Proton Mail Business vs Paubox
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.
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)
Things to check
- 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
Pricing: Free and open source; paid tiers on the vendor site.
Paubox
Paubox is a HIPAA-compliant email encryption platform purpose-built for healthcare organizations. It encrypts every outbound email by default using TLS with automatic fallback to a secure portal, so recipients read messages in their normal inbox without passwords or portals. Paubox is HITRUST CSF certified and signs BAAs, making it the go-to choice for hospitals, health systems, and medical practices that need frictionless HIPAA-compliant email.
Pros
- No portal login required for recipients
- HITRUST CSF certified. Highest bar for healthcare
- Zero learning curve for senders
- Purpose-built for healthcare compliance
- Includes inbound email security
Things to check
- Premium pricing for smaller practices
- Less granular sender control than end-to-end solutions
- Healthcare focus may not fit all industries
- No on-premise deployment option
Pricing: From $29/user/month