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Apereo CAS vs Ory Hydra: catalog facts
Apereo CAS	Ory Hydra
Free Free and open source.	Freemium Free to self-host; a hosted version is offered on Ory Network.
Self-hosted	Self-hosted
Supports CAS, SAML, OAuth and OpenID Connect Many deployment options including Docker and Kubernetes	OpenID Certified OAuth and OIDC implementation Works with an existing user management system
Complex to deploy and configure for small setups Requires Java servlet and build tooling knowledge	Headless: you build login and consent screens yourself Requires OAuth and OIDC knowledge to deploy
Self-hosted	Self-hosted, Hosted service
Open source	Open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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