True, maybe https://github.com/firebase could help with some reverse engineering. However, I discovered the Firebase document and the deepstream.io record structure to be fairly similar, so with the help of https://github.com/firebase/firebase-queue the migration from Firebase to deepstream.io + RethinkDB might be possible. As a more general note, I would expect some of the stuff you mentioned to happen in the upcoming months/years, since Firebase is right now set to become the universal plattform for app devs (analytics, dynamic links etc.) rather than a standalone database offering.