Keycloak fixes that problem. When you run Keycloak self-hosted, you control every part of authentication and authorization. It’s open-source, battle-tested, and works across modern apps and legacy systems without handing the keys to a third party. You run it. You own it. You shape it to fit your security model.
Self-hosting Keycloak gives you full control over user data, identity flows, and integration scripts. You can connect it to LDAP, Active Directory, or any external identity provider. You can theme it, brand it, lock it down. You decide where and how it runs — bare metal, Kubernetes, Docker — and you set the update strategy. No rate limits, no hidden API costs, no data leaving your infrastructure unless you want it to.
Deploying Keycloak in production means you need to think about high availability, backups, and clustering. A proper self-hosted Keycloak setup includes a fast database, tuned cache, and monitoring hooks. It supports single sign-on, OAuth2, OpenID Connect, SAML, and passwordless login out of the box. Its admin console makes it clear where to configure realms, clients, roles, and groups.