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Assetnote ASM is a commercial external attack surface management tool by Assetnote. censys-enumeration 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.
Based 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 sprawling external infrastructure will get the most from Assetnote ASM because its hourly asset discovery actually catches exposures before your business units spin up new services, not weeks after. The platform covers ID.AM and DE.CM across NIST CSF 2.0, meaning you're building a real asset inventory while monitoring it continuously, and the exploit-based verification eliminates the noise that buries actionable findings in traditional scanners. Skip this if your organization lacks the headcount to operationalize a workflow-driven program; Assetnote's strength is enabling lean teams to prioritize, not giving you a dashboard to ignore.
Security teams running lean reconnaissance workflows will extract subdomains faster with censys-enumeration than querying certificate databases manually, since it automates SSL/TLS enumeration across Censys' dataset at zero cost. The 152 GitHub stars signal active use among practitioners who value simplicity over UI polish. Skip this if you need continuous monitoring or automated alerting on new discoveries; this is a one-time enumeration script, not a managed platform that rescans your attack surface on a schedule.
External attack surface management platform with continuous asset discovery
A script to extract subdomains/emails for a given domain using SSL/TLS certificate dataset on Censys.
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Common questions about comparing Assetnote ASM vs censys-enumeration for your external attack surface management needs.
Assetnote ASM: External attack surface management platform with continuous asset discovery. built by Assetnote. headquartered in Australia. Core capabilities include Hourly automated asset discovery and scanning, Asset enrichment and contextualization, Exploit-based vulnerability verification..
censys-enumeration: A script to extract subdomains/emails for a given domain using SSL/TLS certificate dataset on Censys..
Both serve the External Attack Surface Management market but differ in approach, feature depth, and target audience.
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