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OT and IoT security · November 2026 Edition
Microsoft Defender for IoT vs Tenable OT Security
Five of fourteen models named Microsoft Defender for IoT first on the direct prompt; zero named Tenable OT Security. Microsoft Defender for IoT was named by thirteen of the fourteen models and Tenable OT Security by thirteen and Microsoft Defender for IoT carries 49 labels and Tenable OT Security 27, so the shares are not directly comparable.
Microsoft Defender for IoT
endorsed leaderNamed in one category this edition.
Named in one category this edition.
First-choice share38%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate8%7%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#1#6A position in a field of 11; printed, not drawn.
Labels4927A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Microsoft Defender for IoT reading right to left. Rank and label count are printed, not drawn.Claroty xDome was named alongside these two in ten of the fourteen direct answers. Microsoft Defender for IoT vs Claroty xDome · Microsoft Defender for IoT vs Nozomi Networks Guardian · Microsoft Defender for IoT vs Fortinet OT Security Platform
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; every quote names the model and the prompt it came from. Both figures come from the OT and IoT security page.
By framing
How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
Microsoft Defender for IoTFirst choices, of fourteen modelsTenable OT Security
Direct50
Paraphrase70
Comparative10
Budget-constrained711 against Tenable OT Security
Scale-constrained00
Negative004 against Microsoft Defender for IoT · 1 against Tenable OT Security
Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.
Across every category in the November 2026 Edition, Microsoft Defender for IoT and Tenable OT Security were named in the same answer fifty-five times, of the 151 answers naming Microsoft Defender for IoT and the 78 naming Tenable OT Security. In those answers Tenable OT Security took the first choice zero times and Microsoft Defender for IoT twenty.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where Microsoft Defender for IoT and Tenable OT Security stood in it.
| Model | DirectMD | ParaphraseMD | ComparativeMD | Budget-constrainedMD | Scale-constrainedMD | NegativeMD |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | MD | MD | |||
| GPT-5.4 mini | | | ||||
| Gemini 3.5 Flash | MD | MD | MD | MD | ||
| Perplexity Sonar | MD | MD | MD | MD | MD | |
| Grok 4.20 | MD | MD | MD | MD | ||
| Mistral Small | MD | MD | MD | MD | ||
| DeepSeek V4 Flash | MD | MD | MD | MD | ||
| Llama 4 Maverick | MD | MD | ||||
| Qwen 3.7 Flash | MD | MD | | | ||
| Kimi K2 | MD | MD | MD | |||
| GLM 4.7 FlashX | MD | MD | MD | |||
| MiniMax M2.5 | MD | MD | MD | |||
| GPT-6 Luna | MD | MD | MD | |||
| Muse Glimmer 30B | MD | MD | MD |
MD Microsoft Defender for IoT Tenable OT SecurityMD first choiceMD named as an alternativeMD argued againstblank: not namedEach cell is one answer, Microsoft Defender for IoT on the left and Tenable OT Security on the right.
Tenable OT SecurityMD first choiceMD named as an alternativeMD argued againstblank: not namedEach cell is one answer, Microsoft Defender for IoT on the left and Tenable OT Security on the right.The direct prompt
The plain question, one answer per model, grouped by where Microsoft Defender for IoT and Tenable OT Security stood in it.
Microsoft Defender for IoT first, Tenable OT Security an alternative
5 of 14 modelsTenable OT Security was named in the answer but not as the choice, or not at all.Perplexity SonarMicrosoft Defender for IoT alternatives: Fortinet OT Security Platform, Nozomi Networks Guardian, Tenable OT Security
Mistral SmallClaroty xDome, Microsoft Defender for IoT alternatives: Dragos Platform, Nozomi Networks Guardian, Tenable OT Security
DeepSeek V4 FlashMicrosoft Defender for IoT alternatives: Claroty xDome, Nozomi Networks Guardian
Kimi K2Microsoft Defender for IoT, Nozomi Networks Guardian alternatives: OTORIO, SecuPi
MiniMax M2.5Microsoft Defender for IoT, Nozomi Networks Vantage alternatives: Fortinet OT Security Platform, Palo Alto Networks Zero Trust OT Security
Neither was the first choice, one was named
5 of 14 modelsThe answer put something else first and named one of the two as an alternative.Claude Haiku 4.5Asimily alternatives: Claroty xDome, Forescout Vistaro Platform, Tenable OT Security
GPT-5.4 miniClaroty xDome alternatives: Fortinet OT Security Platform, Nozomi Networks Guardian, Tenable OT Security
Gemini 3.5 FlashClaroty xDome alternatives: Armis Centrix, Fortinet OT Security Platform, Microsoft Defender for IoT, Nozomi Networks Guardian
Qwen 3.7 FlashClaroty xDome alternatives: Armis Centrix, Microsoft Defender for IoT, Nozomi Networks Guardian
Muse Glimmer 30BNozomi Networks Guardian alternatives: Claroty xDome, Fortinet OT Security Platform, Microsoft Defender for IoT, Tenable OT Security
Neither was named
4 of 14 modelsThe answer made no first choice from these two in this category.Grok 4.20Claroty xDome alternatives: Dragos Platform, Nozomi Networks Guardian
Llama 4 Maverickno first choice
GLM 4.7 FlashXFortinet OT Security Platform alternatives: Claroty xDome, Palo Alto Networks OT Security
GPT-6 LunaClaroty xDome alternatives: Nozomi Vantage
Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
By buyer segment
The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.
Small business
Microsoft Defender for IoT leads by forty-nine points.
Microsoft Defender for IoT49%#1 of 11
Tenable OT Security0%#8 of 11Mid-marketThe figures above
Microsoft Defender for IoT leads by thirty-six points.
Microsoft Defender for IoT38%#1 of 11
Tenable OT Security2%#6 of 11Enterprise
Microsoft Defender for IoT leads by nineteen points.
Microsoft Defender for IoT19%#2 of 9
Tenable OT Security0%#9 of 9What the models said about Microsoft Defender for IoT
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“often criticized for requiring integration with separate SIEM and SOAR tools, which can complicate deployment” Mistral Small · negative prompt · soft negative
“Microsoft Defender for IoT is generally well-regarded but can feel basic if not combined with others.” Grok 4.20 · negative prompt · soft negative
“Microsoft Defender for IoT has been criticized for its premium pricing and complex deployments.” Llama 4 Maverick · negative prompt · soft negative
“The top results suggest that Microsoft Defender for IoT is a recommended industrial and IoT device security tool for mid-sized B2B companies.” Llama 4 Maverick · paraphrase prompt · first choice
“Start with Microsoft Defender for IoT if you're already in the Microsoft ecosystem—it's the most cost-effective entry point” DeepSeek V4 Flash · direct prompt · first choice
“Defender for IoT OT site license XS at ~$70/mo per site up to 100 devices is the most accessible commercial starting point.” Muse Glimmer 30B · budget prompt · first choice
What the models said about Tenable OT Security
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Five of six in this category shown.
“Users report Tenable OT Security pricing can be "higher than expected for smaller plants," making it less ideal for truly limited budgets.” Kimi K2 · budget prompt · soft negative
“Limited features in some advanced reporting areas, can struggle with deep OT protocol analysis compared to pure-play OT vendors.” Qwen 3.7 Flash · negative prompt · soft negative
“I'd suggest starting with Microsoft Defender for IoT or Tenable OT Security” MiniMax M2.5 · budget prompt · first choice
“Often a simpler choice if your priority is vulnerability/asset visibility, though the available review data suggests it's not always the cheapest option.” GPT-5.4 mini · budget prompt · alternative
“If you already use Tenable for IT vulnerability management, this integrates seamlessly and can be cost-effective as an add-on.” Grok 4.20 · budget prompt · alternative
Also compared
Microsoft Defender for IoT vs Claroty xDomeMicrosoft Defender for IoT vs Nozomi Networks GuardianMicrosoft Defender for IoT vs Fortinet OT Security PlatformMicrosoft Defender for IoT vs Armis CentrixMicrosoft Defender for IoT vs Forescout Vistaro PlatformMicrosoft Defender for IoT vs Palo Alto Networks OT SecurityClaroty xDome vs Tenable OT SecurityNozomi Networks Guardian vs Tenable OT SecurityFortinet OT Security Platform vs Tenable OT SecurityArmis Centrix vs Tenable OT SecurityTenable OT Security vs Forescout Vistaro PlatformTenable OT Security vs Palo Alto Networks OT SecurityAll twenty-eight head-to-head pages and the full ot/iot security standing
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.