Firebase Cloud Messaging provides a reliable and efficient connection between servers and devices, allowing for the delivery and reception of messages on mobile devices. This cross-platform messaging solution lets app developers reliably deliver messages to app users at no cost.
OneSignal is a push notification software with numerous features such as A/B testing, real-time reporting, and can be scaled to fit the largest apps. OneSignal can send push notifications across numerous platforms including mobile, web-based, In-App, and email notifications.
Pushwoosh lets you engage with customers and raise conversion rates in your applications with new digital marketing strategies. Pushwoosh combines push notifications with other communication channels to increase revenue and user LTV. A free trial is avaiable to give a better understanding via the company home page.
Pubnub allows developers to quickly implement secure, collaborative features in a variety of realtime apps that have gained massive traction. It helps apps reflect any source of live data, from mapping, geotracking and dispatch, to broadcasting push notifications. Pubnub is available for iOSand Android apps.
Amazon Device Messaging (ADM) lets you send messages to Amazon devices that run your app, so you can keep users up to date and involved. Whether you're giving a user a game update or letting them know that a message from their buddy has arrived, Amazon Device Messaging (ADM) helps you stay in touch.