Stack Auth — The open-source Auth0 alternative
Location: San Francisco, CA, USA
Industry: B2B -> Engineering, Product and Design
Tags: Developer Tools, SaaS, B2B, Identity, Open Source
YC batch: S24 | Status: Active | Team size: 2
Former names: Stack

Stack is the open-source authN, authZ, and user management platform.

We build for devs that want to iterate quickly, offering both managed auth and self-hosting. You can set it up in one minute and scale with the project as it grows.

Stack was built by repeat founders with strong technical backgrounds. Check out our GitHub: https://github.com/stack-auth/stack