FusionAuth
Source-available CIAM; Community self-host free unlimited users
Auth / Auth · Freemium
What's Good
Community Edition: free forever self-host, unlimited users/MAU — OIDC/OAuth/SAML, MFA basics, themes, APIs, Lambdas, multi-tenancy. Flat paid tiers (not per-MAU) for advanced MFA, breached-password, SCIM, theming extras, support. Cloud hosting optional.
The Catch
LOUD: NOT open source — source-available proprietary CE. Vs Keycloak/ZITADEL/Ory: easier admin UX + flat pricing, but you cannot fork freely like Apache/AGPL IdPs. Premium features and FusionAuth Cloud are paid. Ops burden is yours on CE.
Verdict
Free unlimited self-host CIAM. Not OSS; paid for premium/Cloud.
Embed
[](https://stackgems.com/gems/fusionauth)