Press for Airbnb

Peer-to-peer housing rental site Airbnb was on fire last year. As we previously reported, nights booked were up approximately 500 percent. In addition, we estimated in a recent note that its revenues grew to $52.8 million, up from $8.4 million a year prior.

"There’s someone in my apartment . . . right now." Joe Gebbia sounds like he’s reading a line from a horror film. It’s October, and Gebbia is in New York to speak at a design conference. Back home, in San Francisco, a complete stranger is roaming around his living room. But Gebbia isn’t phoning the police--he’s grinning. This stranger is paying him $80 per night for the pleasure.

Airbnb, the world’s leading marketplace to list, discover and book unique accommodations, today announced a milestone of 5 million guest nights booked since the company’s founding in 2008. With over 4 million guest nights booked in the last twelve months alone, Airbnb has reached a tipping point of global adoption.

Travelers have used Airbnb to book a total of five million guest nights in the past four years, staying in spare bedrooms and empty homes around the world.

Even more impressive is that a majority of those bookings — four million — occurred in 2011 alone, according to the San Francisco vacation-rentals company.

Today, the start-up provided a number of metrics for how the company performed last year, and in the months since it raised $112 million, which valued the company at more than $1 billion.