goauthentik/authentik
★ 26,009 stars
Covered in week 2026-W25 · the 2026-06 report
The authentication glue you need.
What authentik is
authentik is an open-source Identity Provider (IdP) for modern SSO. It supports SAML, OAuth2/OIDC, LDAP, RADIUS, and more, designed for self-hosting from small labs to large production clusters.
From the repository README · read it on GitHub →
Transcript
Every identity provider outage locks users out of your app. Need a protocol they don't support? Wait on their roadmap. Compliance audit demands SAML but their API won't let you provision it? Your deadline, their timeline. Authentik runs the complete auth stack on your servers—SSO, MFA, user management, 200+ protocols from OAuth2 to LDAP. 22,000 stars on GitHub. Control your own identity infrastructure?