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Editorial comparison for operators. Ratings are sample data unless verified.
| Attribute | Customer.io | Mailchimp |
|---|---|---|
| Type | tool | tool |
| Summary | Customer.io is a lifecycle messaging platform that automates email, SMS, and push notifications based on user behavior and data. Built for product teams and lifecycle marketers. | Mailchimp is a freemium email marketing platform that helps small businesses build audiences, create campaigns, and automate customer communications without requiring coding skills. |
| Pricing | usage based · See vendor site — sample data | freemium · See vendor site — sample data |
| Free trial | Yes | Yes |
| API | Yes | Yes |
| Open source | No | No |
| Editor rating | — | — |
| Categories | Marketing Automation, Customer Engagement | Marketing & Growth, Email Marketing, Marketing Automation |
| Key features | Event-based workflow automation with visual builder · Multi-channel messaging: email, SMS, push notifications, and in-app (verify current channels on vendor site) · Behavioral segmentation and audience targeting based on user actions · A/B testing and performance analytics for campaign optimization · API and integration-first architecture for data control | Drag-and-drop email editor with pre-built responsive templates · Audience segmentation and tagging based on behavior and custom fields · Marketing automation workflows for triggered emails (verify current automation limits on vendor site) · A/B testing for subject lines, content, and send times · Integration with e-commerce platforms, CRMs, and web analytics tools |
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