Attack Surface Scan vs Microsoft Defender EASM: side-by-side comparison (2026)

Attack Surface Scan: Agentless external attack surface monitoring with continuous change detection, built by Attack Surface Scan.

Microsoft Defender EASM: Discovers and monitors external-facing assets and vulnerabilities, built by Microsoft.

The table above shows where their features, integrations, deployment and company size fit differ.

Attack Surface Scan is made by Attack Surface Scan. Microsoft Defender EASM is made by Microsoft. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. Attack Surface Scan and Microsoft Defender EASM are both External Attack Surface Management products. Use the table above to see where features, deployment and company size fit differ.