SuperTokens Passwordless

SuperTokens Passwordless is an open-source authentication platform built for developers. It provides the tools to add secure user login and session management to your applications. You can implement passwordless logins via magic links, traditional email/password authentication, social logins (like Google or GitHub), and single sign-on (SSO). The core service runs on your own infrastructure, giving you full control over user data and security compliance, while their SDKs handle the complex security logic.

The platform stands out for its flexible, modular architecture. Instead of a rigid, one-size-fits-all service, it offers 'recipes' and plugins. This means you can start with a pre-built login UI for a fast setup, or use the SDKs to build a completely custom interface. You can also add functionality through plugins, such as CAPTCHA protection to block bots or a user-banning system for administrators. It integrates with over 25 frontend and backend frameworks, including React, Vue, Go, Python, and Flutter.

This tool is ideal for development teams that want to own their authentication stack without building it from scratch. It's a practical choice for startups looking to launch quickly with a secure, professional login system, and for larger enterprises that need to meet specific security or multi-tenancy requirements. If you're tired of redirecting users to a third-party domain for login or need more flexibility than closed-source auth services offer, SuperTokens Passwordless provides a developer-friendly alternative.