NextAuth.js
Auth
OAuth 2.0 — OAuth
Clerk | Authentication and User Management
Keycloak
Welcome | authentik
Logto: The better identity infrastructure for developers
Hanko – Open source authentication and passkey infrastructure
SuperTokens, Open Source User Authentication
Stytch - User infrastructure + passwordless authentication
Magic: Future-proof passwordless authentication
SAWO Labs | Passwordless Authentication
OneLogin: #1 Value Leader in Identity & Access Management
Auth0: Secure access for everyone. But not just anyone.
OpenID Connect | OpenID