assetfinder vs Assetnote ASM: 2026 Comparison
assetfinder is a free external attack surface management tool. Assetnote ASM is a commercial external attack surface management tool by Assetnote. 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:
Reconnaissance teams and pentesters who need fast domain enumeration during scoping phases should use assetfinder; it discovers subdomains through multiple passive sources without needing API keys or authentication, which beats tools that require paid integrations just to start mapping. The 3,393 GitHub stars and active maintenance reflect real adoption in the offensive security community where speed and simplicity matter more than UI polish. Skip this if your team expects a graphical interface or wants asset discovery bundled with vulnerability scanning and reporting; assetfinder is deliberately command-line only, built for operators who already know what they're hunting.
