Auth.js Compatibility

FastAPI and Auth.js can work together, but they require careful architectural planning since Auth.js is designed for JavaScript frameworks and FastAPI is a Python backend.

Auth.js is designed for JavaScript frameworks and doesn't natively support Flask, but you can use them together by treating Flask as a backend API and running Auth.js in a separate frontend application.

Django and Auth.js can work together, but you're mixing a Python backend with a JavaScript auth library designed for JavaScript frameworks—it requires building a custom integration layer.

Auth.js can be used with NestJS, but it requires manual integration since Auth.js is primarily designed for Next.js and edge runtimes.

Auth.js is JavaScript-first and designed for frontend frameworks; using it with Rails requires building a separate Next.js/React frontend or implementing custom backend bridges.

Auth.js can work with Fastify, but it requires manual integration since there's no official Fastify adapter—you'll need to handle session management and callbacks yourself.

You can use Supabase with Auth.js, but they're both full-featured auth solutions that require careful integration to avoid conflicts.

Auth.js is primarily designed for Next.js and JavaScript frameworks, so using it with Laravel requires treating them as separate systems communicating via APIs.

Firebase and Auth.js can work together, but you're duplicating authentication logic—Auth.js doesn't natively support Firebase Auth providers without custom integration.