[tyfon]

I'm using Signal on my linux desktop right now. It appears to be a packaged webpage but it works fine and is linked to my phone and laptop.

All it require is a phone number, besides it's Snowden approved :)

[pmlnr]

You're using signal in a browser on your linux desktop. Poke me when there's any way to connect via bitlbee or libpurple, like there is for ICQ, jabber, etc.

[colordrops]

They lose all credibility when they force you to reveal your phone number. Doesn't matter who endorses it.

[LamaOfRuin]

They are entirely honest about their trade-offs. While those trade-offs may be deal-breakers for you, it should bolster their credibility.