OneSignal offers a powerful multi-channel platform that includes mobile and web push notifications, in-app messaging, SMS, and email. When you integrate OneSignal with Amplitude, you can develop sound messaging strategies that drive user engagement and optimize conversions. For example, you can export behavioral cohorts from Amplitude to OneSignal to create dynamically responsive audiences. You can also send OneSignal engagement events back to Amplitude, initiating a cohesive data loop from one platform to the other.
See full documentation here for additional use cases, and instructions for integrating Amplitude and OneSignal.