Customer.io is a customer engagement platform that helps businesses send personalized messages across email, SMS, push notifications, and in-app channels.

Customer.io is a powerful customer engagement platform designed to help businesses communicate with users at the right time with the right message. It enables companies to create highly personalized, data-driven messaging experiences across multiple channels, including email, SMS, push notifications, and in-app messages. With flexible data integration and advanced segmentation, Customer.io allows teams to trigger messages based on real-time user behavior, attributes, and lifecycle stages. This makes it ideal for product, marketing, and growth teams looking to improve user onboarding, retention, and conversion. Trusted by startups and enterprises alike, Customer.io provides the tools needed to build meaningful, automated customer communications while maintaining full control over data and messaging logic.