Wikipedia
CouchSurfing
Couchsurfing International Inc. operates Couchsurfing.com, a hospitality service and social networking website. The website provides a platform for members to "surf" on couches by staying as a guest at a host's home, host travelers, meet other members, or join an event.
The company raised $22.6 million in investment capital in two rounds of financing in 2011-2012.