Open-source alternatives to Clerk

3 projects you can self-host, audit and use for free — ranked by community votes.

1. 1

   Auth.js

   NextAuth-era library inside your own app

   Clerk vs Auth.js
2. 2

   Better Auth

   Open-source TypeScript auth you run yourself

   Clerk vs Better Auth
3. 3

   Keycloak

   Self-hosted SSO for teams that need an IdP

   Clerk vs Keycloak

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