Best Authentication & Identity GitHub Repositories

Open-source SaaS Starter with User Roles, Organizations & Admin Panel. Built using Next.js 16, Better Auth, Drizzle, Neon, Fumadocs, Shadcn/ui, Stripe, Server Actions.

An authorization library that supports access control models like ACL, RBAC, ABAC in Java

FreeRADIUS - A multi-protocol policy server.

Build, run and scale AI agents like API and microservices

Security engine for Java (authentication, authorization, multi frameworks): OpenID Connect, SAML2, CAS, OAuth, LDAP, JWT...

General Rack Authentication Framework

OAuth 2.0 social authentication providers for ASP.NET Core

Unofficial Firebase Admin SDK for PHP

One Time Password (OTP) / 2FA for Node.js and Browser - Supports HOTP, TOTP and Google Authenticator

React native bridge for AppAuth - an SDK for communicating with OAuth2 providers

🔐 Authentication, Authorization, and Accounting (AAA) App and Plugin for Caddy v2. 💎 Implements Form-Based, Basic, Local, LDAP, OpenID Connect, OAuth 2.0 (Github, Google, Facebook, Okta, etc.), SAML Authentication. MFA/2FA with App Authenticators and Yubico. 💎 Authorization with JWT/PASETO tokens. 🔐

You're the boss, agents are your team. They handle tasks on their own, message each other, and review each other's work. You just watch the kanban board and give high-level commands. Codex/Claude/OpenCode/Cursor/Grok/GitHub/Kiro/Z.AI/Xiaomi/MiniMax/Kimi(300+ models, 200+ LLM providers, free models no auth) Build your AI company with multiple teams

Ruby's Most Advanced Authentication Framework

OAuth-enabled curl for the Twitter API

Backend controllers and scaffolding for Laravel authentication.

Official JavaScript repository for Clerk authentication

Passkeys, FIDO2 and WebAuthn .NET library.

Google Auth Library for PHP

Atmos is the open-source runtime for infrastructure — it builds, authenticates, and ships Terraform, OpenTofu, Packer, Ansible, Kubernetes, Helm, and containers the same way on your laptop, in CI, and with AI agents.

Single Sign-On Identity & Access Management via OpenID Connect, OAuth 2, PAM