Keycloak

• The open source IAM solution
• Authorization server
• Supports the latest standard protocols
• User Authentication for applications
• SSO support (Single Sign On/Out)
• Fine–grained Authorization capabilities
• OpenID/SAML2.0 Identity Provider
• HA, Scalability, Multitenancy support
• Identity Brokering and Social Login
• User Federation support
• LDAP/Active Directory integration
• Customizable and extendable
• https://www.keycloak.org/

Architecture

Domain Model