Auth0
Flexible identity platform with universal login, MFA, social connections, and enterprise SSO.
Freemium · OAuth 2.0 · 99.95% uptime
Alternatives to Clerk
Drop-in authentication and user management with pre-built UI components for React and Next.js.
2 Alternatives to Clerk
Other Authentication you can use instead of Clerk.
Firebase Auth
Google-backed auth service with email/password, phone, and social provider sign-in out of the box.
Freemium · JWT · 99.99% uptime