I've been using ProtonMail for a couple of years. iOS client is usable and works fine. Web interface works fine with any browser I tried, including on Linux. I

I've been using ProtonMail for a couple of years. iOS client is usable and works fine. Web interface works fine with any browser I tried, including on Linux. I had problems with Bridge on MacOS, but after learning that Apple Mail is reporting all e-mail metadata to Apple I stopped using it altogether. Don't know if ProtonMail fixed Bridge since then.