Business travelers are increasingly booking stays through Airbnb and other home-sharing sites.
Airbnb said Monday that nearly 700,000 companies have signed up and booked rooms through its business travel portal, almost triple the number since last year.
Airbnb said 15 percent of its travel nights booked are for business travelers. That compares with 20 percent for Booking.com, which includes homes and hotels.
But home-sharing companies have a long way to go to catch up to hotels. Marriott International said business travel accounts for 70 percent to 80 percent of nights booked at its hotels.