Authentication
Secure user authentication and management services providing social logins, multi-factor authentication, user permissions, and session management for modern applications.

Clerk
The easiest way to add authentication and user management to your application. Purpose-built for React, Next.js, Remix, and "The Modern Web".

Authjs
Auth.js (formerly NextAuth.js) provides secure authentication for modern web applications with support for multiple providers, JWT, sessions, and seamless integration with popular frameworks.

Supabase Authentication
Supabase Authentication provides secure user management with email, social login, magic links, phone authentication, and row-level security for building modern applications quickly.