> WhatsApp, Signal and Telegram WhatsApp and Telegram I can understand but Signal is a bit strange, they probably could just have setup some way to have "Swiss

> WhatsApp, Signal and Telegram WhatsApp and Telegram I can understand but Signal is a bit strange, they probably could just have setup some way to have "Swiss army compiled" version of Signal which IMHO would be more safe then Threema. While I do use Threema and like it's decoupling from phone numbers it has problems including Salamander attacks on their group chats and a very easily DDOS able account creation system. Furthermore most other users I meet did for a long time not know about the importance of Threema Id backups, often until they switched phones and lost their Threema Id... Generally from what I can tell it _seems_ (i.e. speculation) to be developed from experienced software engineers, but missing some "full-on security experts/researchers(1)" and there is in my experience a subtle but for this kind of things important gap between a senior engineer with a lot of security expertise and a non-junior full-on security expert/researcher. (1): What I mean hear is a bit tricky to define. First security experts and researchers are not necessary the same then different people have different field of expertise and skill level, so just doing it full time isn't necessary enough.