ProtonMail is rated 3.7 out of 5 in the category accounting firm. Read and write reviews about ProtonMail. ProtonMail is an end-to-end encrypted email service founded in 2014 at the CERN research facility by Andy Yen, Jason Stockman, and Wei Sun.,ProtonMail is a Swiss-based secure email service, brought to you by CERN and MIT scientists. We provide free and easy-to-use encrypted email. We protect your privacy and ensure that nobody, not even us, can read your communications. Our end-to-end encryption is completely seamless so there are no extra steps before you can start emailing securely.,ProtonMail is an end-to-end encrypted email service founded in 2014 at the CERN research facility by Andy Yen, Jason Stockman, and Wei Sun.