openfga/openfga

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 🎉

Open Source, Google Zanzibar-inspired database for scalably storing and querying fine-grained authorization data

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.

Warrant is a highly scalable, centralized authorization service based on Google Zanzibar. Use it to define, enforce, query, and audit application authorization and access control.

Cerbos is an open-core authorization management platform for authorizing every identity and governing every action across applications, gateways, workloads, and AI agents.

Apache Casbin: an authorization library that supports access control models like ACL, RBAC, ABAC.

Implementation of the Cedar Policy Language

Cloud-native authorization for modern applications and APIs

An authorization library that supports access control models like ACL, RBAC, ABAC in Node.js and Browser