Stack-auth

Stack Auth delivers a comprehensive authentication system that gives developers full control over their user identity infrastructure. Unlike proprietary services, this open-source platform lets you own your authentication data while providing enterprise-grade features like social logins, passwordless authentication, and advanced session management.

Built specifically for TypeScript and React ecosystems, Stack Auth integrates seamlessly with Next.js applications and uses modern UI components from shadcn. It handles the complex security considerations of authentication—token management, password hashing, OAuth flows—so you can focus on building your application's core features.

The platform offers multiple authentication strategies including traditional email/password, magic links for passwordless login, and social authentication providers. With built-in session management and a developer-friendly API, you get the convenience of managed auth services without vendor lock-in or recurring costs.

Whether you're building a SaaS product, internal tool, or customer-facing application, Stack Auth provides the flexibility to customize authentication flows while maintaining security best practices. Deploy it on your infrastructure and scale according to your needs.