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Keycloak vs Ory Hydra: catalog facts
Keycloak	Ory Hydra
Free Free and open source under the Apache 2.0 licence.	Freemium Free to self-host; a hosted version is offered on Ory Network.
Self-hosted	Self-hosted
Single sign-on and single sign-out across applications Supports OpenID Connect and SAML 2.0 identity brokering	OpenID Certified OAuth and OIDC implementation Works with an existing user management system
Setting it up and securing it takes real administrative effort More than most single-user homelabs need	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: Apache-2.0	License not stated
Not stated if an account is 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 September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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