Stack Auth

Stack Auth is a fully open-source, developer-friendly authentication and authorization platform designed as an alternative to Auth0 and Clerk. It offers managed or self-hosted options with no vendor lock-in and supports Next.js frontends via components and hooks, along with a REST API for other languages. Key features include authentication components (OAuth, password credentials, magic links), user dashboard, account settings, organizations and teams management, role-based access control (RBAC), OAuth token management for third-party APIs, passkeys for passwordless login, impersonation, webhooks, customizable automatic emails, and machine-to-machine authentication. Stack Auth emphasizes deep integration with the tech stack, ease of setup, and comprehensive user management for startups and side projects.

platform:web platform:nextjs platform:react pricing:freemium pricing:paid pricing:free pricing:subscription language:javascript language:typescript form:web-app form:api form:saas feature:authentication feature:authorization feature:user-management feature:impersonation feature:webhooks feature:oauth feature:multi-factor-authentication feature:passkeys feature:role-based-access feature:teams-management feature:oauth-token-management feature:automatic-emails feature:machine-to-machine-authentication target:developers target:startups target:teams