Fluffychat (matrix), Deltachat seem really good but good luck getting anyone to change. Let us know if you figure out a way to persuade people they should make any effort or try something new.

I use Mistral Ai instead because I don’t touch and US products or services. The most common thing I ask is: check and tidy up these notes add formatting for readability, present as a markdown code block, add some nerd fonts.