This document provides an overview of the enterprise customer data platform (CDP) market and guidance for choosing a CDP. It finds that the CDP market is growing rapidly due to increasing complexity in customer data and journeys. CDPs collect, normalize and build unified customer profiles from all data sources to share across marketing systems. The report describes key CDP capabilities, vendors, and recommends a multi-step process for selecting a CDP that includes determining needs, identifying vendors, scheduling demos and checking references. Nineteen leading CDP vendors are profiled.