Foursquare CEO has told the Wall Street Journal overnight that Microsoft had entered a "stragetic partnership" and invested $15 million in the company.
According to the Journal interview with Foursquare CEO Dennis Crowley, Microsoft also signed a "multi-year contract to license Foursquare data in services such as its mobile operating system and Bing search engine."
The investment will be added to the $35 million investment round Foursquare announced last December and which valued the company at about $650 million.
The Journal story claimed that as a result of the deal, Microsoft is now Foursquare's single biggest source of revenue.
Foursquare enables users to check-in from various locations, and has been running since 2009. Micrsoft said last year that its search site Bing was integrating Foursquare data via the Bing Sidebar.
The news also follows a similar deal in 2007 which saw Microsoft invest heavily in Facebook, which is now valued at over US$100 billion. Microsoft got a new CEO today, the 46 year old Satya Nadella.