The data never left the room.

That’s the promise of Microsoft Presidio Air-Gapped—an approach to protecting sensitive information where everything stays locked inside an isolated environment, beyond the reach of external networks. In a world where breaches are routine, air-gapping is more than a strategy. It’s a last line of defense.

Microsoft Presidio Air-Gapped takes the core strengths of Presidio—its ability to discover, classify, and anonymize sensitive data—and deploys them in a fully isolated infrastructure. The pipeline runs without any outbound internet connectivity, which means no accidental leaks, no third-party telemetry, no exposure to external APIs, and no window for remote attack vectors. Every operation happens within a self-contained system, maintaining compliance with strict data privacy laws and zero-trust principles.

The engine works in concert with AI-powered detection to find and mask personally identifiable information (PII) across inputs and outputs. Entities like names, credit card numbers, and health records are identified, redacted, or replaced with synthetic placeholders—without data ever crossing the isolation boundary. For industries like finance, healthcare, or critical infrastructure, this gives security, compliance, and operational control without sacrificing automation.

Deployment is flexible. Presidio Air-Gapped can run on-premises, in secured private cloud instances, or within specialized high-security facilities. Integration with existing CI/CD pipelines is possible, allowing automated PII scanning and anonymization as part of standard engineering workflows. Because it’s air-gapped, these operations do not require trust in upstream internet agents or public SaaS environments.

Performance stays predictable even at scale. With batch processing, parallel workloads, and native entity recognizers, large datasets can be sanitized quickly. Security auditing becomes straightforward because all logs, models, and masks stay inside your own controlled perimeter.

If you want to see what best-in-class PII detection and anonymization look like—without ever sending a byte beyond your walls—try it for yourself. Spin up a live instance in minutes at hoop.dev and watch Microsoft Presidio Air-Gapped in action from inside your own secure environment.