Airbnb was founded in 2008 by Joe Gebbia and Brian Chesky in San Francisco, initially renting out air mattresses to cover their rent. The company grew rapidly through innovative marketing, significant funding rounds, and by expanding its offerings, overtaking major hotel chains in bookings by 2012. Today, Airbnb serves millions of listings globally, emphasizing unique travel experiences and community engagement, and has evolved a complex business model supported by hosts, investors, and diverse revenue streams.