ImmuniWeb® Discovery vs WitnessMe: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
ImmuniWeb® Discovery is a commercial external attack surface management tool by ImmuniWeb. WitnessMe 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 sprawling attack surfaces across cloud, SaaS, and third-party integrations should prioritize ImmuniWeb® Discovery for its dark web monitoring and supplier risk visibility, capabilities most competitors either skip or bolt on as afterthoughts. The platform covers five NIST CSF 2.0 functions including asset discovery, continuous monitoring, and supply chain risk, which means it actually closes gaps in how you map external exposure rather than just flagging what you already know exists. Skip this if your organization needs deep cloud-native workload scanning or has zero tolerance for monitoring capabilities that lean detection over remediation; ImmuniWeb® Discovery is built for visibility-first teams, not for shops that demand integrated response automation.
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.
