Firms hire database marketing service providers to manage, cleanse, and integrate customer data. In many cases, they also pay for marketing operations, analytical services, and strategy support. To assess the state of the market and see how the leading outsourcers stack up against one another, Forrester evaluated the strengths and weaknesses of top database marketing service providers across 125 criteria. The result: Epsilon is in the sweet spot of market demand. The Allant Group and Merkle aren't far behind, thanks in large part to their analytically led service models. Included in this report is an interactive vendor comparison tool that provides detailed product evaluations and customizable rankings.