Photon looks interesting! I am not too familiar with it, but from what I understand Photon and WebRTC are for communicating messages between clients. Those mess

Photon looks interesting! I am not too familiar with it, but from what I understand Photon and WebRTC are for communicating messages between clients. Those messages can be very fast, because they aren't blocked by writes to disk. Instant has two similar services, Presence & Streams. The primary sync engine is more for storing relational data.