Marriott International è il più grande gruppo alberghiero del mondo. Ha sede a Bethesda, Maryland, USA, e conta quasi 6.000 proprietà in 120 paesi. Marriott gestisce direttamente o in franchising strutture alberghiere e resort. I 30 brand principali sono: Bulgari, The Ritz-Carlton and The Ritz-Carlton Reserve, St. Regis®, W, EDITION, JW Marriott, The Luxury Collection, Marriott Hotels, Westin, Le Méridien, Renaissance Hotels, Sheraton, Delta Hotels by Marriott, Marriott Executive Apartments, Marriott Vacation Club, Autograph Collection Hotels, Tribute Portfolio, Design Hotels, Gaylord Hotels, Courtyard, Four Points by Sheraton, SpringHill Suites, Fairfield Inn & Suites, Residence Inn, TownePlace Suites, AC Hotels by Marriott, Aloft, Element, Moxy Hotels e Protea Hotels by Marriott. Il gruppo gestisce i rinomati programmi fedeltà Marriott Rewards, che comprende Ritz-Carlton Rewards, e Starwood Preferred Guest.