Customer.io helps you send targeted human messages to your users, by utilizing their unique interactions with your business. Send emails based on what people do (or don’t do). Flexible segmentation, Comprehensive reporting and A-B testing are a sample of our enterprise-class features in every Customer.io account. We track the way people use your app and keep every email you send each person. You can use that history to tailor each person’s experience. Immediately your real-time data is streaming in to Customer.io and triggering actions based on rules you control.