Head-to-head
Cerbos vs OpenFGA
OpenFGA leads: the AI models rank it above its rival on 1 of the 1 leaderboard they share. Based on how ChatGPT, Claude, Gemini & Grok rank both across the leaderboard they share — re-polled weekly, reasoning shown verbatim.
| Leaderboard | Cerbos | OpenFGA |
|---|---|---|
| Best fine-grained authorization engine for microservices | #3 / 7 | #2 / 7 |
Why the models rank Cerbos — on best fine-grained authorization engine for microservices
“Excellent microservice ergonomics: stateless sidecar or centralized deployment, readable Git-managed resource and principal policies, strong ABAC/RBAC support, batch decisions, query-plan generation for filtering data, and no separate relationship database requirement.”
Why the models rank OpenFGA — on best fine-grained authorization engine for microservices
“Decouples authorization logic from microservices using a highly readable DSL and a visual modeling playground, backed by the CNCF. It is extremely scalable, supports Zanzibar-style ReBAC, and has a large, active community with great SDK support.”
More head-to-heads
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Ranks from the merged 4-model leaderboards · re-polled weekly · methodology