SalesHandy and Mailshake are two popular software applications used for email automation and relationship-building campaigns. While both are similar in that they offer ways to automate generation of emails and manage lists of contacts, they differ in the degree of flexibility they offer users in terms of customizing their campaigns. Mailshake provides more built-in features and customization options compared to SalesHandy, allowing users to create more personalized campaigns. SalesHandy, however, stands out for its analytics capabilities, providing detailed reports about email performance and tracking. Depending on the users specific needs, either service may be better for different users.