Assetnote ASM vs SurfaceDiff: Side-by-Side Comparison (2026)

Assetnote ASM: External attack surface management platform with continuous asset discovery. built by Assetnote. Core capabilities include Hourly automated asset discovery and scanning, Asset enrichment and contextualization, Exploit-based vulnerability verification..

SurfaceDiff: Continuous external attack surface monitoring that shows what changed between scans. built by SurfaceDiff. Core capabilities include Domain baseline scan for publicly exposed assets, Subdomain discovery, DNS record enumeration..

Both serve the External Attack Surface Management market but differ in approach, feature depth, and target audience.

Assetnote ASM differentiates with Hourly automated asset discovery and scanning, Asset enrichment and contextualization, Exploit-based vulnerability verification. SurfaceDiff differentiates with Domain baseline scan for publicly exposed assets, Subdomain discovery, DNS record enumeration.

Assetnote ASM is developed by Assetnote founded in 2018-01-01T00:00:00.000Z. SurfaceDiff is developed by SurfaceDiff. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Assetnote ASM and SurfaceDiff serve similar External Attack Surface Management use cases: both are External Attack Surface Management tools, both cover Security Scanning. Review the feature comparison above to determine which fits your requirements.