We identified 11 significant customer insights (CI) services providers — Acxiom, Ansira, Epsilon, Experian Marketing Services, Harte Hanks, Merkle, Precision Dialogue, Rapp, Targetbase, Wunderman, and Yes Lifecycle Marketing — and researched, analyzed, and scored them. This report details our findings about how well each vendor fulfills our criteria, and where they stand in relation to each other, to help CI professionals and marketers select the right partner for either their database operations or customer engagement strategy needs.