ProtonMail is an end-to-end encrypted email service founded in 2013 in Geneva, Switzerland by scientists who met at the CERN research facility. ProtonMail uses client-side encryption to protect email content and user data before they are sent to ProtonMail servers, unlike other common email providers such as Gmail and Outlook.com ProtonMail secure encrypted email service review Our Verdict ProtonMail is an alternative web-based mailbox for sending secure communications using PGP, but it comes with a long list of caveats that might put people off signing up. Pricing ProtonMail has a free account with a ‘limited features’ that includes 150 messages per day, 500MB of storage and limited support. The first paid level is the Plus account costing $4.00 a month that allows you to send up to 1,000 emails a day, keep up to 5GB of emails in storage, have five email aliases and use your own domain name if required. There is also a bus