The easiest, most secure way to use WireGuard and 2FA.

The most comprehensive authentication framework

Authentication for the Web.

Simple, unobtrusive authentication for Node.js.

Self-Hosting Guide. Learn all about locally hosting (on premises & private web servers) and managing software applications by yourself or your organization. Including Cloud, LLMs, WireGuard, Automation, Home Assistant, and Networking.

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

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.

Open source alternative to Auth0 / Firebase Auth / AWS Cognito

An open-source Agent-first Identity and Access Management (IAM) /LLM MCP & agent gateway and auth server with web UI supporting OpenClaw, MCP, OAuth, OIDC, SAML, CAS, LDAP, SCIM, WebAuthn, TOTP, MFA, Face ID, Google Workspace, Azure AD

Build product integrations with AI.

Authentication, simple and clean

Modern authentication, on your terms. Open source alternative to Auth0, Clerk, WorkOS, Stytch.

The C++ REST SDK is a Microsoft project for cloud-based client-server communication in native code using a modern asynchronous C++ API design. This project aims to help C++ developers connect to and interact with services.

The user infrastructure platform. You choose the frontend, backend, and database. Hexclave handles everything else.

A spec compliant, secure by default PHP OAuth 2.0 Server

Laravel wrapper around OAuth 1 & OAuth 2 libraries.

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

Simple OAuth library for Java

The ultimate Python library in building OAuth, OpenID Connect clients and servers. JWS, JWE, JWK, JWA, JWT included.

Open-source auth gateway connecting 1000+ SaaS providers to AI agents through SDK, CLI, MCP, HTTP, and OpenAPI.