Best OT Security Platforms for Web in 2026

The ranking

1. 1
   D

   Dragos

   OT and xOT specialist with its own threat intelligence, Managed OT Watch and incident response. The platform page gives no deployment model, so ask about sensors and hosting before comparing it with rivals.

   Best for Operators wanting managed OT detection and response

   Web·Contact for pricing

   93.0of 100

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2. 2
   

   Nozomi Networks

   OT and IoT visibility with Guardian sensors, a Vantage console on-prem or in the cloud, and Mandiant-powered threat intelligence. Its feature set is split across many product names, which makes scoping harder.

   Best for Plants needing OT and IoT asset visibility

   WebSelf-hosted·Contact for pricing

   92.0of 100

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3. 3
   

   Claroty

   Passive monitoring, asset inventory and exposure management for industrial, healthcare and commercial sites, on-premise or in the cloud. Its platform page does not list IEC 62443 or NERC CIP, so confirm standards during evaluation.

   Best for Industrial and healthcare sites needing passive discovery

   WebSelf-hosted·Contact for pricing

   91.0of 100

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4. 4
   

   Tenable One OT Exposure

   Passive OT discovery and compliance mapping to IEC 62443, NERC CIP and NIST, with cloud, on-prem or hybrid deployment. It is part of a wider exposure platform, so it suits teams already using Tenable tools.

   Best for Teams unifying OT and IT exposure management

   WebSelf-hosted·Contact for pricing

   86.0of 100

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5. 5
   

   Armis

   Passive OT and IoT monitoring offered as SaaS or on-prem, with framework mapping to IEC 62443, NIST CSF and ISO 27001. Its scope also covers IT and medical assets, so OT-only buyers should check the OT module.

   Best for Passive OT and IoT monitoring with SaaS or on-prem choice

   Web·Contact for pricing

   84.0of 100

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6. 6
   

   Fortinet OT Security Platform

   Strong for segmenting OT networks with firewalls and switch-port controls, and it suits teams already on Fortinet gear. Its OT page leads with network controls, not asset inventory, and IEC 62443-4-1 covers development only.

   Best for Fortinet-based networks that need OT segmentation

   Web·Contact for pricing

   83.5of 100

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7. 7
   

   Microsoft Defender for IoT

   Azure-based OT and IoT monitoring with cloud, on-premises and hybrid options and a path into security operations centers. It is subscription-billed and suits teams that already run Microsoft cloud services.

   Best for OT monitoring for teams on Microsoft Azure

   WebSelf-hosted·Subscription

   81.5of 100

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8. 8
   

   Radiflow

   Specialist OT threat detection and risk management for ICS and SCADA, designed for in-house SOCs and MSSPs. Its product set is narrower than the platform vendors above, and its homepage shows no prices.

   Best for In-house SOCs and MSSPs covering ICS networks

   WebSelf-hosted·Contact for pricing

   80.0of 100

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9. 9
   O

   ORDR

   Device visibility across IT, IoT, OT and medical assets, with segmentation gap checks and automated response. Its scope is wider than OT alone, and the homepage lists no prices.

   Best for Device visibility across mixed IT, IoT and OT estates

   Web·Contact for pricing

   77.0of 100

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