Authorizer is an open-source, self-hosted authentication and authorization platform for teams that want to run identity in their own infrastructure. The homepage positions it as a way to keep user records in your own database while handling login, access control, and related identity workflows in one service.
The product combines OAuth2 and OpenID Connect with SAML SSO, SCIM provisioning, MFA, passkeys, embedded OpenFGA-style fine-grained authorization, and permission-aware AI/RAG access control. It is presented as cloud-native software that can run in Docker, Kubernetes, Helm, and several managed deployment environments.