Best Email Encryption Software for HIPAA Compliance in 2026
Email encryption software protects sensitive messages in transit and at rest, ensuring that only intended recipients can read them.
8 Email Encryption Software Tools, side by side
| Tool | Deployment | Pricing model | Open source |
|---|---|---|---|
| Paubox | Cloud | Per-user | — |
| Virtru | Cloud | Per-user | — |
| LuxSci | Cloud | Per-user | — |
| Zix (OpenText) | Cloud + Self-hosted | Per-user | — |
| Egress | Cloud | Per-user | — |
| Proton Mail Business | Cloud | Per-user | Yes |
| Echoworx | Cloud + Self-hosted | Per-user | — |
| Tuta | Cloud | Per-user | Yes |
For healthcare organizations, HIPAA requires that protected health information (PHI) sent via email is encrypted and that a Business Associate Agreement (BAA) is in place with the vendor. These tools range from seamless TLS gateways to full end-to-end encryption with persistent sender control.
By use case
Our read on which tool suits which job. Editorial, not paid, and separate from the listing below.
Healthcare organizations that need HIPAA-compliant email encryption with zero friction for recipients and HITRUST CSF certification
Paubox
The top choice for healthcare organizations. HITRUST CSF certified, seamless TLS encryption means recipients read messages in their normal inbox without portals or passwords. Signs BAAs and includes inbound email security.
Cloud
Healthcare and government teams using Gmail or Outlook who need HIPAA-compliant end-to-end encryption with persistent sender control
Virtru
Best for organizations using Gmail or Outlook who need end-to-end encryption with persistent sender control. Senders can revoke access, set expiration dates, and audit every access event. Signs BAAs for HIPAA compliance.
Cloud
Healthcare organizations wanting combined HIPAA-compliant email hosting and encryption from a single vendor
LuxSci
The best option when you need both email hosting and encryption from a single HIPAA-compliant vendor. Supports multiple encryption methods (TLS, portal, PGP, S/MIME) with dedicated per-customer infrastructure.
Cloud
Large enterprises in healthcare and finance needing proven, policy-based email encryption at scale with deep compliance support
Zix (OpenText)
Best for large enterprises needing a proven platform at scale. The largest install base in email encryption means ZixDirectory enables frictionless encrypted delivery between thousands of organizations. Strong HIPAA, PCI DSS, and SOX compliance.
Cloud, Self-hosted
Organizations wanting AI-driven email encryption that adapts protection levels based on content and recipient risk
Egress
Best for organizations wanting intelligent, adaptive encryption. AI-powered risk scoring adjusts protection levels per email based on content and recipients, reducing both over-encryption and security gaps.
Cloud
Privacy-conscious organizations needing zero-access encryption under Swiss law with optional HIPAA compliance
Proton Mail Business
Best for privacy-first organizations. Zero-access encryption under Swiss jurisdiction means even Proton cannot read your email. Signs BAAs on Business and Enterprise plans for HIPAA-covered entities.
Open source, Cloud
Large enterprises needing maximum flexibility in email encryption delivery methods with branded secure portals
Echoworx
Best for enterprises needing maximum delivery flexibility. Seven encryption methods and brandable secure portals ensure messages reach any recipient securely. Strong compliance across HIPAA, SOC 2, and ISO 27001.
Cloud, Self-hosted
Privacy-focused teams wanting open-source, end-to-end encrypted email at an affordable price under EU jurisdiction
Tuta
Best for privacy-focused teams on a budget. Fully open-source, end-to-end encrypted, and affordable. However, Tuta does not sign HIPAA BAAs, making it unsuitable for HIPAA-covered entities handling PHI.
Open source, Cloud
Paubox
Email SecurityHealthcare organizations that need HIPAA-compliant email encryption with zero friction for recipients and HITRUST CSF certification
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.
Virtru
Email SecurityHealthcare and government teams using Gmail or Outlook who need HIPAA-compliant end-to-end encryption with persistent sender control
Virtru provides end-to-end encryption for email and files across Gmail, Outlook, and Google Workspace. Built on the Trusted Data Format (TDF) open standard, Virtru gives senders persistent control over encrypted messages. Including the ability to revoke access, set expiration dates, and disable forwarding after sending. Virtru signs BAAs for HIPAA compliance and offers granular audit logging of every access event.
LuxSci
Email SecurityHealthcare organizations wanting combined HIPAA-compliant email hosting and encryption from a single vendor
LuxSci provides HIPAA-compliant email hosting and encryption as a combined service, eliminating the need for separate email and encryption vendors. It offers multiple encryption methods. TLS, portal pickup, PGP, and S/MIME. With policy-based automation that selects the right method per message. LuxSci signs BAAs and provides dedicated infrastructure for healthcare organizations that need both email hosting and encryption under one HIPAA-compliant umbrella.
Zix (OpenText)
Email SecurityLarge enterprises in healthcare and finance needing proven, policy-based email encryption at scale with deep compliance support
Zix, now part of OpenText, is one of the longest-established email encryption platforms with a massive install base across healthcare, finance, and government. Zix provides policy-based encryption that automatically secures emails containing sensitive data, using TLS and a secure portal fallback. Its ZixDirectory enables direct encrypted delivery between Zix customers without portal friction. Zix signs BAAs and meets HIPAA, PCI DSS, and SOX requirements.
Egress
Email SecurityOrganizations wanting AI-driven email encryption that adapts protection levels based on content and recipient risk
Egress provides intelligent email security that combines adaptive encryption with AI-powered risk detection. Rather than applying blanket encryption rules, Egress analyzes each email's content, recipients, and context to dynamically determine the right level of protection. From automatic TLS to full end-to-end encryption. Now part of KnowBe4, Egress signs BAAs for HIPAA compliance and is widely used in healthcare, legal, and financial services.
Proton Mail Business
Email SecurityPrivacy-conscious organizations needing zero-access encryption under Swiss law with optional HIPAA compliance
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.
Echoworx
Email SecurityLarge enterprises needing maximum flexibility in email encryption delivery methods with branded secure portals
Echoworx is an enterprise email encryption platform that supports seven different encryption methods to match any recipient's capability. From TLS and portal to PGP, S/MIME, and PDF encryption. Designed for large organizations in regulated industries, Echoworx provides policy-driven automation, brandable secure portals, and integrations with Microsoft 365, Google Workspace, and on-premise mail servers. Echoworx signs BAAs for HIPAA-covered entities.
Tuta
Email SecurityPrivacy-focused teams wanting open-source, end-to-end encrypted email at an affordable price under EU jurisdiction
Tuta (formerly Tutanota) is an open-source, end-to-end encrypted email provider based in Germany. Every email, contact, and calendar entry is encrypted at rest with zero-access architecture. Tuta uses its own encryption protocols rather than PGP, encrypting subject lines in addition to message bodies. While primarily focused on GDPR compliance and personal privacy, Tuta's business plans offer custom domains, team management, and whitelabel options.
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About this listing
Email Encryption Software tools, compared on public information. The comparison table and the full entries follow our editorial order, with any paid Featured listing shown first and labelled. How we work →