Ist proton.me sicher?

An established service which already earned trust for years of clean, safe, focused work. Things are just done in so many cases: from independent security audits to lightweight UI. For example, UI straightforward beats Gmail UI (not in terms of connected services like calendar, but in terms of enjoying using specifically email). Person who wrote "on short hand with cia" and rated 3 below is from RU, but cannot use his own language with dignity (redneck) and is tech beginner (uses W10 tweaker instead of powershell scripts) - so likely just copy pasted opinion from indoctrination media which wants all people to have only RU domain mails for obvious reasons.