I’ve been using Tuta, and while I like them as a company and for their privacy, it bothers me that I have to use their email client. It increases switching costs for me because I can’t use the same client as my previous as I switch. I also don’t like the client. I understand why they do it - to control privacy, but I don’t see why I shouldn’t have the choice and why for example using Thunderbird doesn’t still comply with that.
I don’t trust proton because of its right wing expressions. Infomaniak is (to my knowledge) not focusing on privacy.