Tucked in between Starwood and Wyndham Hotels, and handsomely ahead of Hyatt and InterContinental in terms of valuations, is Airbnb, an online service that enables people to rent their homes to travelers.

Founded in 2008, Airbnb is valued at $10 billion. It's attracting the likes of investors such as TPG, and it's expected that Fidelity and T. Rowe Price will join the investment group. The company currently has more than 600,000 listings in more than 190 countries with revenue last year around $250 million and growing rapidly.

From a human capital point of view, this hospitality company isn't much of a story because there are no housekeepers, front desk clerks, engineers or, for that matter, any employees except for some technology types and two founders who are laughing all the way to the bank.