Airbnb, Inc. is an American online marketplace founded in 2007, with its official launch in 2008. The company connects hosts and guests for short- and long-term accommodations worldwide, charging commissions on bookings. Headquartered in San Francisco, Airbnb started with the founders renting air mattresses in their apartment and has since evolved to offer a wide range of unique stays, including entire homes, luxury properties, and non-traditional options. Airbnb's platform features over 5 million hosts and listings in 81,000 cities across 191 countries. In addition to accommodations, the company offers local experiences for guests to book activities and tours. Airbnb has developed a custom payments platform, introduced an app for seamless mobile bookings, and provides a host guarantee for added security. The company has seen significant growth, reaching over 2 billion guest arrivals and achieving a valuation near $80 billion by 2025.