supertokens
Open source alternative to Auth0 / Firebase Auth / AWS Cognito
logto-io
🧑🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.
teamhanko
Modern authentication, on your terms. Open source alternative to Auth0, Clerk, WorkOS, Stytch.
nextauthjs
Example showing how to use NextAuth.js with Next.js
cesargb
Create link for authenticate in Laravel without password or get private content