Airbnb is a community marketplace for people where unique spaces around the world can be listed and booked through mobile phones or the Internet. The listing of accommodation is free of charge for hosts and travellers are able to book accommodations from a list of verified hosts. To connect guests and hosts, Airbnb provides a private messaging system as well as an user recommendation feature. The charging occurs after the reservation has been made. The company promises security and reliability based on user reviews and ratings as well as on a secure payment system. Hosts are granted a property insurance coverage for offering their free space.