About Proton Mail
Proton Mail is a Swiss-based end-to-end encrypted email service built for privacy. Founded by CERN scientists, it uses zero-access encryption so even Proton cannot read your emails. Fully open source and GDPR compliant, Proton Mail operates under strict Swiss privacy laws. It's part of the broader Proton ecosystem that includes VPN, Drive, Calendar, and Pass — offering a comprehensive privacy-focused alternative to Big Tech services.
Key Features
End-to-End Encryption
All emails between Proton Mail users are automatically end-to-end encrypted, ensuring only sender and recipient can read the content.
Zero-Access Encryption
Even Proton cannot decrypt or read your stored emails. Your data is encrypted with keys only you control.
Swiss Privacy Laws
Headquartered in Geneva, Switzerland, Proton Mail is protected by some of the world's strongest privacy laws, outside US and EU jurisdiction.
Open Source
All Proton Mail apps are fully open source and independently audited, allowing anyone to verify the security claims.
Custom Domains
Use your own domain name for a professional encrypted email address on paid plans.
Proton Mail Bridge
Integrates Proton Mail with desktop email clients like Outlook, Thunderbird, and Apple Mail via IMAP/SMTP bridge.
Proton Calendar
Encrypted calendar included with all plans, keeping your schedule private and synced across devices.
VPN Bundle
Proton Unlimited includes Proton VPN with servers in 60+ countries for complete online privacy.
15 GB Storage on Plus
Mail Plus plan includes 15 GB of encrypted storage for emails and attachments.
Pricing
- 1 GB storage
- 1 email address
- 150 messages per day
- 15 GB storage
- 10 email addresses
- Unlimited messages
- Custom email domains
- Desktop app via Bridge
- 500 GB storage
- 15 email addresses
- Proton VPN included
- Proton Drive included
- Proton Calendar included
- Proton Pass included
- 15 GB per user
- 10 email addresses per user
- Custom domains
- Admin panel
- Priority support
Featured In
7 Best Secure Email Providers for Privacy-Conscious Professionals (2026)
Best overall secure email — the strongest combination of encryption, usability, and privacy jurisdiction for professionals who need daily-driver encrypted email
Tuta vs Proton Mail: Which Private Email Service Is More Secure?
Most practical encrypted email — PGP interoperability, Swiss jurisdiction, and a complete privacy ecosystem make Proton the better all-around choice for usability and compatibility.
Best Email Security Tools With Anti-Phishing Protection (2026)
Best overall for anti-phishing protection combined with usability and end-to-end encryption.
Privacy Email Providers With the Best Calendar Integration (2026)
Best overall for users who want strong privacy *and* a mature, shareable calendar with good mobile apps — the default pick for most people leaving Google.
Best Identity Theft Prevention Tools for Seniors (2026)
Best for seniors with particularly sensitive email correspondence (estate, medical, financial) — a high-leverage single-purpose upgrade to pair with other tools.