Keycloak

Keycloak is an open source identity and access management solution that provides single-sign-on and authentication to applications and secure services with minimum effort. It allows users to authenticate with Keycloak rather than individual applications, reducing the attack surface for enterprise security. Keycloak is a popular choice for companies looking to add authentication and authorization to their applications. It is widely used in the industry and has a strong community of developers who contribute to its development. Keycloak is a self-hosted solution, giving companies full control over their authentication and authorization systems.