Best HIPAA compliant email providers
6 tools compared. Checked 6 Nov 2026.
Email often carries patient details, so the main question is whether your plan comes with a BAA.
Where to start
Start with Paubox, which includes a BAA with all accounts at no additional charge. If you already use Google Workspace or Office 365, check Gmail or Outlook first, since you may be able to stay where you are.
| Tool | Result | Where the BAA applies |
|---|---|---|
| PPaubox | BAA available | All accounts, no extra charge |
| PProton Mail | BAA available | All users, signed on request |
| GGmail | On some plans | Google Workspace with the BAA accepted |
| HHushmail | On some plans | Healthcare and Professionals plans |
| OOutlook | On some plans | Exchange Online on Office 365 |
| ZZoho Mail | Not clear | On request; plans not stated |
Paubox
BAA availablePaubox says a BAA is included with all accounts at no additional charge.
Covered: Paubox Email Suite Standard; Paubox Email Suite Plus; Paubox Email Suite Premium; Paubox Mailbox; Paubox Marketing, including Free and Pro.
See the full Paubox result and proofProton Mail
BAA availableProton says it offers a BAA to all Proton users and signs it on request by email.
Covered: Any Proton user per Proton’s statement; plan tiers are not itemized.
See the full Proton Mail result and proofGmail
On some plansGmail is listed under Google’s BAA for Google Workspace customers, and an administrator must review and accept the BAA in the Admin console before any PHI is used.
Covered: Google Workspace accounts with the BAA accepted; Google’s pages do not list qualifying editions.
Left out: Third-party applications and add-ons, and more.
See the full Gmail result and proofHushmail
On some plansHushmail includes a BAA on its Healthcare and Professionals plans and marks its Small Business, Law and Personal plans as having no BAA.
Covered: Hushmail for Healthcare Basic; Hushmail for Healthcare Essentials; Hushmail for Healthcare Growth; Hushmail for Professionals.
See the full Hushmail result and proofOutlook
On some plansMicrosoft includes its HIPAA BAA by default through its Data Protection Addendum for covered entity and business associate customers, and lists Exchange Online as in scope for Office 365 Commercial and GCC.
Covered: Exchange Online under Office 365 Commercial; Exchange Online under Office 365 GCC.
Left out: Copilot web search queries are outside the DPA and BAA.
See the full Outlook result and proofZoho Mail
Not clearZoho says customers can request its BAA template by email, but it does not say which Zoho Mail plans qualify.
See the full Zoho Mail result and proofBefore you choose
- Confirm the BAA covers your exact plan and every feature you’ll use.
- Get the BAA signed before any patient data goes in.
- Turn on the settings the vendor requires, and train your staff on them.
This isn’t legal advice. A BAA is one requirement. Your clinic still has to set the tool up correctly and control who has access. Vendors change their terms, so confirm before you sign. PHI means protected health information, which includes patient data.