ProtonMail also doxed Tom Spark during some controversy ( https://medium.com/@gaetanosabin/did-nordvpn-and-protonmail-violate-gdpr-and-us-privacy-laws-by-doxing-vpn-affiliate-2fe7b0d51d1f ) I'd just avoid anything Proton. I currently use CTemplar but obviously I still don't do anything critical over email.