I read a really thoughtful article this morning interviewing the current president of Signal, Meredith Whittaker. The interview covers her history and how she came stand for privacy as well as how her work at Signal is truly to invent a nonprofit model for an alternative tech industry that doesn't rely on data brokering and surveillance. Take a look here:
https://archive.is/AlcdN
(I usually find WIRED to be surface-level at
best, so I was pleasantly surprised to see the quality of this article. that said, I dont have a subscription, so the archive link should get around the paywall

)