[anon9001]

https://github.com/signalapp/Signal-Android

Can't I build and use this if I want? It looks very open, but I haven't tried building my own client.

[anoncake]

Free software is not about being able to compile and code Moxie Marlinspike allows you to use. It's about freedom that he opposes:

https://github.com/LibreSignal/LibreSignal/issues/37#issueco...

Yes, Signal's licensing complies to the letter of how we define free software. But that is irrelevant as it violates the spirit.