Realtime - Firebase, Meteor, GUN[0], PouchDB. People should NOT consider Kinto, RethinkDB, and Parse as realtime because you have to manually add that functiona

Realtime - Firebase, Meteor, GUN[0], PouchDB. People should NOT consider Kinto, RethinkDB, and Parse as realtime because you have to manually add that functionality yourself. Permissions/Auth - Firebase, Parse. The way these two services do permissions is very different than everybody else (correct me if I am wrong). Therefore others are not comparable. Graph - GUN. I think this is an important comparison for people to think about, all the other databases are essentially document stores. Graph data allows you to do key/value, relational, document oriented data, as well as have circular references. [0] http://github.com/amark/gun http://github.com/amark/gun Full disclosure: I'm the author.