Stack Auth is a managed user authentication solution. It is developer-friendly and fully open-source & self-hostable. Stack gets you started in just five minutes, after which you'll be ready to use all of its features as you grow your project.
Exploring open-source auth with Stack Auth? Try Clerk for polished user UIs, Firebase for auth + backend, Descope for drag-and-drop flows, Auth0 for enterprise SSO, and PropelAuth to ship fast without boilerplate.
