Number one on our list, ProtonMail is by far the best secure email service.
ProtonMail, based in a security centre in Switzerland, was developed by scientists from the The service was launched in 2013 and has received excellent reviews, not only for its encryption and security factors, but also for its ease of use.
Setting up a ProtonMail account is as simple as setting up an email address with Gmail or Outlook.
In terms of security:
Proton mail has end-to-end encryption. This means that every message sent from your ProtonMail account is protected from the moment you press send until the message is opened.
Moreover, it can only be viewed by the sender and the recipient.
Once received, the message is stored on ProtonMail’s private servers, only the sender (who has the public key) and the recipient (who has the private key), can read the message. Not even ProtonMail can read it.
You can also set an expiry time for encrypted emails that will be automatically deleted from the recipient’s inbox once they have expired.
Of course, end-to-end encryption only works really well if you send an email to other ProtonMail users.
For this reason, ProtonMail also supports sending mail to non-ProtonMail users (Gmail, Yahoo! Mail, Outlook, Apple Mail, and even AOL Mail), while providing the same type of encryption expected from their service.
These users will receive an encrypted link instead of the email, which they can decrypt using a passphrase that you have given them in private.
And, of course, you can also send unencrypted e-mails to these users.
As we have mentioned, ProtonMail strives to make its service easy to use.
There is no software to install on your computer, and no tricky configuration process.
In addition, ProtonMail offers applications for Android and iOS, both of which are well designed.
And last but not least, ProtonMail does not require any personal information to register.