protonmail
The website linked above is filled with false information. We have in fact attempted to reach the author and clarify this, but haven't heard back. Some of the points have been clarified here: https://web.archive.org/web/20210727224547/https://serpentsec.1337.cx/i-was-asked-to-review-an-article-from , as well as in direct communication with our users: https://www.reddit.com/r/ProtonMail/comments/d58cq1/protonmail_questions_and_concerns/
Regarding the recent revelations about surveillance, Proton users are not impacted, because we aren't considered a telecommunications service: https://proton.me/blog/court-strengthens-email-privacy (1/2)
@BlueKey At the time when this page was set up we were not using Mastodon actively. We will change that in the future.
@birdcat Please read the edited version of our response above, and accept our sincere apologies for sharing some links that were irrelevant to your original concerns: https://mastodon.social/@protonmail/111958985077770856.
The benefits of running Proton's services under Swiss legislation described in the article above remain correct.