TripAdvisor is an online travel agency that provides reviews and booking services for hotels, restaurants, and attractions. The company was founded in 2000 and is headquartered in Needham, Massachusetts. TripAdvisor operates in 49 markets worldwide and has over 730 million reviews and opinions covering over 8 million accommodations, airlines, experiences, and restaurants. The company's mission is to help people around the world plan and book the perfect trip. TripAdvisor has been recognized as one of the best companies to work for in the United States.