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Keycloak vs Google Cloud Identity: catalog facts
Keycloak	Google Cloud Identity
Free Free and open source under the Apache 2.0 licence.	Freemium Can be started for free; paid tiers add further features.
Self-hosted	Web
Single sign-on and single sign-out across applications Supports OpenID Connect and SAML 2.0 identity brokering	Combines identity, access and device management API for provisioning users, groups and devices
Setting it up and securing it takes real administrative effort More than most single-user homelabs need	Requires verifying a domain you own Hosted by Google only, with no self-hosted option
Self-hosted	Hosted service
Open source	Closed source
License: Apache-2.0	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
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.