openid-connect

Keycloak

KeycloakOpen

Open-source identity and access management with single sign-on

Keycloak is open-source identity and access management software that adds login, single sign-on, and access control to apps and services on your own infrastructure.

Zitadel

ZitadelOpen

Open-source identity infrastructure with login and single sign-on

Zitadel is open-source identity infrastructure that adds login, single sign-on, and multi-factor authentication to applications, with multi-tenant organization management, available self-hosted or as a managed cloud.