Vendor Profile

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.

Last updated February 28, 2026

Founded

2014

Pricing

From $8.99/user/month

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Deployment

Open SourceCloud

Email Encryption

HIPAAGDPRISO 27001

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

Pros & Cons

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)

Cons

–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

Best For

Privacy-conscious organizations needing zero-access encryption under Swiss law with optional HIPAA compliance

Community & Practitioner Evidence

Open Source Activity

GitHub

Stars

4.5k

Forks

480

Contributors

110

Open Issues

140

Last Push

Feb 2026

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