1.openfga / openfga
A high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar.
+36 stars
from 6,036 · score 3.61
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2.authzed / spicedb
Open Source, Google Zanzibar-inspired database for scalably storing and querying fine-grained authorization data
+14 stars
from 7,170 · score 2.71
3.apache / casbin
Apache Casbin: an authorization library that supports access control models like ACL, RBAC, ABAC.
+6 stars
from 20,469 · score 1.95
4.ory / keto
The most scalable and customizable permission server on the market. Fix your slow or broken permission system with Google's proven "Zanzibar" approach. Supports ACL, RBAC, and more. Written in Go, cloud native, headless, API-first. Available as a service on Ory Network and for self-hosters.
+2 stars
from 5,414 · score 1.10
5.Permify / permify
An open-source authorization as a service inspired by Google Zanzibar, designed to build and manage fine-grained and scalable authorization systems for any application. — Permify is now part of FusionAuth 🎉
+1 stars
from 5,967 · score 0.69