Founded
N/A
Starting Price
$0
Category
Email Clients
Last updated April 21, 2026
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.
Pricing
Free
$0/month
- 1 GB storage
- 1 email address
- 150 messages per day
Mail Plus
$3.99/month
Featured In
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#2
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Most practical encrypted email — PGP interoperability, Swiss jurisdiction, and a complete privacy ecosystem make Proton the better all-around choice for usability and compatibility.