Attack Surface Scan vs autoSubTakeover: Side-by-Side Comparison (2026)

Attack Surface Scan: Agentless external attack surface monitoring with continuous change detection. built by Attack Surface Scan. Core capabilities include Agentless external attack surface scanning with no installation required, Continuous scheduled re-scanning with change detection and diff tracking, HTTP security header analysis (HSTS, CSP, CORS, cookie flags)..

autoSubTakeover: A tool to identify potential subdomain takeovers by checking if a CNAME record resolves to the scope address..

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

Attack Surface Scan is developed by Attack Surface Scan. autoSubTakeover is open-source with 134 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Attack Surface Scan and autoSubTakeover serve similar External Attack Surface Management use cases: both are External Attack Surface Management tools, both cover DNS Security, Subdomain Enumeration. Key differences: Attack Surface Scan is Commercial while autoSubTakeover is Free, autoSubTakeover is open-source. Review the feature comparison above to determine which fits your requirements.