[ValentineC]

> It’s not a “walled” service like iMessage or FaceTime is.

Steve Jobs promised that FaceTime would be open source… eventually: https://www.cnet.com/news/steve-jobs-promised-to-make-faceti...

Any time now.

[saagarjha]

It’s walled because of patent litigation with VirnetX, not because Apple wanted to keep it walled.