Benchmark Email is an international, internet-based service provider of email marketing with headquarters in St. Louis, MO. The company was founded by Curt and Denise Keller in 2004. The company offers various free and paid editions. Benchmark is a member of Returnpath.net and the Email Sender & Provider Coalition industry consortiums. In 2017, Benchmark Email was named one of the "20 B2B Technologies To Try in 2017" by Forbes.