Social Networking Stats: Foursquare Tops 15 Million, #RLTM Scoreboard

The #RLTM Scoreboard:  Social Network Stats for the Week

Facebook: over 800 million users via Facebook
Twitter: over 200 million users via ReadWriteWeb
Renren: over 170 million users via iResearch iUser Tracker
Qzone: 480 million users via Wikipedia
Sina Weibo: over 250 million users via Forbes
LinkedIn: 135 million members via LinkedIn
Groupon: 115 million subscribers via Reuters
Google Plus: over 40 million users via Google
Tumblr: 36 million blogs via Tumblr
Posterous: 3.9 million members via SF Gate
Foursquare: 15 million users via Mashable

Please email marissa@modernmediapartners.com if you have additional updates, or a social network that you feel should be on the list.

Foursquare Tops 15 Million Users

Foursquare Tops 15 Million UsersOn December 5, Foursquare revealed that the geo-social platform has now topped 15 million users, with half of its users in the U.S. and the other half international.  Since this time last year, Foursquare has tripled its user base.

This announcement came on the same day that Facebook‘s acquisition of Gowalla was made official, eliminating another Foursquare competitor from the field.  Competitors remaining include Facebook Places, Loopt (5 million users), SCVNGR (2 million users), and MyTown (4.5 million users).

The “lion’s share” of smartphone users still have yet to download Foursquare or another geo-social app to their mobile, leaving a huge opportunity for these platforms to grow in the U.S. and internationally, as reported by Mashable.

Will this be the year that check-ins really catch on? And will apps like Foursquare dominate this market, or will the ease of using Facebook Places (already in the Facebook mobile app) make this the dominant platform for checking in?