censys-enumeration vs crt.sh: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
censys-enumeration is a free external attack surface management tool. crt.sh 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, integrations, company size fit, here is our conclusion:
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.
Security teams doing threat intelligence or domain monitoring should use crt.sh as a free, fast way to spot certificate issuance anomalies that signal domain takeover or phishing campaigns before they scale. Certificate Transparency logs index roughly 15 billion certificates, giving you real-time visibility into what's been legitimately issued against your domains and competitors' infrastructure. Skip this if you need automated alerting or integration into your SIEM; crt.sh is a lookup tool, not a monitoring platform, and catching malicious certificates requires manual checks or custom scripting.
