Google Cloud Messaging vs Pushover: What are the differences?
Developers describe Google Cloud Messaging as "Simple and reliable messaging to reach over a billion devices". Google Cloud Messaging (GCM) is a free service that enables developers to send messages between servers and client apps. This includes downstream messages from servers to client apps, and upstream messages from client apps to servers. On the other hand, Pushover is detailed as "Real-time notifications on your Android, iPhone, iPad, and Desktop". Pushover is a platform for sending and receiving push notifications. On the server side, we provide an HTTP API for queueing messages to deliver to devices addressable by User or Group Keys. On the device side, our iOS, Android, and Desktop clients receive those push notifications, show them to the user, and store them for offline viewing.
Google Cloud Messaging and Pushover can be categorized as "Mobile Push Messaging" tools.