Epsilon is a full-service, marketing service company that offers a range of services related to proprietary data, predictive modeling, strategic consultation, and database and loyalty technology. With an emphasis on strategic and analytic services, it customizes solutions to meet clients marketing needs. The company provides a variety of creative and interactive services, including Web design, e-mail deployment, search engine optimization, direct mail production, and brand and promotional development. Epsilon s clients include Verizon, AstraZeneca, Nestl Purina PetCare Company, Midas, Hilton Hotels Corporation, and Barnes & Noble. The company serves the insurance, retail, pharmaceutical, consumer packaged goods and financial service industries. It offers a consumer responder database under the TargetSource brand.