On "Proton" such as Proton Mail from the World Economic Forum site (!!):

Proton
Proton was started in Switzerland in 2014 by scientists who met at the European Organization for Nuclear Research (CERN).

Its vision is to build an internet where privacy is the default through an ecosystem of services accessible to everyone, everywhere, every day.

Over 50 million people from over 180 countries have signed up to use Proton products such as ProtonMail, ProtonVPN and Proton Drive.