saml

keycloak

+121

Open Source Identity and Access Management For Modern Applications and Services

authentik

+113

The authentication glue you need.

zitadel

+77

ZITADEL - Identity infrastructure, simplified for you.

casdoor

+68

An open-source Agent-first Identity and Access Management (IAM) /LLM MCP & agent gateway and auth server with web UI supporting OpenClaw, MCP, OAuth, OIDC, SAML, CAS, LDAP, SCIM, WebAuthn, TOTP, MFA, Face ID, Google Workspace, Azure AD

logto-io/logto

+66

🧑‍🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

caddy-security

+12

🔐 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. 🔐

apache/casbin

+12

Apache Casbin: an authorization library that supports access control models like ACL, RBAC, ABAC.

GlobalProtect-openconnect

+10

A GlobalProtect VPN client for Linux and macOS, written in Rust, based on OpenConnect and Tauri, supports SSO with MFA, YubiKey, and client certificate authentication, etc.

hanko

+6

Modern authentication, on your terms. Open source alternative to Auth0, Clerk, WorkOS, Stytch.