Digital 55 is a custom digital communications and marketing company with innovative cloud solutions providing business tools, intelligence, big data, and soft data cloud solutions. Started in 2004, OnLetterhead was launched as a branded 1:1 email tool for Microsoft Outlook. OnLetterhead remains a corner stone product, however, now Digital-55 is redesigned and enhanced by new ownership investing into rebuilding the OnMarketplace platform and by connecting new products for small and medium-size businesses.