Proton Mail is an end-to-end encrypted email service based in Switzerland, founded in 2013 by scientists from CERN. All emails are stored with zero-knowledge encryption — meaning even Proton cannot access the contents of messages. It offers a clean, privacy-focused email experience with support for custom domains, email aliases, calendar, VPN, and cloud storage as part of the Proton ecosystem. Popular with journalists, activists, and privacy-conscious users worldwide as a Gmail alternative.
Proton Mail
End-to-end encrypted email for privacy-conscious users.
Best for: Privacy-conscious individuals and organisations who want end-to-end encrypted email with guaranteed privacy.
- Free plan
4.6/5 ratingEditorial score 91/100proton.me
The editorial note
What to know about Proton Mail
Is it right for you?
Who Proton Mail suits
Choose it if
- Privacy-conscious individuals and organisations who want end-to-end encrypted email with guaranteed privacy.
Look elsewhere if
- Power users needing deep Gmail ecosystem integration, Google Workspace collaboration, or extensive third-party app connectivity — Gmail's ecosystem is significantly broader for professional team environments
What you get
Key features
- End-to-end encrypted email
- Zero-knowledge architecture
- Custom domain support
- Email aliases
- Proton Calendar
- Proton VPN integration
- Proton Drive integration
- PGP compatibility
Works with
Integrations7
Proton VPNProton CalendarProton DriveProton PassCustom domainsPGP key supportBridge (IMAP/SMTP for desktop clients)
What it costs
Pricing
| Plan | Price | What it includes |
|---|---|---|
| Free | FreeBilled monthly | 1 email address, 1GB storage, 150 messages/day, end-to-end encryption |
| Mail Plus | $3.99 / monthBilled monthly | 10 addresses, 15GB storage, custom domain, auto-reply, folders, priority support |
| Proton Unlimited | $9.99 / monthBilled monthly | Proton Mail + VPN + Drive + Calendar, 500GB storage, 15 addresses, 3 custom domains |
| Proton Business | $6.99 / user / monthBilled monthly | Business email, custom domain, admin console, team management, priority support |
Prices are recorded from the vendor's public pricing page and can change. Check before you buy.
The trade-off
Pros and cons
Pros
- End-to-end encryption by default — Proton cannot read your emails even under legal pressure
- Swiss jurisdiction with strong privacy laws provides better data protection than US-based services
- Zero-knowledge encryption means even metadata protection is emphasized
- Proton ecosystem offers email, VPN, calendar, and cloud storage under one privacy umbrella
- Automatic encryption between Proton users requires no setup or key management
Cons
- Free plan limited to 1GB storage and 150 messages per day — needs paid plan for practical use
- Less integration with third-party apps than Gmail — limited IMAP/SMTP access on free plan
- Encrypted email loses format and readability when sent to non-Proton recipients using PGP
- Mobile apps are functional but have fewer features than Gmail's mature mobile experience
Quick read
At a glance
- Category
- Cybersecurity & Privacy
- Pricing model
- Freemium
- Entry plan
- Free
- Free plan
- Available
- Free trial
- Not listed
- Website
- proton.me
The verdict
Our take on Proton Mail
The most trustworthy email provider — end-to-end encryption and Swiss law protection make Proton Mail the privacy standard.
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