Top AUTH GitHub Repositories & Tools (2026)

ChatGPT thinks. Codex works. Use ChatGPT as the planning brain while keeping the Codex harness.

The Postgres development platform. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.

Claude Code multi-account manager, usage monitor (CLI, TUI & MCP cross-account delegation)

Open Source realtime backend in 1 file

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

Free implementation of Play Services

Self-hosted OpenAI-compatible API for Qoder CLI login,workbuddy, with SQLite multi-account routing

The most comprehensive authentication framework

Facial authentication for Linux

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

Single Sign-On Identity & Access Management via OpenID Connect, OAuth 2, PAM

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

A reverse proxy that provides authentication with Google, Azure, OpenID Connect and many more identity providers.

One library | Many payment processors | Scale to multiple processors with few lines of code.

An AI Gateway, registry, and proxy that sits in front of any MCP, A2A, or REST/gRPC APIs, exposing a unified endpoint with centralized discovery, guardrails and management. Optimizes Agent & Tool calling, and supports plugins.

Build, run and scale AI agents like API and microservices

FreeRADIUS - A multi-protocol policy server.

Rallly is an open-source scheduling and collaboration tool designed to make organizing events and meetings easier.

The tiniest OpenID Certified™ authorization and authentication server you have ever seen.

The Open Source DocuSign Alternative.