OmniAuth vs. Userbin vs. Auth0

OmniAuth is a Ruby authentication framework aimed to abstract away the difficulties of working with various types of authentication providers. It is meant to be hooked up to just about any system, from social networks to enterprise systems to simple username and password authentication.

Add one line of code to your website to get a login interface that is consistent across all browsers. Start accepting signups and handle logins with no additional HTML or CSS.

A set of unified APIs and tools that instantly enables Single Sign On and user management to all your applications.