Launched in 2012, until now the France-based software company, which also works with smaller properties such as B&Bs and guest houses, was self-funded and had private loans.
Paris and San Francisco-headquartered private equity firm Newfund Capital is behind the new injection of funds into Xotelia.
The company says it will use the financial support to grow its customer base around the world and develop connections to consumer-facing services such as Expedia and Booking.com.