You should be aware that a lot of governments actively try to track activity on the tor network, meaning it may in some cases draw more attention to you than just accessing the site normally. ProtonMail offers a hidden tor site, also known as an onion site, that can be accessed over the tor network for connection and IP address anonymity. This means that ProtonMail can’t access or analyse your emails at all, or hand over that data.

Messages between ProtonMail accounts are encrypted from end to end and all emails are encrypted when stored on ProtonMail’s servers.

You should make sure that your email address doesn’t include any identifying information and that you don’t reuse the handle of another email address with ProtonMail as this could be used to link the two accounts. This anonymity only goes so far though, if you want true privacy you should practice proper OPSEC, or Operational Security. ProtonMail doesn’t require any personal details to sign up, so your account is essentially anonymous. Details of the cases that they did and did not provide information for can be found in their transparency report. While this does happen occasionally, ProtonMail also pushes back on many cases that they object to. ProtonMail cannot legally comply with a court order from a foreign government unless the Swiss government approves it. As ProtonMail is based in Switzerland it is subject to Swiss laws that are well known to be very pro-privacy.

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