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Open Source realtime backend in 1 file

The Single Sign-On Multi-Factor portal for web apps, now OpenID Certified™

Flexible authentication solution for Rails with Warden.

The authentication glue you need.

Open source alternative to Auth0 / Firebase Auth / AWS Cognito

ZITADEL - Identity infrastructure, simplified for you.

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

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

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

Integrated set of Django applications addressing authentication, registration, account management as well as 3rd party (social) account authentication. 🔁 Mirror of https://codeberg.org/allauth/django-allauth/

The Open Source Firebase Alternative with GraphQL.

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

OmniAuth is a flexible authentication system utilizing Rack middleware.

Light LDAP implementation

☁️ The Most Secure and Easy Selfhosted Home Server. Take control of your data and privacy without sacrificing security and stability (Authentication, anti-DDOS, anti-bot)

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

An open, sub-millisecond, single-executable Firebase alternative with type-safe APIs, built-in WebAssembly runtime, realtime subscriptions, auth, and admin UI built on Rust, SQLite & Wasmtime.

Amazon Bedrock Agentcore accelerates AI agents into production with the scale, reliability, and security, critical to real-world deployment.

A generic, spec-compliant, thorough implementation of the OAuth request-signing logic

Zero-Trust access management with true WireGuard® 2FA/MFA

REST implementation of Django authentication system.

FreeRADIUS - A multi-protocol policy server.

🔐 oauth2 - A Ruby wrapper for the OAuth 2.0, & 2.1 Authorization Frameworks, including OpenID Connect (OIDC)

Easy to use cryptographic framework for data protection: secure messaging with forward secrecy and secure data storage. Has unified APIs across 14 platforms.

Dromara MaxKey 🗝️ SSO ,Leading-Edge IAM-IDaas(Identity and Access Management) Product , Under Apache-2.0 is free ，业界领先的IAM-IDaas身份管理和认证产品，遵循Apache-2.0开源免费，支持OAuth2.x、OpenID Connect、SAML2.0、CAS、JWT、SCIM等SSO标准协议，基于RBAC统一权限控制，实现用户生命周期管理，开源、安全、合规、自主可控。

An authentication system generator for Rails applications.

Authentication for Django Rest Framework

:closed_lock_with_key: multi factor authentication system (2FA, MFA, OTP, FIDO Server)

Pode is a Cross-Platform PowerShell web framework for creating REST APIs, Web Sites, and TCP/SMTP servers

Rails integration for Rodauth authentication framework