1.goauthentik / authentik
The authentication glue you need.
- saml
- saml-idp
- saml-sp
- oauth2
- oauth2-server
- oauth2-client
- +11 more
Ranked by Attention Score: stars gained over the last 180 complete days
17 repositories by Attention Score · May 9, 2026 – Nov 4, 2026 (UTC)
The authentication glue you need.
Open Source Identity and Access Management For Modern Applications and Services
🧑🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.
The most user-friendly OpenID Connect Certified™ and OAuth 2.0 provider that lets users sign in to your applications with passkeys.
The Single Sign-On Multi-Factor portal for web apps. OpenID Certified™ and Post-Quantum Cryptography Ready.
ZITADEL - Identity infrastructure, simplified for you.
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
Internet-scale OpenID Certified™ OpenID Connect and OAuth2.1 provider that integrates with your user management through headless APIs. Solve OIDC/OAuth2 user cases over night. Consume as a service on Ory Network or self-host. Trusted by OpenAI and many others for scale and security. Written in Go.
OpenID Connect (OIDC) identity and OAuth 2.0 provider with pluggable connectors
Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network.
Open source alternative to Auth0 / Firebase Auth / AWS Cognito
OpenID Certified™ OAuth 2.0 Authorization Server implementation for Node.js
Apereo CAS - Identity & Single Sign On for all earthlings and beyond.
Streamline your web application's authentication with Polis, an SSO service supporting SAML and OpenID Connect protocols. Beyond enterprise-grade Single Sign-On, it also supports Directory Sync via the SCIM 2.0 protocol for automatic user and group provisioning/de-provisioning.
OpenAM is an open-source access management solution for identity authentication, authorization, and federation. It provides single sign-on, adaptive authentication, and centralized policy control, enabling secure access to web, mobile, and cloud applications
Goiabada is an OAuth2 / OpenID Connect server written in Go.
An OpenID Connect reference implementation in Java on the Spring platform.