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

Internet-scale OpenID Certified™ OpenID Connect and OAuth2.1 provider that integrates with your user management through headless APIs. Solve OIDC/OAuth2 user cases over night. Consume as a service on Ory Network or self-host. Trusted by OpenAI and many others for scale and security. Written in Go.

ZITADEL - Identity infrastructure, simplified for you.

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

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

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

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

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

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