Ubiquitous but not private
Audited
⭐ Top Pick
Proton Mail
Secure email that protects your privacy
Open Source
E2E Encrypted
Zero Knowledge
No Logs
Audited
Free / $4.99/mo
Free tier available. Mail Plus $4.99/mo ($3.99 yearly). Proton Unlimited $12.99/mo ($9.99 yearly) includes VPN, Drive, Pass. Business from $6.99/user/mo.
Visit Proton Mail →
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Quick Specs
| Open Source | ✓ Yes View code |
|---|---|
| E2E Encrypted | ✓ Yes |
| Zero Knowledge | ✓ Yes |
| Self-Hostable | ✗ No |
| No Logs Policy | ✓ Yes |
| Audited | ✓ Yes |
| Jurisdiction | Switzerland |
| Pricing | Freemium |
About Proton Mail
Proton Mail provides end-to-end encrypted email built on zero-knowledge architecture. Based in Switzerland, it operates under some of the strongest privacy laws in the world. The service cannot read your emails—even if compelled by authorities, they have nothing to hand over. Includes calendar, cloud storage, and VPN as part of the ecosystem.
Best For
Organizations handling sensitive communications who need email encryption without technical complexity. Particularly suitable for legal services, healthcare advocacy, and journalism.
Our Take
A solid foundation for organizational email security. The zero-knowledge architecture means your communications are protected even from the service provider. Swiss jurisdiction adds legal protection against foreign data requests. The integrated ecosystem (Calendar, Drive, VPN) reduces the number of vendors you need to trust.
Security Considerations
A tool is only as effective as its implementation. Consider these factors:
- Configuration matters: Default settings may not match your threat model. Review security options carefully.
- Training is essential: Tools protect nothing if your team doesn't use them correctly or consistently.
- Integration points: Consider how this tool connects with your existing systems and what data flows between them.
- Continuity planning: Ensure you have backup access methods and know the recovery process.
Need help implementing this securely? Take our free assessment or book a discovery call.
Zero-knowledge encryption under Swiss privacy law. Cannot read your email even if compelled.
Score Breakdown
🔒
Data Access
20/20
Can the provider access your data?
👁️
Transparency
15/20
Can security claims be verified?
🎛️
Control
9/15
Do you own and control your data?
⚖️
Jurisdiction
15/15
What legal protections apply?
💰
Business Model
18/20
Are incentives aligned with privacy?
📊
Track Record
10/10
History of security and trust
💰 Business Model
Freemium subscriptions. No ads or data monetization. Privacy-focused since founding.
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