I bet that by now you’ve heard of Airbnb. If you don’t use it, chances are someone you know does. Airbnb lets you rent out your spare room or entire space for money, and the company has been growing like wildfire. Airbnb now has over 350,000 hosts, who are just ordinary people, renting their spaces in over 192 countries. They have booked over 10 million rental nights in homes, apartments, rooms, and spaces just like yours.