OneSignal

OneSignal is a customer engagement platform that enables developers, marketers, and product teams to engage and retain customers through email, mobile push, web push, SMS, in-app messages, and endless other channels via Webhooks. Designed to empower cross-channel communication via transactional and marketing messages, OneSignal offers tools such as customer journeys, A/B testing, analytics, personalization, and segmentation based on user behavior, demographics, preferences, and more.

OneSignal has integrations for common analytics, data, and publishing platforms, and SDK wrappers for the common iOS and Android programming languages. The platform also has rest API endpoints to support any technical stack integration, making it easy to streamline workflows.