Open source identity-provider projects
Every project in the registry tagged identity-provider, ranked by real GitHub adoption.
Apereo CAS - Identity & Single Sign On for all earthlings and beyond.
OpenID Connect (OIDC) identity and OAuth 2.0 provider with pluggable connectors
Managed identity and access management for any app
Node.js library for SAML SSO
Frequently asked questions
How many open source identity-provider projects are there?
This registry tracks 4 projects tagged identity-provider, with 25,178 GitHub stars between them. The most-adopted is cas at 11,366 stars.
Are these identity-provider projects free to use?
Yes — 4 of the 4 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 identity-provider 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-provider 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.