Stack

Stack Auth: Streamlined Open-Source Authentication for Modern Applications

Stack Auth is an open-source platform designed to simplify user authentication and management for developers. It provides a comprehensive alternative to proprietary services like Auth0 or Clerk, offering rapid integration with Next.js, React, and JavaScript frontends, plus a versatile REST API for backend compatibility. Developers can choose between a managed cloud service or self-hosting, retaining full data control and flexibility, with initial setup completed within minutes for immediate feature access.

Features:

• SignIn & SignUp Components: Pre-built UI elements for authentication supporting OAuth, passwords, and magic links, with dark/light mode compatibility and shared development keys.
• Next.js Native APIs: Leverages server components, React hooks, and route handlers for seamless Next.js integration.
• User Management Dashboard: An administrative interface to view, filter, analyze, and modify user data.
• Self-Serve Account Settings: Allows users to manage their profiles, verify emails, and change passwords without custom development.
• Multi-Tenancy and Teams: Facilitates B2B application structures with organization management and team functionalities.
• Role-Based Access Control (RBAC): Enables defining custom permission hierarchies and assigning roles to users, including organization-specific roles.
• Third-Party OAuth Connections: Manages access tokens for external services like Google Calendar or Outlook, handling token refresh and scope.
• Passkey Authentication: Offers passwordless sign-in using biometrics or security keys across devices.
• User Impersonation: Allows administrators to log in as a user for debugging or support purposes.
• Webhook Integration: Provides notifications for user-related events, built on Svix.
• Automated Email System: Sends customizable emails for events like sign-up or password reset, featuring a WYSIWYG editor.
• Session & JWT Management: Automatically handles refresh tokens, access tokens, JWTs, and cookies for optimal performance.
• Machine-to-Machine (M2M) Auth: Secures inter-service communication using short-lived access tokens.

Summary:

Stack Auth provides a complete open-source system for implementing user authentication and comprehensive user management. It equips developers with tools for quick integration of sign-in/up flows, multi-tenancy, RBAC, and third-party OAuth. Supporting various frontends and providing a REST API, it includes features like a user dashboard and automated emails. With both managed and self-hosting options, Stack Auth prioritizes developer experience, flexibility, and data sovereignty.