# Microsoft Defender for IoT vs Fortinet OT Security Platform: 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; two named Fortinet OT Security Platform. Page: https://it-ai-index.com/security/ot-and-iot-security/microsoft-defender-for-iot-vs-fortinet-ot-security-platform/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Microsoft Defender for IoT | 21% | #1 of 9 | 21% | 42 | 13 of 14 |
| Fortinet OT Security Platform | 8% | #4 of 9 | 4% | 23 | 11 of 14 |

## The direct prompt, model by model

- Gemini 3.5 Flash: both first (first choices: Fortinet OT Security Platform, Microsoft Defender for IoT) (alternatives: Claroty xDome, Nozomi Networks Guardian)
- GLM 4.7 FlashX: fortinet ot security platform first (first choices: Fortinet OT Security Platform) (alternatives: Dragos Platform, 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)
- Perplexity Sonar: neither first, one named (first choices: Radiflow360) (alternatives: Claroty xDome, Dragos Platform, Fortinet OT Security Platform, Palo Alto Networks)
- Grok 4.1 Fast: neither first, one named (first choices: Claroty xDome) (alternatives: Dragos Platform, Fortinet OT Security Platform, Nozomi Networks Guardian, Palo Alto Networks)
- 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)
- GPT-5.4 mini: neither named (first choices: Claroty xDome) (alternatives: Armis Centrix, Dragos Platform)
- 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)
- MiniMax M2.5: neither named (first choices: Radiflow360) (alternatives: Armis Centrix, Claroty xDome, Nozomi Networks Guardian, Tenable OT Security)
- 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 Fortinet OT Security Platform

- "may be better evaluated as infrastructure/security-control platforms than as best-in-class OT-native monitors" (Perplexity Sonar, negative prompt, soft negative)
- "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)
- "Fortinet offers a cost-effective entry point with OT appliances starting at $2,200-$4,000" (Claude Haiku 4.5, budget prompt, first choice)
- "Start with Fortinet for network-based protection and segmentation" (GLM 4.7 FlashX, direct prompt, first choice)

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.