Guardz External Footprint vs SurfaceDiff: Side-by-Side Comparison (2026)

Guardz External Footprint: External attack surface monitoring with dark web intelligence and scanning. built by Guardz. Core capabilities include External service scanning for open ports and public exposures, DNS email record monitoring for SPF, DKIM, and DMARC, TLS/SSL certificate monitoring..

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.

Guardz External Footprint differentiates with External service scanning for open ports and public exposures, DNS email record monitoring for SPF, DKIM, and DMARC, TLS/SSL certificate monitoring. SurfaceDiff differentiates with Domain baseline scan for publicly exposed assets, Subdomain discovery, DNS record enumeration.

Guardz External Footprint is developed by Guardz. 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.

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