Faye's Sugar-Constant Contact integration eliminates double entry by syncing accounts and contacts, email addresses, marketing lists, campaign results, individual email tracking, and removal results. You can utilize SugarCRM's reporting and workflow engines based on results from Constant Contact.
Very smooth and efficient integration between SugarCRM and Constant Contact. Easy to install and configure. Their tech support is outstanding. I had one technical issue and Scott Miller and his team responded immediately and the issue was solved the same day.