenses, accept online payments, and manage projects without hidden fees.
Open Source Alternative to:
Modular auth, payments, emails, and analytics for your product
Stars
6,882Last commit
12 hours agoLicense
Unknown
Self-hostable platform combining user auth, payments, email, and analytics into modular building blocks that fit around your existing product.
Open Source Alternative to:
Automate financial processes for smarter business decisions
Stars
4,019Last commit
14 hours agoLicense
AGPL-3.0
Cloud-based accounting software that streamlines bookkeeping, generates intelligent reports, and offers multi-currency support for efficient financial management.
Open Source Alternative to:
Cross-system automation and knowledge base for accounting firms
Stars
1,722Last commit
6 months agoLicense
Unknown
Connects client data across tools, automates recurring accounting workflows, and maintains a self-updating knowledge base with human approval controls.
Flexible billing infrastructure for modern SaaS
Stars
Stars growing over the last 30 days1,353Last commit
12 hours agoLicense
AGPL-3.0
Open-source pricing and billing platform that helps SaaS companies launch, test, and scale complex billing models with ease. Features metering, invoicing, and real-time data.
Open Source Alternative to:
Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
Windshift