Stack Auth is described as 'Stack is an open-source, self-hostable, and highly customizable authentication and user management system' and is a identity management tool in the development category. There are more than 25 alternatives to Stack Auth for a variety of platforms, including Web-based, SaaS, Self-Hosted, Android and Docker apps. The best Stack Auth alternative is VoidAuth, which is both free and Open Source. Other great apps like Stack Auth are Authelia, Keycloak, ZITADEL and AuthKit.
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