Firebase is from google, you can deploy your web-application using Angular for the front end and firebase for the end. Building backends with firebase is pretty easy, once you have learned how to do, it can be done in few minutes!
Many popular apps use Firebase as a backend. The beauty of firebase is it provides libraries for:
nmp install firebase --save
Which is the standard firebase library written in JavaScript!
npm install @angular/fire --save
Library for working with an angular 2+ app.