Open source identity projects
Every project in the registry tagged identity, ranked by real GitHub adoption.
Secure, customizable identity infrastructure for developers
Secure, seamless authentication for modern applications
A certified and battle-tested identity solution
Managed identity and access management for any app
Related tags
Frequently asked questions
How many open source identity projects are there?
This registry tracks 4 projects tagged identity, with 45,555 GitHub stars between them. The most-adopted is Zitadel at 15,041 stars.
Are these identity projects free to use?
Yes — 4 of the 4 carry an explicit open-source licence across 3 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 identity 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 identity projects still maintained?
4 of the 4 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.