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Stack Auth

Y Combinator LogoS24
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https://stack-auth.com

The open-source Auth0 alternative

Stack is the open-source authN, authZ, and user management platform. We build for devs who 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

Stack Auth
Founded:2024
Team Size:2
Location:
Group Partner:Dalton Caldwell
   

Active Founders

Konstantin Wohlwend, Founder

I build user authentication @ Stack. If you're building a modern web app with user logins, we should chat! https://n2d4.github.io 👋

Konstantin Wohlwend
Konstantin Wohlwend
Stack Auth
  

Zai Shi, Founder

Building the best user login/management experience for developers, 100% open-source!

Zai Shi
Zai Shi
Stack Auth
  

Company Launches

Stack Auth — Open-source user authentication that doesn't suck

Docs: https://docs.stack-auth.com
Star us on GitHub: https://github.com/stack-auth/stack

Hi all! We're Zai and Konsti, and we’re repeat founders who believe that devtools must be dev-friendly.

User authentication sucks. Existing solutions are a pain to set up and have hostile pricing, terrible documentation, and vendor lock-in. The few good solutions that exist only do authentication and don't even touch authorization or user management.

Stack Auth was born out of years of frustration. We wanted to build something better.

If you're building B2B software, we'll deal with organizations, permissions, and RBAC for you.

If you're building a Next.js app, we have React components for sign-in, password reset flows, and all sorts of things like account settings and teams. And they're customizable.

Other features include:

  • 100% open-source and self-hostable, though we also provide a Cloud service
  • User dashboard to view, modify, and understand your users
  • Multi-tenancy for your business customers
  • Access token management for APIs of OAuth services that users connect with
  • Impersonation to log in as one of your own customers for debugging and live support
  • Webhooks to sync your data with other systems like databases or Slack
  • Customizable e-mails on triggers such as user sign-up
  • Flexible REST API for use with any backend

Interested? Check out our website or schedule a call. Or take a look at the screenshots below.

Thanks all!