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Head-to-head · OT and ICS Security Monitoring Software

Nozomi Networks Platform vs OTDefend

  • Updated Nov 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Nozomi Networks Platform #3 in OT and ICS Security Monitoring Software 9.2/10 Pricing on request ✓ 3 of 3 features Visit site
OTDefend #7 in OT and ICS Security Monitoring Software 8.4/10 Pricing on request ✓ 3 of 3 features Contact OTDefend

Nozomi Networks Platform leads on 0 checks, OTDefend on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreNozomi Networks Platform · 9.2/10

Nozomi Networks Platform scores higher on our rubric for ot and ics security monitoring software: 9.2 against 8.4 out of 10; our editors rank them #3 and #7.

Nozomi Networks Platform is the better fit for large mixed OT, IoT, and enterprise environments. OTDefend is the better fit for air-gapped OT environments.

  • Nozomi Networks Platform fits best

    Large mixed OT, IoT, and enterprise environments

  • OTDefend fits best

    Air-gapped OT environments

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Side by side

Feature Nozomi Networks Platform 9.2/10 Visit ↗ OTDefend 8.4/10 Visit ↗
At a glance
Editor score 9.2 8.4
Ranking #3 in OT and ICS Security Monitoring Software #7 in OT and ICS Security Monitoring Software
Best for Large mixed OT, IoT, and enterprise environments Air-gapped OT environments
Pricing model Paid Paid
Starting price Pricing on request Pricing on request
Free plan Not checked yet Not checked yet
Free trial — —
Deployment Cloud, Self-hosted Self-hosted
Platforms Web, Linux Windows
Support Phone, Tickets, Community, Docs · 24/7 Email · 24/7
Integrations 12 integrations 20 integrations
Built for Mid-market, Enterprise Mid-market, Enterprise
Features Nozomi Networks Platform 3/3 · OTDefend 3/3
Passive monitoring ✓ ✓
OT asset discovery ✓ ✓
SIEM integration ✓ ✓
Specs
Deployment Not checked yet On_premises
Supported protocols Modbus, IEC 61850-8-1 (MMS), EtherNet/IP, PROFINET, BACnet Modbus (TCP and RTU), S7comm, DNP3, EtherNet/IP, IEC-104, IEC 61850, PROFINET, EtherCAT, POWERLINK, CC-Link IE, OPC UA, BACnet, FINS, MELSEC, HART-IP
Asset limit Not checked yet Not checked yet
Our review
Pros
  • Passive monitoring with automatic asset discovery and network visualization
  • Vulnerability assessment, behavioral baselining, and anomaly detection
  • Broad SIEM, cloud, NAC, ticketing, and security-tool integrations
  • Supports passive deep-packet inspection and automatic OT asset profiling
  • Maps industrial networks to topology and Purdue zones
  • Connects with SIEM, EDR, firewall, ticketing and threat-intelligence tools
Cons
  • Pricing requires contacting sales
  • The platform spans multiple components and deployment options
  • Its broad scope may exceed narrower monitoring requirements
  • Pricing requires contacting sales or requesting a demo
  • Windows is the listed platform
  • Some hosts may require a Windows endpoint agent beyond network monitoring
Our verdict

Nozomi Networks Platform provides visibility and security monitoring for operational technology, industrial control systems, IoT, and critical infrastructure environments. It is suited to large mixed environments that need passive network…

Read the review →

OTDefend is an on-premises cybersecurity platform for operational technology and industrial control system environments. It is designed for industrial facilities and critical infrastructure operators across energy, manufacturing, water,…

Read the review →
  1. Nozomi Networks PlatformOT and ICS Security Monitoring Software 9.2Pricing on request
  2. OTDefendOT and ICS Security Monitoring Software 8.4Pricing on request

Strengths and trade-offs

  • Nozomi Networks Platform — where it wins

    • Passive monitoring with automatic asset discovery and network visualization
    • Vulnerability assessment, behavioral baselining, and anomaly detection
    • Broad SIEM, cloud, NAC, ticketing, and security-tool integrations

    Where it doesn't

    • Pricing requires contacting sales
    • The platform spans multiple components and deployment options
    • Its broad scope may exceed narrower monitoring requirements

  • OTDefend — where it wins

    • Supports passive deep-packet inspection and automatic OT asset profiling
    • Maps industrial networks to topology and Purdue zones
    • Connects with SIEM, EDR, firewall, ticketing and threat-intelligence tools

    Where it doesn't

    • Pricing requires contacting sales or requesting a demo
    • Windows is the listed platform
    • Some hosts may require a Windows endpoint agent beyond network monitoring
  • Nozomi Networks Platform9.2/10 · Pricing on request

    Broad monitoring, discovery, anomaly detection, and integrations for mixed OT and IoT estates.

    Visit siteFull verdict →
  • OTDefend8.4/10 · Pricing on request

    A broad on-premises OT security platform for air-gapped industrial environments.

    Contact OTDefendFull verdict →

More comparisons

All OT and ICS security monitoring software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026

Last updated · How we research and update