Foursquare Celebrates Birthday With Record Check-ins; Hitwise Releases More Growth Stats

On March 11, Foursquare announced the largest number of check-ins in one day, with a record 275,000 individual check-ins.  On March 13, with SuperSwarms of Foursquare users congregating in Austin for SXSW, the service announced 347,000 check-ins in one day.

Experian Hitwise has released an analysis of Foursquare’s growth to mark the service’s one-year anniversary.  According to this report, not only have Foursquare’s mobile apps seen growth, but so has, which has seen a 5x increase in visits for the week ending March 6, 2010 as compared to the week ending September 19, 2010.

The site’s number-one referrer is Facebook, which accounted for 33% of visits in the week of March 8, 2010, more than Google (22%) and Twitter (8%) combined. Searches for Foursquare-related terms have also increased dramatically, spiking the week of February 20 (which was marked by publicity for and remaining consistent since then.

The Hitwise report was also covered in this Mashable article.