💡 Pick it when you want polished hosted sign-in and user management with minimal implementation.
Clerk is a modern authentication and user management platform for developers.
Starting at $0/month
Best Auth.js Alternatives ranked by AI · updated Aug 2026
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Auth.js is an open-source authentication library for JavaScript and TypeScript applications, with particularly strong integration for Next.js. It provides OAuth, email, and credential-based sign-in through configurable providers and database adapters.
Top 6 Auth.js alternatives
2
💡 Pick it for enterprise SSO, multifactor authentication, and managed identity integrations.
Auth0 provides a comprehensive platform for authentication and authorization.
Pros
- Customizable authentication flows
- Scalability
- Advanced security features
Cons
- Complex setup for some use cases
- Higher learning curve
Free tier available. Paid plans start at $23/month.
3
💡 Pick it when you want authentication tightly integrated with PostgreSQL, storage, and row-level security.
Supabase is an open-source alternative to Firebase offering real-time database and authentication services.
Pros
- Open-source
- Real-time database
Cons
- Relatively new, may have limited community support
Free tier available, paid plans based on usage
💡 Pick it when your web or mobile app already relies on Firebase and needs integrated managed authentication.
Firebase Authentication provides backend services, easy-to-use SDKs, and ready-made UI libraries to authenticate users to your app.
Free tier available, pay as you go pricing for higher usage
5
Passport
Jared Hanson and contributors
💡 Pick it when you need modular Node.js middleware and maximum control over authentication plumbing.
Passport is an open-source authentication middleware for Node.js applications. It provides a modular strategy system for local credentials, OAuth, OpenID Connect, and...
Pros
- More framework-agnostic than Auth.js and works across many Node.js servers
- Large ecosystem of authentication strategies
- Minimal runtime abstraction gives developers direct control over sessions and flows
Cons
- Provides less built-in session, callback, and framework integration than Auth.js
- Many strategies vary in maintenance quality and documentation
- You must build account-management UI and several security workflows yourself
Free, open source
💡 Pick it for open-source identity infrastructure with organizations and enterprise SSO, hosted or self-managed.
Logto is an open-source identity platform for customer and workforce applications, available as a hosted service or self-hosted deployment. It supports social...
Pros
- Offers more built-in tenant, organization, and enterprise SSO features than Auth.js
- Can be self-hosted while retaining a managed identity-platform model
- Standards-based OIDC and OAuth support works across multiple application stacks
Cons
- Adds an identity service to operate instead of keeping auth inside the application
- Smaller ecosystem and community than Auth0, Firebase, or Passport
- Self-hosting requires upgrades, monitoring, and secure deployment
Free self-hosted; cloud free tier
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