Stack Auth

Stack Auth is an open-source suite of tools for authentication and user management, designed to get you up and running in minutes. It provides a complete solution for your login and signup pages, offering a powerful alternative to closed-source services.

Seamlessly integrate a wide range of authorization features adapted to your needs:

• Organizations & Teams: Manage B2B customers with support for email invitations and team management tools.
• Permissions & RBAC: Define granular permission trees and organization-wide roles for precise access control.
• 3rd-Party OAuth: Connect to third-party APIs like Gmail or OneDrive without managing complex OAuth flows or token refreshes.

Choose your integration style. Use the beautifully styled, pre-built shadcn/ui components to get started quickly, or build your own custom interface with the headless SDK. The platform also includes a robust REST API, user impersonation for debugging, automatic JWT management, and webhooks to sync with any other service.