Epsilon is the industry's leading marketing services firm. Advertising Age ranks Epsilon #1 U.S. Marketing Services Firm and #1 U.S. Direct Marketing Agency. Services include strategic consulting, database and loyalty technology, proprietary data, predictive modeling and a full range of creative and interactive services including brand and promotional development, web design, email deployment, search engine optimization and direct mail production. In addition, Epsilon is the world's largest permission-based email marketer. Epsilon is an Alliance Data company.