Proton Mail

Proton Mail provides the most secure business email available — end-to-end encrypted, hosted under Swiss privacy laws, and built by scientists from CERN and MIT who designed the platform specifically to prevent unauthorized access to your communications. For businesses, law firms, healthcare organizations, journalists, and activists who handle sensitive information, Proton Mail offers a level of privacy protection that no other email provider can match.

End-to-end encryption means that emails between Proton Mail users are encrypted on the sender's device and can only be decrypted by the recipient. Even Proton cannot read the content of these emails. For communications with non-Proton users, password-protected messages provide a secure channel through any email provider.

Zero-access encryption protects stored emails so that even if Proton's servers were compromised, the attacker would obtain only encrypted data that cannot be decrypted without the user's credentials. This architectural decision was a founding principle of Proton Mail, designed in direct response to the mass surveillance revelations that motivated the platform's creation.

Swiss privacy jurisdiction provides additional protection. Switzerland has some of the strongest privacy laws in the world and is not subject to EU or US data access requests. Proton Mail has a proven track record of protecting user privacy under Swiss law, including court challenges.

Custom domain support allows businesses to use their own domain with Proton Mail's encryption infrastructure. All inbound and outbound email through the custom domain is protected with the same end-to-end encryption, and the admin panel provides user management, security policy enforcement, and organizational controls.

ProtonVPN is included with business plans, providing secure internet access for employees working remotely or on public networks. The combination of encrypted email and VPN creates a comprehensive communication security solution.

Pricing starts at 3.99 USD per user per month for the Mail Essentials plan with 15GB storage. The Business plan at 6.99 USD per user per month adds more storage, VPN, and priority support.