Ask HN: Preferred chat program compromise between security and UX?

Recently I've been needing to switch from iMessage to something supporting Linux. My wife and I previously used Telegram, however I've never been sold on their security model. However, they do have one of the better UXs. I've wanted to try something like Matrix, but not heard great things on its performance.

So I'm curious to hear what you use HN. What do you use, what platform are you on, and what do you like/dislike about it?

Appreciate any replies.