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Head-to-head · IoT Security Software

Microsoft Defender for IoT vs Tenable One OT Exposure

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score Microsoft Defender for IoT #1 in IoT Security Software 9.3/10 Pricing on request ✓ 4 of 5 features Visit Microsoft
Tenable One OT Exposure #2 in IoT Security Software 9.2/10 Pricing on request ✓ 1 of 5 features Visit Tenable

Microsoft Defender for IoT leads on 0 checks, Tenable One OT Exposure on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMicrosoft Defender for IoT · 9.3/10
  • Most featuresMicrosoft Defender for IoT · 4 of 5

Microsoft Defender for IoT scores higher on our rubric for iot security software: 9.3 against 9.2 out of 10; our editors rank them #1 and #2.

Microsoft Defender for IoT is the better fit for organizations standardizing OT security on Microsoft. Tenable One OT Exposure is the better fit for teams prioritizing OT exposure and vulnerability risk.

  • Microsoft Defender for IoT fits best

    Organizations standardizing OT security on Microsoft

  • Tenable One OT Exposure fits best

    Teams prioritizing OT exposure and vulnerability risk

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Side by side

Feature Microsoft Defender for IoT 9.3/10 Visit ↗ Tenable One OT Exposure 9.2/10 Visit ↗
At a glance
Editor score 9.3 9.2
Ranking #1 in IoT Security Software #2 in IoT Security Software
Best for Organizations standardizing OT security on Microsoft Teams prioritizing OT exposure and vulnerability risk
Pricing model Paid Paid
Starting price Pricing on request —
Free plan — Not checked yet
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web, Windows Web
Support Docs Docs
Integrations 3 integrations 6 integrations
Built for Mid-market, Enterprise Mid-market, Enterprise
Features Microsoft Defender for IoT 4/5 · Tenable One OT Exposure 1/5
IoT asset discovery ✓ ✓
Industrial OT coverage ✓ (best) Not checked yet
Threat detection ✓ (best) Not checked yet
Device segmentation Not checked yet Not checked yet
Incident response ✓ (best) Not checked yet
Specs
Deployment options Hybrid Not checked yet
Our review
Pros
  • Discovers IoT and OT assets with protocol and communications context.
  • Combines passive and active agentless monitoring with OT-aware threat detection.
  • Offers virtual-machine or physical sensors, with cloud or local management.
  • Combines passive packet inspection with Safe Active Querying
  • Discovers and classifies OT, ICS, IoT, and IT assets
  • Tracks VPR-based vulnerability risk and configuration changes
Cons
  • Pricing requires contacting sales, and licensing varies by tier and site or device count.
  • There is no permanent free plan; the Enterprise IoT offer is a free trial.
  • Listed support channels are limited to documentation.
  • Standalone subscription pricing requires a sales representative
  • Licensing is based on detected IP addresses
  • Support channels listed are documentation
Our verdict

Microsoft Defender for IoT monitors enterprise IoT and industrial environments, including ICS and OT networks. It is intended for security leaders, OT security administrators, industrial engineers, risk managers, and SOC analysts who need…

Read the review →

Tenable One OT Exposure monitors industrial control environments for threats, vulnerabilities, configuration changes, and anomalous activity. It is aimed at security teams and OT engineers who need visibility across converged IT and OT…

Read the review →
  1. Microsoft Defender for IoTIoT Security Software 9.3Pricing on request
  2. Tenable One OT ExposureIoT Security Software 9.2Pricing on request

Strengths and trade-offs

  • Microsoft Defender for IoT — where it wins

    • Discovers IoT and OT assets with protocol and communications context.
    • Combines passive and active agentless monitoring with OT-aware threat detection.
    • Offers virtual-machine or physical sensors, with cloud or local management.

    Where it doesn't

    • Pricing requires contacting sales, and licensing varies by tier and site or device count.
    • There is no permanent free plan; the Enterprise IoT offer is a free trial.
    • Listed support channels are limited to documentation.

  • Tenable One OT Exposure — where it wins

    • Combines passive packet inspection with Safe Active Querying
    • Discovers and classifies OT, ICS, IoT, and IT assets
    • Tracks VPR-based vulnerability risk and configuration changes

    Where it doesn't

    • Standalone subscription pricing requires a sales representative
    • Licensing is based on detected IP addresses
    • Support channels listed are documentation
  • Microsoft Defender for IoT9.3/10 · Pricing on request

    Agentless OT monitoring and threat response for organizations using Microsoft security tools.

    Visit MicrosoftFull verdict →
  • Tenable One OT Exposure9.2/10 · Pricing on request

    OT asset discovery, threat detection, and vulnerability management with flexible deployment options.

    Visit TenableFull verdict →

More comparisons

All IoT security software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update