ProtonMail is an encrypted email service founded in 2014 by scientists from CERN and MIT. It's based in Switzerland, which has strong privacy laws, and is known for its focus on security and privacy.

ProtonMail uses end-to-end encryption, which means that only the sender and recipient of an email can read its contents. The encryption keys are generated on the user's device, so ProtonMail doesn't have access to them. This makes it virtually impossible for anyone, including ProtonMail, to access the content of your emails.

In addition to its strong security features, ProtonMail offers a user-friendly interface, mobile apps, and features such as custom domains and a built-in VPN. It also has a free plan with limited features and storage, as well as paid plans with additional features and storage.
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