Open source invoices projects
Every project in the registry tagged invoices, ranked by real GitHub adoption.
Transform complex usage data into accurate, real-time billing
Send invoices, accept payments, manage your business—all free
Free online accounting for small businesses and freelancers
Comprehensive open-source business management platform
AI-powered embedded AR/AP automation for platforms
Self-hosted AI accounting app. LLM analyzer for receipts, invoices, transactions with custom prompts and categories
Simple and elegant invoicing solution.
Related tags
Frequently asked questions
How many open source invoices projects are there?
This registry tracks 7 projects tagged invoices, with 56,287 GitHub stars between them. The most-adopted is Lago at 10,748 stars.
Are these invoices projects free to use?
Yes — 5 of the 7 carry an explicit open-source licence across 2 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 invoices 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 invoices projects still maintained?
6 of the 7 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.