Alternatives
Best Microsoft Defender for IoT alternatives in 2026
Microsoft Defender for IoT is Azure-based threat detection for OT and IoT networks. These 9 alternatives come from the same rankings, ordered by editorial score. Connected products carry a small, disclosed lift.
Ranked alternatives
- 1
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
WebContact for pricing
- 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-hostedContact for pricing
- 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-hostedContact for pricing
- 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-hostedContact for pricing
- 5
TXOne Networks
Also runs on Windows, Linux. OT security with endpoint, network and inspection products, and Windows endpoint coverage back to Windows 2000. Pricing is quote-based, and the product set is sold as one architecture rather than one appliance.
Best for Plants with legacy Windows endpoints and OT networks
WindowsLinuxSelf-hostedContact for pricing
- 6
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
WebContact for pricing
- 7
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
WebContact for pricing
- 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-hostedContact for pricing
- 9
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
WebContact for pricing
About Microsoft Defender for IoT alternatives
- What is the best alternative to Microsoft Defender for IoT?
- On listme.name the highest-scored alternative is Dragos, followed by Nozomi Networks. The right choice depends on price, platform and whether you need open source.
- Is there a free alternative to Microsoft Defender for IoT?
- No free alternative is ranked next to Microsoft Defender for IoT at the moment.
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