Comparison

Keycloak vs Supabase

Keycloak and Supabase both land on Depends.

Keycloak

Depends

Confidence: Low

Keycloak fits organizations with several apps, DevOps capacity, and a need for centralized SSO at zero license cost.

Depends

Confidence: Low

Buy if you have developers who want a managed Postgres backend with serious compliance credentials (SOC 2, HIPAA, ISO 27001).

Keycloak versus Supabase
Compare	Keycloak	Supabase
Verdict	Depends	Depends
Best for	Multi-app SSO consolidation	Developer teams wanting Postgres plus auth, APIs, and storage
Who it's not for	Solo devs who just need social login	Non-technical teams wanting a no-code database
Privacy	No known public vulnerabilities found in the sources reviewed.^²	Strong on paper: SOC 2 Type 2, ISO 27001, HIPAA (with BAA), AES-256 at rest, TLS in transit, regular pen tests.^³
Support quality	No support evidence reviewed	No support evidence reviewed
Public sentiment	No user reviews surfaced in the sources reviewed; evidence is limited to the project's official pages.^¹	No independent user reviews were found in the sources reviewed.
Biggest gotcha	Guess: 'Minimum effort' marketing hides realm, client, and role configuration work^¹	Shared responsibility model: misconfigured RLS policies or leaked API keys are your problem, not theirs.^³