Stack Auth

Stack

Last updated October 8, 2025

About This Template

Stack Auth is an open-source authentication platform that serves as a developer-friendly alternative to Auth0 and Clerk, designed specifically for Next.js, React, and JavaScript applications. This comprehensive authentication solution provides everything needed for user management including OAuth integration with popular providers (Google, GitHub, Microsoft), magic link authentication, passwordless login with passkeys, multi-tenancy support for serving multiple organizations, role-based access control (RBAC) for granular permissions, and automatic email notifications for user actions. The platform can be set up in just five minutes and offers both managed cloud hosting and self-hosting options, giving teams complete control over their authentication infrastructure. Built with developer experience in mind, Stack Auth includes pre-built UI components styled with shadcn/ui, TypeScript SDK for type-safe integration, webhook support for custom workflows, and comprehensive session management. Perfect for startups and enterprises building SaaS applications, the platform eliminates the complexity of authentication while remaining extensible and customizable, allowing developers to add authentication to their Next.js applications without vendor lock-in or hefty monthly fees, while maintaining full ownership of user data and authentication flows.

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