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authentik vs Keycloak: catalog facts
authentik	Keycloak
Free The software is free under its open-source licence. Hosting, hardware and external…	Free Free and open source under the Apache 2.0 licence.
Linux, Self-hosted, Web	Self-hosted
One server covers SAML, OAuth2/OIDC, LDAP and RADIUS, with a flow builder that lets you compose the login…	Single sign-on and single sign-out across applications Supports OpenID Connect and SAML 2.0 identity brokering
The flow model is powerful but confusing at first, and some organisation-scale features sit in a paid enterprise…	Setting it up and securing it takes real administrative effort More than most single-user homelabs need
Self-hosted	Self-hosted
Open source	Open source
License: MIT	License: Apache-2.0
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 22, 2026	Official website Full listing and sources Checked September 23, 2026

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