Open source billing projects
Every project in the registry tagged billing, ranked by real GitHub adoption.
Transform complex usage data into accurate, real-time billing
Free online accounting for small businesses and freelancers
Comprehensive open-source business management platform
Modular auth, payments, emails, and analytics for your product
Open source metering and billing infrastructure for any pricing model
Real-time usage metering and billing for AI companies
Open Source Pricing & Packaging Infrastructure
Flexible billing infrastructure for modern SaaS
All in One PSA for MSPs, which Unifies client, contact, vendor, asset, license, domain, ssl certificate, password, documentation, file, network and location man
Simple and elegant invoicing solution.
Transform your time tracking into actionable insights
Related tags
Frequently asked questions
How many open source billing projects are there?
This registry tracks 11 projects tagged billing, with 52,017 GitHub stars between them. The most-adopted is Lago at 10,744 stars.
Are these billing projects free to use?
Yes — 9 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 billing 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 billing projects still maintained?
11 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.