An authorization library that supports access control models like ACL, RBAC, ABAC in Golang: https://discord.gg/S5UjpzGZjN

The authentication glue you need.

一个轻量级 Java 权限认证框架，让鉴权变得简单、优雅！—— 登录认证、权限认证、分布式Session会话、微服务网关鉴权、单点登录、OAuth2.0

The only web-scale, fully customizable OpenID Certified™ OpenID Connect and OAuth2 Provider in the world. Become an OpenID Connect and OAuth2 Provider over night. Written in Go, cloud native, headless, API-first. Available as a service on Ory Network and for self-hosters. Relied upon by OpenAI and others for web-scale security.

ZITADEL - Identity infrastructure, simplified for you.

Apereo CAS - Identity & Single Sign On for all earthlings and beyond.

🧑‍🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

Expose your FastAPI endpoints as Model Context Protocol (MCP) tools, with Auth!

Open Policy Agent (OPA) is an open source, general-purpose policy engine.

CASL is an isomorphic authorization JavaScript library which restricts what resources a given user is allowed to access

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

The authorization Gem for Ruby on Rails.

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.

Doorkeeper is an OAuth 2 provider for Ruby on Rails / Grape.

Policy and data administration, distribution, and real-time updates on top of Policy Agents (OPA, Cedar, ...)

The Developer Platform for Modern APIs

Orchestrate end-to-end encryption, cryptographic identities, mutual authentication, and authorization policies between distributed applications – at massive scale.

A binary authorization and monitoring system for macOS

An unified permissions API for React Native on iOS, Android and Windows.

A high performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar