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Keycloak vs Apereo CAS: catalog facts
Keycloak	Apereo CAS
Free Free and open source under the Apache 2.0 licence.	Free Free and open source.
Self-hosted	Self-hosted
Single sign-on and single sign-out across applications Supports OpenID Connect and SAML 2.0 identity brokering	Supports CAS, SAML, OAuth and OpenID Connect Many deployment options including Docker and Kubernetes
Setting it up and securing it takes real administrative effort More than most single-user homelabs need	Complex to deploy and configure for small setups Requires Java servlet and build tooling knowledge
Self-hosted	Self-hosted
Open source	Open source
License: Apache-2.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.