Mailchimp, the all-in-one marketing platform that helps you manage and communicate with your customers with beautifully designed email campaigns and powerful data analysis is commonly used by nonprofits to talk to their constituents. This extension integrates CiviCRM with Mailchimp to help keep your contacts groups in sync with subscribers of Mailchimp lists. It can sync different CiviCRM groups to different Mailchimp lists. Additionally, if you use Mailchimp’s Interests feature, you can map particular Mailchimp interests to a CiviCRM group. You can choose whether this is a group that the subscriber can edit (using Mailchimp’s forms), or not.