Nautilus OT vs s7scan: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros and cons, compared head to head.
Nautilus OT is a commercial ot asset discovery tool by Nautilus. s7scan is a free ot asset discovery tool. Compare features, ratings, integrations, and community reviews side by side to find the best ot asset discovery fit for your security stack. Independent and vendor-neutral: our scores and rankings are earned, never bought — sponsored placement is always labeled.
CST VerdictBased on our analysis of core features, here is our conclusion:
Manufacturing and critical infrastructure security teams operating Siemens environments need s7scan because it's the only free tool that enumerates PLCs at scale without requiring credentials or vendor partnerships. The 150 GitHub stars reflect active adoption by OT practitioners who've validated it against real Siemens deployments. Skip this if you're looking for a commercial support contract or cross-vendor asset discovery; s7scan is laser-focused on Siemens reconnaissance and won't help you map your Rockwell or Schneider infrastructure.
Data verified Sep 2026
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