End to End encryption free email service

ProtonMail is an end-to-end encrypted emailservice founded in 2014 at the CERN research facility by Andy Yen, Jason Stockman, and Wei Sun. ProtonMail uses client-side encryption to protect email contents and user data before they are sent to ProtonMail servers, unlike other common email providers such as Gmail and Outlook.com. The service can be accessed through a webmail client, the Tor network, or dedicated iOS and Androidapps.

ProtonMail is run by Proton Technologies AG, a company based in the Canton of Geneva,and its servers are located at two locations in Switzerland, outside of US and EUjurisdiction.The service received initial funding through a crowdfunding campaign. The default account setup is free, and the service is sustained by optional paid services. As of January 2017, ProtonMail had over 2 million users,and grew to over 5 million by September 2018. Initially invitation-only, ProtonMail opened up to the public in March 2016.