Silverpop Systems specializes in planning, executing, and managing permission-based e-mail marketing campaigns. Silverpop company blends strategic services that include policy development, campaign strategy creation, and list development services with software, analytics, and creative services to produce efficient targeted e-mail campaigns. Clients have included AMR Research, Fossil, Overstock.com, and Plantronics. Silverpop company increased its international presence when it acquired UK-based interactive ad agency Digital Oxygen. Silverpop's investors include venture capital firms D. E. Shaw, Draper Fisher Jurvetson, ePlanet Ventures, European Founders Fund, NeoCarta Ventures, and Total Technology Ventures.