Constant Contact is a comprehensive email marketing platform that provides businesses with email templates, contact management, automation options, and more. SalesHandy is a sales productivity platform that helps salespeople send emails, track emails, schedule follow-ups, and use templates for email campaigns. The main difference between the two is that SalesHandy is more focused on sales-related activities, while Constant Contact focuses more on overall email marketing activities. Both platforms have their uses, and each can be used to increase overall productivity and results. Constant Contact is a great platform for businesses who want to send large batches of email campaigns, while SalesHandy is more suited to salespeople who need to keep track of email sequences and follow-up tasks.