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Aleph Search Clear is a commercial external attack surface management tool by Aleph Networks. altdns is a free external attack surface management tool. Compare features, ratings, integrations, and community reviews side by side to find the best external attack surface management fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, company size fit, deployment model, here is our conclusion:
Mid-market and enterprise security teams managing third-party and supply chain risk need Aleph Search Clear because it finds exposure across both surface and deep web in a single query, then automates the monitoring that actually catches when your vendors get compromised. The tool covers five NIST CSF 2.0 functions from asset discovery through adverse event analysis, and its KYC/KYS alignment with DORA and NIS 2 saves compliance teams weeks of manual mapping work. Skip this if your organization only needs traditional OSINT for incident response; Aleph is built for continuous ecosystem risk oversight, not one-off research.
Security teams hunting for overlooked subdomains in external attack surface reconnaissance will find altdns invaluable because it generates permutations that standard enumeration tools miss, catching typosquatting and subdomain variations that land in your blind spots. The 2,439 GitHub stars reflect adoption by practitioners who've validated the mutation logic against real-world domain configurations. Skip this if you need a managed UI or integration with your existing EASM platform; altdns is a CLI-first tool that demands operator familiarity and manual orchestration into your scanning workflow.
OSINT tool for mapping & monitoring risk ecosystems on Clear & Deep Web.
A tool for generating permutations, alterations and mutations of subdomains and resolving them
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Common questions about comparing Aleph Search Clear vs altdns for your external attack surface management needs.
Aleph Search Clear: OSINT tool for mapping & monitoring risk ecosystems on Clear & Deep Web. built by Aleph Networks. headquartered in France. Core capabilities include Clear Web and Deep Web search and analysis, AI-powered source discovery and infosphere enrichment, Cyber exposure surface mapping and monitoring (EASM)..
altdns: A tool for generating permutations, alterations and mutations of subdomains and resolving them..
Both serve the External Attack Surface Management market but differ in approach, feature depth, and target audience.
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