Airbnb is a vacation home social networking service. It matches people looking for vacation rentals with other people that have rooms to rent. These rentals are usually from private parties and not commercial entities (i.e. hotels). In July 2011, the company had over 100,000 listings in 16,000 cities and 186 countries. Listings include private rooms, entire apartments, castles, boats, manors, tree houses, tipis, igloos, private islands, and more.
Their name comes from their original website name Airbedandbreakfast.com.