Stack Auth is an open-source Clerk/Auth0 alternative that offers managed user authentication. Developer-friendly and fully open-source, Stack Auth provides easy setup in just five minutes. You can export user data and self-host for free at any time. Some unique features include SignIn and SignUp components, multi-tenancy, role-based access control, OAuth connections, impersonation, webhooks, and automatic emails. It also handles user sessions, JWTs, and M2M authentication. The tool supports Next.js frontends and REST APIs. To contribute or set up Stack Auth, follow the provided documentation and join the community on Discord. Make sure to run required dependencies and follow contribution guidelines carefully.
https://github.com/stack-auth/stack