This document summarizes statistics about three social media platforms: WeChat, Google+, and Care2. WeChat is a Chinese messaging app launched in 2011 with over 300 million users by 2013. It supports multiple languages and networks. Google+ is a social networking site owned by Google, launched in 2011, and had 540 million users by October 2013. Care2 is a social network founded in 1998 to connect activists, with over 21 million members who have participated in online campaigns.