Proton Mail Business

Swiss-hosted zero-access encrypted email with the strongest privacy protections

ToolEmail EncryptionOpen SourceCloud

Pricing: Free and open source; paid tiers on the vendor site.

Reviewed by the CyberSecTool editorial team against the public sources cited below · Last reviewed February 2026 · How we review listings

What is Proton Mail Business?

Proton Mail Business provides zero-access end-to-end encrypted email hosted in Switzerland under some of the world's strongest privacy laws. Messages are encrypted on-device before reaching Proton's servers, meaning even Proton cannot read your email. For HIPAA-covered entities, Proton signs BAAs on its Business and Enterprise plans. The platform includes a full suite of privacy tools including Proton Calendar, Drive, and VPN.

Best for: Privacy-conscious organizations needing zero-access encryption under Swiss law with optional HIPAA compliance
Pros
  • ✓ Strongest privacy protections. Zero-access encryption
  • ✓ Swiss jurisdiction beyond US and EU reach
  • ✓ Open source and independently audited
  • ✓ Affordable per-user pricing
  • ✓ Complete privacy suite (mail, calendar, drive, VPN)
Considerations
  • • Non-Proton recipients see messages via secure portal
  • • Fewer enterprise admin features than competitors
  • • Migration from existing email providers can be complex
  • • Limited third-party integrations

Reported in public reviews and vendor documentation. See sources below.

Key Features

→Zero-access end-to-end encryption
→Swiss jurisdiction and data residency
→HIPAA-compliant with signed BAA (Business+)
→Open-source and independently audited
→Self-destructing messages
→Encrypted contacts and calendar
→Custom domain support
→Bridge app for Outlook, Thunderbird, Apple Mail

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Sources & references

Where the information on this listing comes from. Always verify pricing and capabilities against the vendor before a purchasing decision.

Proton Mail Business — official websitePrimary source
Proton for Business — Secure business solutions
Official site
Proton Mail — Wikipedia
Wikipedia
Proton completes SOC 2 Type II audit to support business security
Official blog

Spot an error, or do you represent Proton Mail Business? Request a correction.

Quick Info
PricingFree and open source; paid tiers on the vendor site.
ModelPer-user
Founded2014
CloudYes
Self-HostedNo
Open SourceYes
Visit Website →View on GitHub →

Last updated: Feb 25, 2026

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Certifications
HIPAAGDPRISO 27001