Auth0 is a cloud-based authentication and authorization service, designed to help developers quickly and easily secure their applications and APIs. Auth0 offers a wide range of features, including single sign-on, social login, multi-factor authentication, passwordless login, user management, and more. It is designed to be easy to use, secure, and scalable. Auth0 provides a comprehensive set of tools to help developers secure their applications, authenticate users, and manage user data. It also offers a flexible integration framework to quickly integrate with any identity provider, such as Google, Facebook, and Microsoft. Auth0 also provides a powerful set of APIs to enable developers to build secure authentication solutions for their applications.
It's more reliable and secure than others, and the dashboard is packed with features that came as a surprise to us :) overall, the best single and two-factor authentication services we've used so far.