Stack, an open-source Clerk/Firebase Auth alternative

Hey HN! Happy to finally launch Stack. We made it because we like to put apps into production quickly, and authentication & user management was taking up way too much time. We have components like and that automatically adapt to whatever theme & design system you're using. Check the blog post to see the example with Radix UI and Joy UI. Also, there's an admin dashboard for monitoring and editing accounts. Stack is 100% AGPL/MIT-licensed, so you can self-host it. Cheers!

Visit stack-auth.com ↗Alternativestop 19% of April 2024

In plain words

Stack is an open-source authentication and user management platform designed as an alternative to Clerk and Firebase Auth. It provides pre-built components like sign-in and account settings forms that automatically adapt to different design systems and themes. The tool includes an admin dashboard for account monitoring and editing, and can be fully self-hosted under AGPL/MIT licensing. Stack aims to reduce development time spent on authentication so developers can focus on building applications.

written from the facts on this page · September 2026

From the sources

In the maker’s words, at launch

Hey HN! Happy to finally launch Stack. We made it because we like to put apps into production quickly, and authentication & user management was taking up way too much time. We have components like <SignIn /> and <AccountSettings /> that automatically adapt to whatever theme & design system you're using. Check the blog post to see the example with Radix UI and Joy UI. Also, there's an admin dashboard for monitoring and editing accounts. Stack is 100% AGPL/MIT-licensed, so you can self-host it. Cheers!

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