[Chlorus]

Wasn't Apple's iMessage protocol supposed to be an open implementation too? Whatever happened to that?

[kitsunesoba]

That was FaceTime that they intended to open source, and it was supposedly a patent troll that forced them to move FaceTime to a more centralized design (it was originally P2P) which in turn made open sourcing more problematic.

[smnrchrds]

That was certainly the excuse. But it is trivial for Apple to buy any patent it needs. I believe the real reason is that FaceTime and iMessage hook people to Apple platform and discourage switching to another one.

[meepmorp]

No, but even if you were right, what would that have to do with Signal?