Foursquare Labs Inc., commonly known as Foursquare, is a geolocation technology company and data cloud platform based in the United States. Founded by Dennis Crowley and Naveen Selvadurai in 2009, the company rose to prominence with the launch of its local search-and-discovery mobile app. The app, Foursquare City Guide, popularized the concept of real-time location sharing and checking-in. Alongside additions and iterations to its consumer apps, the company also began to create products that leverage the location data collected via billions of check-ins. Source: Wikipedia (en)