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Keycloak vs Microsoft Entra ID: catalog facts
Keycloak	Microsoft Entra ID
Free Free and open source under the Apache 2.0 licence.	Paid Subscription service with a free trial.
Self-hosted	Web
Single sign-on and single sign-out across applications Supports OpenID Connect and SAML 2.0 identity brokering	Central cloud directory for user accounts Single sign-on to applications
Setting it up and securing it takes real administrative effort More than most single-user homelabs need	Cloud-only, tied to Microsoft's platform Aimed at organisations rather than individuals
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 September 23, 2026

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