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s7scan is a free operational technology asset discovery tool. Armis Threat Detection and Analysis is a commercial operational technology asset discovery tool by Armis. Compare features, ratings, integrations, and community reviews side by side to find the best operational technology asset discovery fit for your security stack.
Based on our analysis of NIST CSF 2.0 coverage, core features, company size fit, deployment model, 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.
Armis Threat Detection and Analysis
Manufacturing and utilities teams flying blind on OT/IoT asset inventory should start with Armis Threat Detection and Analysis because passive discovery actually works without disrupting operational networks, a hard requirement that active-only scanners violate. The platform maps assets to CVEs and control gaps across NIST ID.AM and ID.RA simultaneously, giving you a risk-ranked inventory instead of a spreadsheet; deployment is cloud-native, so you're not managing another appliance. Skip this if your OT environment is heavily air-gapped or you need deep forensics and response automation; Armis excels at visibility and threat detection, not incident playbooks.
A tool for scanning networks, enumerating Siemens PLCs, and gathering detailed information about them.
OT/IoT asset discovery and threat detection platform for industrial environments
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Common questions about comparing s7scan vs Armis Threat Detection and Analysis for your operational technology asset discovery needs.
s7scan: A tool for scanning networks, enumerating Siemens PLCs, and gathering detailed information about them..
Armis Threat Detection and Analysis: OT/IoT asset discovery and threat detection platform for industrial environments. built by Armis. headquartered in United States. Core capabilities include Passive and active asset discovery for OT/IoT devices, Enriched asset inventory with CMDB aggregation and deduplication, Security control gap analysis for EDR and vulnerability scanners..
Both serve the Operational Technology Asset Discovery market but differ in approach, feature depth, and target audience.
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