Single sign-on (SSO)

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Single sign-on (SSO) is an authentication scheme that allows a user to log in with a single ID to any of several related, yet independent, software systems. SSO supporters place emphasis on it reducing the risk of password fatigue and improvement of usability in terms of perceived corperate identity between different services of the same provider.

Conversely,single sign-off orsingle log-out (SLO) is the property whereby a single action of signing out terminates access to multiple software systems.

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authelia /authelia

Star23.1k

The Single Sign-On Multi-Factor portal for web apps

docker kubernetes golang security ldap oauth2 authentication push-notifications u2f yubikey two-factor totp sso openid-connect mfa two-factor-authentication sso-authentication 2fa multifactor webauthn

UpdatedMar 18, 2025
Go

tailscale /tailscale

Star21.6k

The easiest, most secure way to use WireGuard and 2FA.

oauth vpn sso 2fa wireguard tailscale

UpdatedMar 18, 2025
Go

casbin /casbin

Sponsor

Star18.3k

An authorization library that supports access control models like ACL, RBAC, ABAC in Golang:https://discord.gg/S5UjpzGZjN

oauth saml authentication iam acl auth authorization cas permission rbac sso oidc access-control abac authz authn cloudsecurity casbin cloudos casdoor

UpdatedMar 18, 2025
Go

dromara /Sa-Token

Sponsor

Star17.2k

一个轻量级 Java 权限认证框架，让鉴权变得简单、优雅！—— 登录认证、权限认证、分布式Session会话、微服务网关鉴权、单点登录、OAuth2.0

java authorization sso token springcloud aouth2

UpdatedMar 14, 2025
Java

ory /hydra

Star15.9k

The only web-scale, fully customizable OpenID Certified™ OpenID Connect and OAuth2 Provider in the world. Become an OpenID Connect and OAuth2 Provider over night. Written in Go, cloud native, headless, API-first. Available as a service on Ory Network and for self-hosters. Relied upon by OpenAI and others for web-scale security.

docker security identity oauth oauth2 cloud server oauth2-provider authorization hydra sso openid oauth2-server openid-connect oauth-provider openid-provider federation oidc hacktoberfest openid-connect-provider

UpdatedMar 17, 2025
Go

goauthentik /authentik

Star15.3k

The authentication glue you need.

kubernetes security saml oauth2 authentication proxy reverse-proxy authorization sso oauth2-server oidc oauth2-client oidc-provider oidc-client saml-idp saml-sp authentik

UpdatedMar 18, 2025
Python

casdoor /casdoor

Sponsor

Star11.2k

An open-source UI-first Identity and Access Management (IAM) / Single-Sign-On (SSO) platform with web UI supporting OAuth 2.0, OIDC, SAML, CAS, LDAP, SCIM, WebAuthn, TOTP, MFA, Face ID, RADIUS, Google Workspace, Active Directory and Kerberos

ldap oauth saml authentication iam auth radius totp sso kerberos payment-gateway oidc mfa scim single-sign-on authn casbin faceid webauthn casdoor

UpdatedMar 16, 2025
Go

apereo /cas

Star11k

Apereo CAS - Identity & Single Sign On for all earthlings and beyond.

java open-source aws oauth2 spring-boot authentication spring-cloud openidconnect authorization fido sso saml2 ldap-authentication spring-framework identity-provider mfa sso-authentication websso spring-webflow duosecurity

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Java

oauth2-proxy /oauth2-proxy

Star10.7k

A reverse proxy that provides authentication with Google, Azure, OpenID Connect and many more identity providers.

ssl cloud-infrastructure sso oauth2-proxy hacktoberfest

UpdatedMar 17, 2025
Go

zitadel /zitadel

Star10k

ZITADEL - Identity infrastructure, simplified for you.

identity saml oauth2 authentication login authorization sso user openid-connect oidc mfa scim multitenancy 2fa fido2 passkeys

UpdatedMar 17, 2025
Go

logto-io /logto

Sponsor

Star9.7k

🧑‍🚀 An identity and access management (IAM) infrastructure with authentication, authorization, MFA, SSO, user management, and multi-tenancy features. Supports OAuth 2.0, OIDC, and SAML. No framework restrictions.

identity jwt oauth2 typescript signup authentication login email sms password auth authorization totp rbac sso openid-connect social-login mfa passwordless logto

UpdatedMar 18, 2025
TypeScript

teamhanko /hanko

Star7.7k

The Complete Authentication and User Management Solution for the Passkey Era. Open Source Alternative to Clerk, Auth0, et al.

oauth jwt saml authentication user-management sso passwordless 2fa ciam webauthn fido2 sign-in-with-apple sign-in-with-google passkeys

UpdatedMar 17, 2025
Go

azukaar /Cosmos-Server

Sponsor

Star4.4k

☁️ The Most Secure and Easy Selfhosted Home Server. Take control of your data and privacy without sacrificing security and stability (Authentication, anti-DDOS, anti-bot)

security cloud authentication server selfhosted self-hosted reverse-proxy sso self-hosting cosmos selfhosting