Amazon Cognito
Managed authentication and user management service in AWS
Category
Best Auth Tools for Developers
Compare pricing, learning curve, and best fit across 9 auth options.
Auth.js
Authentication library for JS frameworks (formerly NextAuth.js) — now part of the Better Auth project
Auth0
Enterprise identity platform with universal login and extensive integrations
Better Auth
TypeScript-first open-source authentication library with 40+ social providers, SSO/SAML, multi-tenancy, and 50+ plugins. All user data stays in your own database.
Clerk
Drop-in authentication with pre-built UI components and user management
Firebase Auth
Google's auth service with social login, phone auth, and anonymous auth
Keycloak
Open-source identity and access management with SSO, OAuth2, OIDC, and SAML support
Supabase Auth
Authentication service by Supabase with email, OAuth, magic links, and row-level security integration
WorkOS
Developer platform for enterprise auth features including SSO, SCIM directory sync, and audit logs