Huh? WhatsApp is by far the biggest, with Telegram trailing a distant second place, and other messengers even further behind. There is a case for counting Facebook Messenger as second place, but afaik the only reason most people even use it (and they do it begrudgingly) is because Facebook forces them by excluding messaging from the main app.
Re:Threema – Seriously secure messaging
by fencepost on Sunday January 06, 2019 @03:53PM
(#18840642)
I phrased it badly, and I have a slightly odd niche - when I last looked at this a few years ago I was trying to find ways to get doctors to stop sending group SMS messages between themselves for patient handoffs.
At the time there wasn't much out there, and nothing run by Facebook was even going to pass the initial sniff test as an option.
You can use a third party Facebook app like Material or Tinfoil Hat that has messaging built in by simulating an old web browser. It's a little clunky but it at least isn't always running and has no access to your address book or contacts.
The downside that you get no alerts someone responded but I like it. I check on my own time.
On the upside, I like that they have a business model ("Threema Work") and features that can make it viable for business use, though being European I don't know if they've bothered with anything related to HIPAA and I wouldn't expect them to support BAAs if required.