Alibris is a major online marketplace founded in 1998, connecting buyers with independent sellers of new, used, rare, and out-of-print books, music, and movies, offering millions of unique items and supporting small businesses while serving customers, libraries, and educational institutions globally. It acts as a central hub, providing a vast selection of media, simplified purchasing, and services like textbook rentals and collection development for libraries, all while focusing on customer satisfaction and supporting the independent seller community.