# Microsoft Defender for IoT vs Tenable OT Security: which do AI models recommend for ot/iot security, October 2026

IT AI Recommendation Index, October 2026 Edition, OT and IoT security. One of fourteen models named Microsoft Defender for IoT first on the direct prompt; zero named Tenable OT Security. Page: https://it-ai-index.com/security/ot-and-iot-security/microsoft-defender-for-iot-vs-tenable-ot-security/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Microsoft Defender for IoT | 21% | #1 of 9 | 21% | 42 | 13 of 14 |
| Tenable OT Security | 4% | #6 of 9 | 15% | 27 | 11 of 14 |

## The direct prompt, model by model

- Gemini 3.5 Flash: microsoft defender for iot first (first choices: Fortinet OT Security Platform, Microsoft Defender for IoT) (alternatives: Claroty xDome, Nozomi Networks Guardian)
- Claude Haiku 4.5: neither first, one named (first choices: Claroty xDome, Nozomi Networks Guardian) (alternatives: Dragos Platform, Fortinet OT Security Platform, Palo Alto Networks, Tenable OT Security)
- DeepSeek V4 Flash: neither first, one named (first choices: Claroty xDome) (alternatives: Microsoft Defender for IoT, Nozomi Networks Guardian, Palo Alto Networks Industrial OT Security)
- Kimi K2: neither first, one named (first choices: Armis Centrix, Claroty xDome) (alternatives: Fortinet OT Security Platform, Microsoft Defender for IoT, Nozomi Networks Guardian)
- MiniMax M2.5: neither first, one named (first choices: Radiflow360) (alternatives: Armis Centrix, Claroty xDome, Nozomi Networks Guardian, Tenable OT Security)
- GPT-5.4 mini: neither named (first choices: Claroty xDome) (alternatives: Armis Centrix, Dragos Platform)
- Perplexity Sonar: neither named (first choices: Radiflow360) (alternatives: Claroty xDome, Dragos Platform, Fortinet OT Security Platform, Palo Alto Networks)
- Grok 4.1 Fast: neither named (first choices: Claroty xDome) (alternatives: Dragos Platform, Fortinet OT Security Platform, Nozomi Networks Guardian, Palo Alto Networks)
- Mistral Small: neither named (first choices: Dragos Platform) (alternatives: Claroty xDome, Nozomi Networks Guardian)
- Llama 4 Maverick: neither named (first choices: Palo Alto Networks) (alternatives: Claroty xDome, Forcepoint)
- Qwen 3.7 Flash: neither named (first choices: Industrial AI) (alternatives: Claroty xDome, Nozomi Networks Guardian, Tenable.io OT)
- GLM 4.7 FlashX: neither named (first choices: Fortinet OT Security Platform) (alternatives: Dragos Platform, Nozomi Networks Guardian)
- GPT-6 Luna: neither named (first choices: Nozomi Networks Vantage) (alternatives: Claroty xDome, Dragos Platform)
- Muse Glimmer 30B: neither named (first choices: Radiflow360) (alternatives: Claroty xDome, Nozomi Networks Guardian)

## What the models said about Microsoft Defender for IoT

- "Avoid if budget is tight: Nozomi Networks and Microsoft Defender for IoT" (Perplexity Sonar, budget prompt, hard negative)
- "I'd avoid starting a new deployment that depends on this console... That's a caution about the legacy console, not a blanket warning against Microsoft Defender for IoT." (GPT-6 Luna, negative prompt, soft negative)
- "These are IT-security vendors extending into OT. Their effectiveness depends on how well their OT findings integrate with your existing SOC" (Mistral Small, negative prompt, soft negative)
- "For most mid-market B2B companies, Microsoft Defender for IoT (if you are a Microsoft shop) or Fortinet (if you use their network hardware) are the most successful starting points" (Gemini 3.5 Flash, direct prompt, first choice)
- "For a small company with one OT site and up to 100 devices, I'd start by evaluating Microsoft Defender for IoT's XS site license." (GPT-6 Luna, budget prompt, first choice)
- "I'd suggest starting with Microsoft Defender for IoT ($70-250/month) as the most cost-effective commercial solution" (Kimi K2, budget prompt, first choice)

## What the models said about Tenable OT Security

- "These are IT-security vendors extending into OT. Their effectiveness depends on how well their OT findings integrate with your existing SOC" (Mistral Small, negative prompt, soft negative)
- "these vendors risk falling behind peers regarding advanced AI-driven detection capabilities" (Qwen 3.7 Flash, negative prompt, soft negative)
- "Tenable.ot has user complaints on asset classification accuracy and sensor bugs" (Grok 4.1 Fast, negative prompt, soft negative)
- "frequently cited as a more budget-friendly option compared to some competitors... Start with a free trial or the most affordable commercial platform (like Tenable OT Security or Acreto)" (Mistral Small, budget prompt, first choice)
- "Best Overall Value: Tenable OT Security (formerly Tenable.ot)" (DeepSeek V4 Flash, budget prompt, first choice)
- "Tenable's Tenable One exposure management platform is a comprehensive attack surface management system covering endpoints, cloud environments, OT systems" (Claude Haiku 4.5, direct prompt, alternative)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.