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Clerk is an authentication and user-management platform for web and mobile applications. It provides prebuilt sign-in components, social login, multi-factor authentication, organizations, and session management for developers.
💡 Pick it for enterprise SSO, mature compliance features, and complex identity integrations.
Auth0 provides a comprehensive platform for authentication and authorization.
Free tier available. Paid plans start at $23/month.
💡 Pick it if your app already uses Firebase or needs strong native mobile SDK support.
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
💡 Pick it if you want authentication tightly coupled to an open-source PostgreSQL backend.
Supabase is an open-source alternative to Firebase offering real-time database and authentication services.
Free tier available, paid plans based on usage
💡 Pick it for a free, self-managed authentication layer with maximum control over code and infrastructure.
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...
Free, open source
💡 Pick it for AWS-native applications that need scalable identity and IAM integration at usage-based pricing.
Amazon Cognito provides authentication, authorization, and user management for web and mobile apps.
Pricing based on monthly active users
Stytch
💡 Pick it for passwordless, passkey, and embedded authentication experiences with API-level flexibility.
Stytch is an API-first authentication platform for consumer and business applications. It focuses on passwordless methods, passkeys, email and SMS flows, fraud-resistant...
Free tier; usage-based pricing
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