From Quartz, January 10, 2015
The rooms available in 2014 jumped from 300,000 in February to a million in December, while the largest hotel company in Europe measured by rooms, InterContinental Hotels Group (IHG), had about 698,000 rooms in its portfolio. Airbnb offers more rooms than many of the largest hotel groups in the world–Hilton, InterContinental and Marriott—which each maintain just under 700,000 rooms. (Marriott said today at the World Economic Forum that it expects its portfolio of hotels to surpass 1 million rooms by the end of 2015.)
The size comparison isn’t a direct one, since Airbnb doesn’t own the rooms booked on its site, and many listings aren’t available year-round. And when it comes to guest bookings, Airbnb still has a long way to go: Barclay’s report estimates that Airbnb’s current bookings are about 37 million room-nights per year, which is only around 20% of IHG’s 177 million last year.