Mailchimp and Constant Contact are both popular marketing automation software platforms, but they differ in several ways. Mailchimp has a more user-friendly interface, with drag-and-drop email builder options, advanced automation features, and an easy to use dashboard. Constant Contact, on the other hand, offers more in-depth reporting options and a wide array of eCommerce integrations.
In terms of pricing, both platforms offer a similar range of features with plans ranging from free to high-end paid plans. However, Constant Contact's paid plans can be more expensive than Mailchimp's.
Overall, Mailchimp is a better choice for small businesses and startups who are more focused on creating visually-stunning campaigns and automations, while Constant Contact is a better choice for larger businesses who require advanced analytics and integration options.