The social location check-ins application FourSquare has 15 million
users worldwide, and now they are using OpenStreetMap! The foursquare
website now features lovely custom rendered OpenStreetMap maps.
We ultimately ended up switching because, after all our
research and testing, OpenStreetMap and MapBox was simply the best fit
This will surely be a great boost to OpenStreetMap contribution too,
as people spot areas where the map needs to be improved. Foursquare
users, welcome to the OpenStreetMap community.