Customer.io vs Kit (formerly ConvertKit)
Side-by-side trajectory, velocity, and editorial themes.
Customer.io is consolidating everything around Design Studio and richer in-app messaging.
Customer.io's releases center on maturing Design Studio, its newer message-building environment, and deepening in-app messaging. Recent work adds a review/error panel, dark-mode styling for in-app messages, a classic-to-Design-Studio email converter, brand variants for global components, and a no-code notification inbox—plus workspace hygiene features like auto-archiving stale segments.
The through-line is migrating users off the classic drag-and-drop editor onto Design Studio while making in-app and on-site messaging first-class. Customer.io is broadening from email orchestration toward a unified, brand-consistent multi-channel message builder with self-service polish.
Expect continued Design Studio feature parity pushes (more converter coverage, more global-component controls) and further build-out of the notification inbox and in-app surface, nudging users to treat Design Studio as the default authoring environment.
Kit pushes past email tooling toward audience intelligence and AI-tool access.
Kit (formerly ConvertKit) is layering two new capabilities on top of its email and automation core: subscriber intelligence and AI-tool integration. Alongside those, it shipped a navigation redesign, a rebuilt landing page editor, and a rename of Creator profile to Newsletter site. The base product keeps getting incremental search and editor polish while the headline bets are data and AI.
The direction is from send-and-automate toward understand-your-audience and operate-Kit-from-anywhere. Subscriber Signals adds an audience data layer that competes with standalone enrichment tools, while the Kit MCP exposes the platform to external AI assistants. Together they reposition Kit as creator infrastructure rather than just an email sender.
Expect Subscriber Signals to move from early access toward general availability and the MCP to graduate from beta with broader write actions across lists, sequences, and broadcasts.
See more alternatives to Customer.io →
See more alternatives to Kit (formerly ConvertKit) →