I think Firebase is a closed source program that can only be used via "the cloud", i.e., via a web application. It's not something you can run yourself. In c

I think Firebase is a closed source program that can only be used via "the cloud", i.e., via a web application. It's not something you can run yourself. In contrast, RethinkDB+Horizon would have soon provided similar functionality to Firebase, but with the option of self hosting.