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OT and IoT security · November 2026 Edition
Nozomi Networks Guardian vs Tenable OT Security
Two of fourteen models named Nozomi Networks Guardian first on the direct prompt; zero named Tenable OT Security. Nozomi Networks Guardian was named by fourteen of the fourteen models and Tenable OT Security by thirteen and Nozomi Networks Guardian carries 51 labels and Tenable OT Security 27, so the shares are not directly comparable.
Named in one category this edition.
Named in one category this edition.
First-choice share8%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate24%7%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#3#6A position in a field of 11; printed, not drawn.
Labels5127A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Nozomi Networks Guardian 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 Nozomi Networks Guardian · Microsoft Defender for IoT vs Tenable OT Security · Claroty xDome vs Nozomi Networks Guardian
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.
Nozomi Networks GuardianFirst choices, of fourteen modelsTenable OT Security
Direct20
Paraphrase202 against Nozomi Networks Guardian
Comparative30
Budget-constrained017 against Nozomi Networks Guardian · 1 against Tenable OT Security
Scale-constrained00
Negative103 against Nozomi Networks Guardian · 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, Nozomi Networks Guardian and Tenable OT Security were named in the same answer sixty times, of the 146 answers naming Nozomi Networks Guardian and the 78 naming Tenable OT Security. In those answers Tenable OT Security took the first choice zero times and Nozomi Networks Guardian twelve.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where Nozomi Networks Guardian and Tenable OT Security 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 | | | |
Nozomi Networks Guardian Tenable OT Security first choice named as an alternative argued againstblank: not namedEach cell is one answer, Nozomi Networks Guardian on the left and Tenable OT Security on the right.The direct prompt
The plain question, one answer per model, grouped by where Nozomi Networks Guardian and Tenable OT Security stood in it.
Nozomi Networks Guardian first, Tenable OT Security an alternative
2 of 14 modelsTenable OT Security was named in the answer but not as the choice, or not at all.Kimi K2Microsoft Defender for IoT, Nozomi Networks Guardian alternatives: OTORIO, SecuPi
Muse Glimmer 30BNozomi Networks Guardian alternatives: Claroty xDome, Fortinet OT Security Platform, Microsoft Defender for IoT, Tenable OT Security
Neither was the first choice, one was named
8 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
Perplexity SonarMicrosoft Defender for IoT alternatives: Fortinet OT Security Platform, Nozomi Networks Guardian, Tenable OT Security
Grok 4.20Claroty xDome alternatives: Dragos Platform, Nozomi Networks Guardian
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
Qwen 3.7 FlashClaroty xDome alternatives: Armis Centrix, Microsoft Defender for IoT, Nozomi Networks Guardian
Neither was named
4 of 14 modelsThe answer made no first choice from these two in this category.Llama 4 Maverickno first choice
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
Nozomi Networks Guardian leads by seven points.
Nozomi Networks Guardian7%#4 of 11Tenable OT Security0%#8 of 11Mid-marketThe figures above
Nozomi Networks Guardian leads by six points.
Nozomi Networks Guardian8%#3 of 11Tenable OT Security2%#6 of 11Enterprise
Nozomi Networks Guardian leads by eleven points.
Nozomi Networks Guardian11%#3 of 9Tenable OT Security0%#9 of 9What the models said about Nozomi Networks Guardian
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Avoid premium OT-native leaders like Claroty ... or Nozomi (great passive sensors)” Grok 4.20 · budget prompt · hard negative
“Most enterprise-grade platforms (like Dragos, Claroty, or Nozomi Networks) cost $100,000+ annually, which is out of reach for small budgets.” GLM 4.7 FlashX · budget prompt · soft negative
“Check ownership implications, roadmap control, data residency, and contract terms because it is now owned by Mitsubishi Electric.” Perplexity Sonar · negative prompt · soft negative
“Nozomi Networks Guardian / Vantage. Passive, agentless discovery and multi-site cloud console is the most cited fit for manufacturers with limited SOC staff.” Muse Glimmer 30B · direct prompt · first choice
“Choose Nozomi/Dragos if you want to understand the commands being sent and prevent malicious manipulation of physical processes.” Qwen 3.7 Flash · comparative prompt · first choice
“My default recommendation: Nozomi Networks Guardian, with Vantage for centralized management if you have multiple sites.” GPT-6 Luna · paraphrase 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 Nozomi Networks GuardianMicrosoft Defender for IoT vs Tenable OT SecurityClaroty xDome vs Nozomi Networks GuardianClaroty xDome vs Tenable OT SecurityNozomi Networks Guardian vs Fortinet OT Security PlatformNozomi Networks Guardian vs Armis CentrixNozomi Networks Guardian vs Forescout Vistaro PlatformNozomi Networks Guardian vs Palo Alto Networks 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.