Which server does Firebase use?

Firebase includes an easy-to-use hosting service for all of your static files. It serves them from a global CDN with HTTP/2 . And to make your development particularly painless, Firebase hosting utilizes Superstatic, which you can run locally for all of your testing.24 Eki 2016

FCM supports HTTP and XMPP protocols that are virtually identical to the GCM server protocols, so you don’t need to update your sending logic for the migration.

FCM, or Firebase Cloud Messaging works by keeping a connection open towards the Google servers from your phone . This connection listens to messages from Google servers and takes action on your phone when messages are received.

In this architecture, Firebase sits between the server and clients . Your servers can connect to Firebase and interact with the data just like any other client would. In other words, your server communicates with clients by manipulating data in Firebase.25 Mar 2013

Firebase Cloud Messaging (FCM), formerly known as Google Cloud Messaging (GCM), is a cross-platform cloud solution for messages and notifications for Android, iOS, and web applications , which as of 2021 can be used at no cost.

The server side of Firebase Cloud Messaging consists of two components: The FCM backend provided by Google. Your app server or other trusted server environment where your server logic runs, such as Cloud Functions for Firebase or other cloud environments managed by Google.

Android, and the Web. Firebase provides detailed documentation and cross-platform SDKs to help you build and ship apps on Android, iOS, the web, C++, and Unity .