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OT and IoT security · November 2026 Edition
Tenable OT Security vs Forescout Vistaro Platform
Zero of fourteen models named Tenable OT Security first on the direct prompt; zero named Forescout Vistaro Platform. Tenable OT Security was named by thirteen of the fourteen models and Forescout Vistaro Platform by nine and Tenable OT Security carries 27 labels and Forescout Vistaro Platform 17, so the shares are not directly comparable.
Named in one category this edition.
Named in one category this edition.
First-choice share2%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate7%6%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#6#7A position in a field of 11; printed, not drawn.
Labels2717A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Tenable OT Security 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 Tenable OT Security · Microsoft Defender for IoT vs Forescout Vistaro Platform · Claroty xDome vs Tenable OT Security
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.
Tenable OT SecurityFirst choices, of fourteen modelsForescout Vistaro Platform
Direct00
Paraphrase01
Comparative00
Budget-constrained101 against Tenable OT Security
Scale-constrained00
Negative001 against Tenable OT Security · 1 against Forescout Vistaro Platform
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, Tenable OT Security and Forescout Vistaro Platform were named in the same answer thirty times, of the 78 answers naming Tenable OT Security and the 58 naming Forescout Vistaro Platform. In those answers Forescout Vistaro Platform took the first choice zero times and Tenable OT Security zero.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where Tenable OT Security and Forescout Vistaro Platform stood in it.
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | | | |||
| GPT-5.4 mini | | | | |||
| Gemini 3.5 Flash | | |||||
| Perplexity Sonar | | | | | ||
| Grok 4.20 | | | ||||
| Mistral Small | | |||||
| DeepSeek V4 Flash | | | ||||
| Llama 4 Maverick | ||||||
| Qwen 3.7 Flash | | | | |||
| Kimi K2 | | |||||
| GLM 4.7 FlashX | ||||||
| MiniMax M2.5 | | |||||
| GPT-6 Luna | ||||||
| Muse Glimmer 30B | | | |
Tenable OT Security Forescout Vistaro Platform first choice named as an alternative argued againstblank: not namedEach cell is one answer, Tenable OT Security on the left and Forescout Vistaro Platform on the right.The direct prompt
The plain question, one answer per model, grouped by where Tenable OT Security and Forescout Vistaro Platform stood in it.
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
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
Muse Glimmer 30BNozomi Networks Guardian alternatives: Claroty xDome, Fortinet OT Security Platform, Microsoft Defender for IoT, Tenable OT Security
Neither was named
9 of 14 modelsThe answer made no first choice from these two in this category.Gemini 3.5 FlashClaroty xDome alternatives: Armis Centrix, Fortinet OT Security Platform, Microsoft Defender for IoT, Nozomi Networks Guardian
Grok 4.20Claroty xDome alternatives: Dragos Platform, Nozomi Networks Guardian
DeepSeek V4 FlashMicrosoft Defender for IoT alternatives: Claroty xDome, Nozomi Networks Guardian
Llama 4 Maverickno first choice
Qwen 3.7 FlashClaroty xDome alternatives: Armis Centrix, Microsoft Defender for IoT, Nozomi Networks Guardian
Kimi K2Microsoft Defender for IoT, Nozomi Networks Guardian alternatives: OTORIO, SecuPi
GLM 4.7 FlashXFortinet OT Security Platform alternatives: Claroty xDome, Palo Alto Networks OT Security
MiniMax M2.5Microsoft Defender for IoT, Nozomi Networks Vantage alternatives: Fortinet OT Security Platform, Palo Alto Networks Zero Trust 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
Level: the same share of first choices.
Tenable OT Security0%#8 of 11Forescout Vistaro Platform0%#10 of 11Mid-marketThe figures above
Level: the same share of first choices.
Tenable OT Security2%#6 of 11Forescout Vistaro Platform2%#7 of 11Enterprise
Forescout Vistaro Platform leads by two points.
Forescout Vistaro Platform2%#8 of 9Tenable OT Security0%#9 of 9What 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
What the models said about Forescout Vistaro Platform
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Four of five in this category shown.
“Can be resource-intensive, pricing model may be complex, initial configuration can be challenging.” Qwen 3.7 Flash · negative prompt · soft negative
“Start by evaluating Forescout or Claroty” Claude Haiku 4.5 · paraphrase prompt · first choice
“Forescout offers deep packet inspection for IoT/OT protocol analysis combined with broad IoT/IT visibility in a single-vendor approach” Claude Haiku 4.5 · comparative prompt · alternative
“Forescout “$7,500/year base appliance/virtual deployment tier (~$15-$25/endpoint/year) 30-day virtual appliance evaluation license”” Muse Glimmer 30B · budget prompt · alternative
Also compared
Microsoft Defender for IoT vs Tenable OT SecurityMicrosoft Defender for IoT vs Forescout Vistaro PlatformClaroty xDome vs Tenable OT SecurityClaroty xDome vs Forescout Vistaro PlatformNozomi Networks Guardian vs Tenable OT SecurityNozomi Networks Guardian vs Forescout Vistaro PlatformFortinet OT Security Platform vs Tenable OT SecurityFortinet OT Security Platform vs Forescout Vistaro PlatformArmis Centrix vs Tenable OT SecurityArmis Centrix vs Forescout Vistaro PlatformTenable OT Security vs Palo Alto Networks OT SecurityForescout Vistaro Platform 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.