1.goauthentik / authentik
The authentication glue you need.
- saml
- saml-idp
- saml-sp
- oauth2
- oauth2-server
- oauth2-client
- +11 more
+3,110 stars
from 23,123 · score 8.04
Trending repositories
Ranked by Attention Score: stars gained over the last 90 complete days
18 repositories by Attention Score · Aug 7, 2026 – Nov 4, 2026 (UTC)
2.keycloak / keycloak
Open Source Identity and Access Management For Modern Applications and Services
- keycloak
- oidc
- saml
+1,776 stars
from 35,928 · score 7.48
3.pocket-id / pocket-id
The most user-friendly OpenID Connect Certified™ and OAuth 2.0 provider that lets users sign in to your applications with passkeys.
+1,339 stars
from 8,663 · score 7.20
4.authelia / authelia
The Single Sign-On Multi-Factor portal for web apps. OpenID Certified™ and Post-Quantum Cryptography Ready.
- totp
- ldap
- sso-authentication
- two-factor-authentication
- docker
- kubernetes
- +14 more
+1,113 stars
from 28,401 · score 7.02
5.zitadel / zitadel
ZITADEL - Identity infrastructure, simplified for you.
- saml
- authentication
- authorization
- login
- oidc
- sso
- +11 more
+913 stars
from 14,595 · score 6.82
6.casdoor / casdoor
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
+697 stars
from 14,060 · score 6.55
7.logto-io / logto
🧑🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.
- authentication
- authorization
- identity
- openid-connect
- passwordless
- social-login
- +14 more
+644 stars
from 14,198 · score 6.47
8.dexidp / dex
OpenID Connect (OIDC) identity and OAuth 2.0 provider with pluggable connectors
- oidc
- kubernetes
- idp
- identity-provider
- hacktoberfest
+248 stars
from 10,985 · score 5.52
9.ory / hydra
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.
- hydra
- oauth2
- openid-connect
- docker
- server
- security
- +14 more
+215 stars
from 17,432 · score 5.38
10.ory / kratos
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.
- identity
- identity-management
- user-management
- users
- user
- login
- +5 more
+175 stars
from 13,773 · score 5.17
11.supertokens / supertokens-core
Open source alternative to Auth0 / Firebase Auth / AWS Cognito
- authentication
- session-management
- login
- supertokens
- java
- signin
- +13 more
+148 stars
from 15,194 · score 5.00
12.panva / node-oidc-provider
OpenID Certified™ OAuth 2.0 Authorization Server implementation for Node.js
- openid
- oidc
- openid-provider
- openid-connect
- connect
- server
- +4 more
+68 stars
from 3,779 · score 4.23
13.apereo / cas
Apereo CAS - Identity & Single Sign On for all earthlings and beyond.
- sso-authentication
- authentication
- authorization
- java
- websso
- saml2
- +14 more
+57 stars
from 11,337 · score 4.06
14.OpenIdentityPlatform / OpenAM
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
- openam
- sso
- oauth
- saml
- aaa
- authentication
- +14 more
+23 stars
from 879 · score 3.18
15.ory / polis
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.
- enterprise-software
- saml
- saml2
- saml-service-provider
- saml-authentication
- sso
- +14 more
+22 stars
from 2,249 · score 3.14
16.leodip / goiabada
Goiabada is an OAuth2 / OpenID Connect server written in Go.
- identity-management
- oauth2
- openid-connect
- user-management
- authentication
- authorization
- +7 more
+5 stars
from 199 · score 1.79
17.mitreid-connect / OpenID-Connect-Java-Spring-Server
An OpenID Connect reference implementation in Java on the Spring platform.
+3 stars
from 1,504 · score 1.39
18.Aguafrommars / TheIdServer
OpenID/Connect, OAuth2, WS-Federation and SAML 2.0 server based on Duende IdentityServer and ITFoxtec Identity SAML 2.0 with its admin UI
- openid-connect
- admin-ui
- iam
- openid
- oidc
- oidc-server
- +12 more
+1 stars
from 754 · score 0.69