MailChimp is an email marketing service with over 2 million users. They provide an easy way for users to send email newsletters, manage subscriber lists, and track campaign performance.
MailChimp takes a variety of basic and advanced features (like templates, list segmentation, a/b testing, geo-targeting and ROI tracking) and makes them accessible to the everyday user through automation and a competitive price point.
Their platform uses an open API and encourages other systems and web applications to integrate with its email-marketing engine. Currently they offer integrations with systems such as PayPal, Google Analytics, Shopify, Magento, Salesforce and several others.