ActiveCampaign and Keap are both marketing automation platforms with unique features. ActiveCampaign excels in advanced email marketing, automation, CRM, site tracking, and event tracking. It offers a robust API, over 870 native integrations, Zapier support, and data warehouse integration. On the other hand, Keap is an all-in-one business management tool for small businesses, offering features like appointment scheduling, invoicing, and payment processing. It has fewer native integrations than ActiveCampaign but supports Zapier and offers data import/export capabilities. Both platforms have tiered pricing models based on the number of contacts and features required.