WitnessMe vs Assetnote ASM: 2026 Comparison
WitnessMe 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:
Teams conducting external attack surface reconnaissance on a tight budget will find WitnessMe's automated screenshot capture practical for identifying forgotten web assets and exposed services without licensing costs. The free pricing and 762 GitHub stars indicate active community use for this narrow job. Skip this tool if you need continuous monitoring, risk scoring, or integration with your existing EASM platform; WitnessMe is an inventory snapshot tool, not a managed service.
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.
