I started a company to assist OEM buyers with custom manufacturing sources. Success requires creation of a data base of contacts, and then a robust system to communicate with them as well as organize responses. After a great deal of research I chose Act-On in 2012, and have had zero reasons to think it was not the very best choice. The system is comprehensive, fairly easy to use (even for an old guy like me) and the best thing is infinite access to my success counselor, who's been wonderful. As one-man company heavily involved in marketing (not a skill area), the success counselor has been essential in the company's progress.