Flexible authentication solution for Rails with Warden

Securely manage and synchronize app data for your users across their mobile devices

OmniAuth is a flexible authentication system utilizing Rack middleware.

User Management and Authentication for Developers

OAuth That Just Works

Token-based AngularJS Authentication

Password-free signups. No social network required.

Buzzfeed's single-sign-on authentication proxy

Everything you need to manage users for your website or app.

Remove the OAuth dance with one request