ctlogs.dev vs ImmuniWeb® Discovery: 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..

ImmuniWeb® Discovery: ImmuniWeb Discovery is an attack surface management platform that continuously monitors an organization's external digital assets for security vulnerabilities, misconfigurations, and threats across domains, applications, cloud resources, and the dark web. built by ImmuniWeb..

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

ctlogs.dev is developed by Apps34. ImmuniWeb® Discovery is developed by ImmuniWeb. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

ctlogs.dev and ImmuniWeb® Discovery serve similar External Attack Surface Management use cases: both are External Attack Surface Management tools. Review the feature comparison above to determine which fits your requirements.