ZITADEL - Identity infrastructure, simplified for you.

A 100% free modern JS SaaS boilerplate (React, NodeJS, Prisma). Full-featured: Auth (email, google, github, slack, MS), Email sending, Background jobs, Landing page, Payments (Stripe, Polar.sh), Shadcn UI, S3 file upload. AI-ready with tailored AGENTS.md, skills, and Claude Code plugin. One cmd deploy. Powered by Wasp full-stack framework.

Open source alternative to Auth0 / Firebase Auth / AWS Cognito

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

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.

The authentication glue you need.

Flexible authentication solution for Rails with Warden.

Authentication for the Web.

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

The most comprehensive authentication framework