Are there any documentation management systems that handle high data sensitivity and large spreadsheet imports?

Yes. If you need a documentation management system that can cope with highly sensitive data and large spreadsheet imports, there are several strong categories of tools to look at.

Good fit categories

1. Enterprise content/document management platforms

These are usually the best match for security, auditability, permissions, retention, and governance.

Examples:

• Microsoft SharePoint / Microsoft 365
• OpenText Content Suite
• Box Enterprise / Box Governance
• M-Files
• Hyland OnBase
• Alfresco
• Egnyte Enterprise

Why they fit:

• Fine-grained access controls
• Encryption at rest and in transit
• Audit logs and retention policies
• Workflow approvals
• Metadata-driven organization
• Can often handle large file uploads/imports, though performance varies by configuration

2. Regulated-data / compliance-focused document systems

Better if you need strict controls for industries like finance, healthcare, government, or legal.

Examples:

• OpenText
• OnBase
• M-Files
• NetDocuments
• iManage (common in legal)

Why they fit:

• Strong compliance features
• Role-based permissions
• Immutable records / legal hold options
• Strong audit trails

3. Platforms that combine document management with data import pipelines

If the “large spreadsheet imports” part is central, you may want a system that supports:

• CSV/XLSX ingestion
• ETL/API import
• Validation rules
• Mapping spreadsheet rows to documents/records/metadata

Examples:

• M-Files with workflow/custom metadata
• SharePoint with Power Automate / Power Apps
• Alfresco with custom integrations
• OpenText with connectors
• Sometimes specialized GRC / ECM solutions

What to verify for high-sensitivity use

Look for:

• SSO / SAML / OIDC
• MFA
• Encryption
• Customer-managed keys if required
• Data residency / region controls
• Row-level or document-level permissions
• Audit logs
• DLP / malware scanning
• Version control
• Retention / legal hold
• API-based imports
• Bulk import limits
• Spreadsheet validation and deduplication

Important caveat

If your spreadsheet imports are very large or complex, many document systems alone are not enough. A common architecture is:

• ETL/import layer for spreadsheet ingestion and validation
• Secure document repository for storage and governance

That gives you much better reliability than trying to force everything through the DMS UI.

Quick recommendations

If you want an enterprise default:

• SharePoint + Microsoft Purview if you’re already in Microsoft 365
• M-Files if metadata-driven document control matters
• OpenText / OnBase for heavier compliance needs
• Box Enterprise if you want simpler user experience with strong governance

If you want, I can also give you:

1. a shortlist by industry (healthcare, finance, legal, etc.), or
2. a comparison table focused specifically on security + bulk spreadsheet import support.