Authentik is a flexible, open-source Identity Provider (IdP) designed to unify authentication across applications and infrastructure. Supporting SAML, OAuth2, LDAP, SCIM, and OIDC, it offers powerful user management, SSO capabilities, detailed access policies, and a flow-based configuration engine for customizing authentication logic. Authentik is ideal for teams seeking a modern, self-hosted alternative to cloud-based identity platforms with granular control and extensibility.