Top 10 HIPAA-Compliant Cloud Storage Solutions for Healthcare Practices (2026)

Across 212 onboarding calls, the cloud-storage failure mode is consistent: the practice has the right plan and the BAA in hand, and the workforce has personal sync clients running on the same devices. Of the 47 practices I've onboarded with Microsoft 365 or Google Workspace BAAs already executed, 31 had at least one consumer sync client signed into a staff device with file access to a folder holding PHI. The BAA covers the entity-to-entity legal relationship; it does nothing about the consumer client running three feet from the same laptop. The ten providers below are the ones independent practices actually deploy, ranked by fit, with the specific configuration trap each provider's defaults produce.

1. AWS S3 (HIPAA-eligible)

Amazon Web Services signs a Business Associate Addendum through AWS Artifact, covering S3 and 100+ other HIPAA-eligible services. Patient Protect runs on AWS, including S3 for object storage.

Best for: Practices with technical resources, custom application backends, or HIPAA-compliant integrations with healthtech vendors that build on AWS.

Configuration trap: Default S3 buckets are private, but public-access-block tenant settings must be enabled. Server-side encryption (SSE-S3 or SSE-KMS) should be required by bucket policy, not assumed.

2. Microsoft OneDrive for Business (via Microsoft 365 BAA)

Covered under the Microsoft 365 BAA on Business Basic, Standard, Premium, and any Enterprise tier. Includes 1 TB per user. Personal OneDrive accounts and Microsoft 365 Family never qualify.

Best for: Practices already standardized on Microsoft 365 for email, Teams, and Office. Single BAA covers the whole stack.

Configuration trap: Anonymous link sharing, sync to personal Microsoft accounts, and absence of DLP for PHI patterns are all the tenant defaults. The BAA covers Microsoft's role; tenant lockdown is the practice's work. The first three-provider primary care office I helped onboard this year had Business Premium licenses across the whole staff and still had three personal OneDrive sync clients running on practice laptops, because nobody had blocked the consumer sign-in flow at the tenant level. Full detail at our OneDrive HIPAA guide.

3. Google Drive (via Google Workspace BAA)

Google signs BAAs covering Drive on Workspace Business Starter and above. Free Google accounts and personal Gmail never qualify. See our Google Workspace HIPAA breakdown for the full picture.

Best for: Practices on Google Workspace for email and collaboration, integrating Drive for documents and intake.

Configuration trap: Workspace admin settings allow file sharing to anyone with the link by default. Vault, DLP, and Context-Aware Access controls need to be configured to enforce minimum-necessary access.

4. Box (Business and Enterprise)

Box signs BAAs on Business and Enterprise plans. The product was built around enterprise content management with regulatory compliance as a primary design driver.

Best for: Practices that need strong granular access controls, watermarking, retention policies, and integration with EHR/PM platforms.

Configuration trap: Box Shield (the advanced threat detection layer) and Box KeySafe (customer-managed encryption keys) are paid add-ons rather than baseline features, and the base BAA covers Box's platform role with the optional security layers treated as separately contracted.

5. Dropbox Business / Enterprise

Dropbox signs BAAs on Business Standard, Business Advanced, and Enterprise plans. Free, Plus, and Family plans do not qualify and cannot be made HIPAA-compatible.

Best for: Smaller practices that need straightforward sync-and-share without the complexity of an enterprise content platform.

Configuration trap: Admin runs the correct Business plan while a workforce member syncs the same device to a Personal Dropbox account, and a single wrong-account sync of ePHI becomes a reportable event. See our full Dropbox guide.

6. Azure Blob Storage (Microsoft Azure)

Azure offers HIPAA-eligible Blob Storage under the Microsoft Online Services BAA. Functionally parallel to AWS S3 for object storage, with deep integration into the Azure stack.

Best for: Practices running on Microsoft infrastructure who want object storage alongside Azure compute, databases, and identity (Entra ID).

Configuration trap: Customer-managed keys (CMK) and immutable storage policies are configurable but not default. Logging via Azure Monitor needs to be enabled per storage account.

7. Google Cloud Storage

Google Cloud Platform signs BAAs covering Cloud Storage on appropriate enterprise contracts. Distinct from Google Drive (which is Workspace-based).

Best for: Practices building custom applications or analytics workloads on GCP, with object storage alongside BigQuery, Pub/Sub, and other data services.

Configuration trap: Public-access prevention is opt-in. Object versioning, retention locks, and audit logs must be enabled per bucket.

8. Wasabi (Hot Cloud Storage)

Wasabi offers HIPAA-eligible storage with a BAA on enterprise accounts. Positioned as cost-effective object storage with predictable pricing.

Best for: Backup and archival workloads where storage volume matters more than integrated app services. Common pairing: Wasabi for backups plus AWS/Azure for primary storage.

Configuration trap: Wasabi's S3-compatible API makes it easy to integrate, but encryption-at-rest configuration, immutability, and IAM policies still need to be set per bucket.

9. Sookasa (HIPAA-Specific Encryption Layer)

Sookasa specifically targets HIPAA workloads, layering encryption and access controls on top of consumer cloud storage (Dropbox, Google Drive) to make those underlying platforms HIPAA-eligible.

Best for: Practices already using consumer Dropbox or Google Drive for non-PHI and looking to extend a HIPAA-compliant layer on top without changing the user experience entirely.

Configuration trap: Sookasa's protection ends at the file boundary, leaving PHI in shared links, metadata, or comments outside the encrypted vault uncovered by the layer.

10. pCloud Business

pCloud Business signs BAAs on appropriate plans. Less widely deployed in healthcare than Google or Microsoft, but offers strong client-side encryption (pCloud Crypto) as a paid add-on.

Best for: Practices that want a simpler alternative to the enterprise giants, particularly those prioritizing zero-knowledge encryption.

Configuration trap: Standard pCloud Business excludes zero-knowledge encryption from the baseline plan; the pCloud Crypto add-on is required to put it in place, and the BAA scope needs to be verified against the add-on before contracting.

How to choose between them

The HIPAA-eligibility question is the floor. Above the floor, three dimensions matter:

• Stack integration. Practices already on Microsoft 365 should default to OneDrive. Practices on Google Workspace should default to Drive. Adding a separate provider increases BAA surface and configuration burden.
• Access control granularity. Box was engineered for fine-grained content governance, while Dropbox was engineered for sync-and-share simplicity, and the practice's PHI risk profile determines which category fits.
• Audit log retention. All providers offer audit logging at some tier; the differences are in retention duration and export format. HIPAA's six-year documentation rule should drive the requirement.

Where Patient Protect fits

The providers in this list are storage substrate; the practice still owns the configuration on top. Patient Protect sits one layer above the substrate and runs three signals continuously: BAA status with expiration tracking per vendor, configuration drift on the tenant (anonymous sharing toggles, consumer client sign-ins, conditional-access policies), and endpoint-side detection of personal sync clients on the same machines holding PHI access. The Skokie pediatric dental practice that prompted me to start tracking this category would have caught the personal-Dropbox sync inside the first week with that detection running. The vast majority of practices I onboard arrive without it, and the gap stays invisible until a complaint or a subpoena forces the question.

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Patient Protect tracks every cloud provider in your stack — BAAs, configuration drift, access logs, and workforce training — starting at $39/month. Free ePHI Data Flow Mapper inventories where your patient data actually lives, no account required.