OneSignal

OneSignal is the market-leading customer messaging and engagement solution, offering mobile and web push notifications, in-app messaging, SMS, and email. Their powerful multi-channel platform enables one million businesses to deliver over 8 billion messages daily. Powered by superior architecture, OneSignal is designed to scale with your business and deliver messages more quickly and reliably than the competition. By providing an open API, extensive documentation, free accounts, and intuitive personalization and analytics tools, they help businesses of all sizes provide a seamless messaging experience to create meaningful customer connections.