ImmuniWeb® On-Demand vs nfspy: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros and cons, compared head to head.
ImmuniWeb® On-Demand is a commercial penetration testing tool by ImmuniWeb. nfspy is a free penetration testing tool. Compare features, ratings, integrations, and community reviews side by side to find the best penetration testing fit for your security stack. Independent and vendor-neutral: we never sell rankings.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, company size fit, deployment model, here is our conclusion:
Security teams running development cycles faster than their DAST tooling can keep up will find ImmuniWeb® On-Demand cuts through the noise; it combines threat-led manual testing with AI automation to eliminate false positives while maintaining a rapid delivery SLA, meaning your developers actually trust the findings. The zero false-positives guarantee is backed by compliance reporting that maps cleanly to ID.RA and PR.PS functions under NIST CSF 2.0, giving you audit credibility without the usual noise. Skip this if your main need is internal application discovery or continuous monitoring across hundreds of microservices; On-Demand is built for pentesting depth on a defined scope, not breadth.
Red teamers and penetration testers who need to simulate NFS credential theft will find nfspy invaluable for exposing how easily clients can be spoofed on misconfigured networks; it's the only free tool that does this specific attack without requiring kernel modules or custom compilation. The 299 GitHub stars and zero dependencies make it trivial to deploy in lab environments or during engagements where you need to validate NFS ACL weaknesses quickly. Skip this if your focus is post-exploitation persistence or lateral movement beyond the NFS protocol itself; nfspy is a narrow, sharp instrument for one attack surface, not a general-purpose network compromise tool.
