NextAuth.js

NextAuth.js (now Auth.js) is the authentication library built specifically for Next.js applications, with growing support for other frameworks. It handles OAuth with 50+ providers, credentials-based login, magic links, and session management with minimal configuration. Its open-source nature means no per-user fees and full customization. For Next.js founders who want authentication that integrates seamlessly with their framework, NextAuth is the community standard.

Projects using NextAuth.js