Proton Mail only uses secure implementations of AES, RSA, along with OpenPGP, while all of the cryptographic libraries used are open source. Proton Mail's open-source software has been thoroughly vetted by security experts from around the world to ensure the highest levels of protection.

This means we don't have the technical ability to decrypt your messages. Data is encrypted on the client side using an encryption key that Proton does not have access to.

Proton Mail's zero access architecture means that your data is encrypted in a way that makes it inaccessible to us. This largely eliminates the risk of message interception. Messages are stored on Proton Mail servers using end-to-end encryption at all times and are transmitted securely between Proton servers and user devices. Unmatched protection - We offer strong phishing, spam, and spying/tracking protection for all your communications.Proton is privacy, guaranteed by end-to-end and zero-access encryption. Rigorous encryption - Your entire inbox is secured, on all your devices.Your inbox is yours - We don’t spy on your communications to show you targeted ads.Easy to use - Our all-new app has been redesigned to make it easier to read, organize, and write your emails.Upgrade to a paid plan to get more done and support our mission. Proton Mail is free - We believe everyone deserves privacy.Send Password-protected Emails to anyone.Keep your inbox tidy and clean with folders, labels and simple swipe-gestures.Easily manage your email with conversations.Switch between multiple Proton Mail accounts.Send and receive encrypted emails and attachments with ease.With the all-new Proton Mail app, you can: “Proton Mail offers encrypted email, which makes it virtually impossible for anyone to read it except the sender and the recipient.” Used by millions worldwide, our all-new email app protects your communications and has everything you need to easily manage your inbox. Proton Mail is encrypted email from Switzerland.

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