Booking,com and Expedia both have pretty similar business models. At their core, both companies sell travel bookings -- hotels, airfares, and rental cars primarily -- and they do so in a variety of different ways. Each company collects a fee for each booking it completes, acting as a middleman. That’s a strong business which requires no inventory but it’s also a model that comes with the risk of partners creating stronger direct relationships with their customers.  

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