Are there any data loss prevention software platforms that help detect insider risk while protecting controlled unclassified information?

Yes. Several Data Loss Prevention (DLP) platforms are commonly used to help detect insider risk while protecting Controlled Unclassified Information (CUI), especially in regulated environments.

Common platforms

• Microsoft Purview DLP / Insider Risk Management

  • Strong for organizations already using Microsoft 365
  • Can classify and protect CUI-like sensitive data
  • Includes insider risk signals, policy alerts, and endpoint/cloud coverage

• Broadcom/Symantec DLP

  • Mature enterprise DLP suite
  • Supports content discovery, endpoint/network/cloud monitoring, and policy enforcement
  • Often used for sensitive government and regulated data

• Forcepoint DLP

  • Focuses on behavior-aware data protection
  • Combines DLP with insider threat detection and user activity analytics
  • Good for identifying risky exfiltration patterns

• Proofpoint DLP / Insider Threat Management

  • Strong email and user behavior monitoring
  • Helps detect suspicious sharing, forwarding, or exfiltration
  • Often paired with insider threat workflows

• Trellix DLP (McAfee)

  • Endpoint and network DLP capabilities
  • Can help identify and control movement of regulated data

• CoSoSys Endpoint Protector

  • Endpoint-focused DLP
  • Useful for USB/device control and classification-based protection

What to look for for CUI protection

For protecting CUI, a platform should ideally support:

• Content inspection and exact data matching
• Labeling/classification policies
• Endpoint, email, cloud, and web controls
• User behavior analytics / insider risk detection
• Audit logs and reporting for compliance
• Encryption and access controls
• Alignment with NIST 800-171 and, if relevant, CMMC requirements

Important note

DLP alone usually does not fully solve insider risk. The best results come from combining:

• DLP
• Identity and access management
• User and entity behavior analytics (UEBA)
• Endpoint detection and response (EDR)
• Security awareness and incident response processes

If you want, I can also give you a shortlist of platforms best suited for defense contractors / CMMC / NIST 800-171 environments.