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FusionAuth vs Kanidm: catalog facts
FusionAuth	Kanidm
Freemium Free Community edition to download, with paid plans and hosted deployments.	Free Free and open source.
Web, Self-hosted	Linux, Self-hosted, Command line
Can run self-hosted, on-premises or air-gapped Supports SSO, MFA, OAuth2 and OpenID Connect	OAuth2, LDAP and passkeys in a single server Unix integration for Linux logins
Aimed at developers building apps rather than managing staff accounts Advanced features require paid plans	Smaller ecosystem than long-established directory servers Requires running and securing your own server
Self-hosted, Hosted service	Self-hosted
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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