ctlogs.dev vs OWASP Amass: Side-by-Side Comparison (2026)

ctlogs.dev: Fast Certificate Transparency search and JSON API for subdomain reconnaissance. built by Apps34. Core capabilities include Real-time Certificate Transparency Search, Automated Subdomain Enumeration, High-Performance REST JSON API..

OWASP Amass: Performs network mapping of attack surfaces and external asset discovery using open source information gathering and active reconnaissance techniques..

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

ctlogs.dev is developed by Apps34. OWASP Amass is open-source with 14,260 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

ctlogs.dev and OWASP Amass serve similar External Attack Surface Management use cases: both are External Attack Surface Management tools, both cover Osint. Key differences: ctlogs.dev is Commercial while OWASP Amass is Free, OWASP Amass is open-source. Review the feature comparison above to determine which fits your requirements.