To the companies providing the identities for social logins, these services constitute an additional source of potentially valuable information. It comes as no surprise that Facebook is the most popular choice for social logins, given the services huge user base.
According to Janrain, the social network powered 45 percent of social logins in the third quarter of 2013. However, Google is gradually closing the gap on Facebook. Google’s share of social logins increased from 31% in Q4 2012 to 35% in the most recent quarter, while Facebook’s share declined from 49% to 45%. Other companies, including Yahoo, Twitter, LinkedIn and Microsoft, account for just 20% of social sign ins, illustrating the dominance of the big two in yet another segment.
Link to the full article in Statista: http://www.statista.com/chart/1525/facebook-and-google-dominate-social-sign-ins/