Mailchimp is a popular email marketing platform that has been around since 2001 and is known for its simplicity, clear branding, and free plan that includes up to 500 contacts and 1,000 sends per month. However, it may not offer the most advanced features compared to other platforms like ActiveCampaign. ActiveCampaign, on the other hand, offers more features, especially when it comes to marketing automation, customization, and CRM capabilities. While Mailchimp is easier to use and has more features for building emails, ActiveCampaign's builder allows for more customization options, such as controlling mobile formatting and adding conditional content. ActiveCampaign also offers more advanced marketing automation features, including A/B testing, SMS blocks, and website messages, as well as an automation map that allows users to visualize multiple customer journeys. Ultimately, the choice between Mailchimp and ActiveCampaign depends on what you need and what will get the job done most efficiently for you.