Facebook Login is described as 'A secure, fast, and convenient way for users to log into your app, and for your app to ask for permissions to access data' and is a authentication protocol in the security & privacy category. There are more than 10 alternatives to Facebook Login for a variety of platforms, including Self-Hosted, iPhone, iPad, Mac and Windows apps. The best Facebook Login alternative is OpenID, which is both free and Open Source. Other great apps like Facebook Login are OAuth, Portier, humanID and Twitter OAuth.