zlacker

Related question, is there an endorsement from a recognised expert? I'd have to live with that since I won't be getting an advanced degree in cryptography.

>>lordna+(OP)
There are some there: https://www.signal.org/

tptacek regularly endorses Signal (compared with alternatives) on HN.

>>hiq+jd
Heh, I'd never even looked at the website. The four people they have there seem good enough for me. At least Schneier, Green, and tptacek seem to be technical enough, and the others will have big enough need to have done the due diligence properly.