Index › IT › Security operations › OT/IoT security › Fortinet OT Security Platform vs Tenable OT Security
OT and IoT security · November 2026 Edition
Fortinet OT Security Platform vs Tenable OT Security
One of fourteen models named Fortinet OT Security Platform first on the direct prompt; zero named Tenable OT Security. Fortinet OT Security Platform was named by thirteen of the fourteen models and Tenable OT Security by thirteen and Fortinet OT Security Platform carries 28 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 share6%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate14%7%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#4#6A position in a field of 11; printed, not drawn.
Labels2827A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Fortinet OT Security Platform 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 Fortinet OT Security Platform · Microsoft Defender for IoT vs Tenable OT Security · Claroty xDome 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.
Fortinet OT Security PlatformFirst choices, of fourteen modelsTenable OT Security
Direct101 against Fortinet OT Security Platform
Paraphrase00
Comparative00
Budget-constrained211 against Tenable OT Security
Scale-constrained00
Negative003 against Fortinet OT Security Platform · 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, Fortinet OT Security Platform and Tenable OT Security were named in the same answer forty-three times, of the 90 answers naming Fortinet OT Security Platform and the 78 naming Tenable OT Security. In those answers Tenable OT Security took the first choice zero times and Fortinet OT Security Platform five.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where Fortinet OT Security Platform 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 | |
Fortinet OT Security Platform Tenable OT Security first choice named as an alternative argued againstblank: not namedEach cell is one answer, Fortinet OT Security Platform on the left and Tenable OT Security on the right.The direct prompt
The plain question, one answer per model, grouped by where Fortinet OT Security Platform and Tenable OT Security stood in it.
Fortinet OT Security Platform first, Tenable OT Security not the choice
1 of 14 modelsTenable OT Security was named in the answer but not as the choice, or not at all.GLM 4.7 FlashXFortinet OT Security Platform alternatives: Claroty xDome, Palo Alto Networks OT Security
Neither was the first choice, one was named
7 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
Mistral SmallClaroty xDome, Microsoft Defender for IoT alternatives: Dragos Platform, Nozomi Networks Guardian, Tenable OT Security
MiniMax M2.5Microsoft Defender for IoT, Nozomi Networks Vantage alternatives: Fortinet OT Security Platform, Palo Alto Networks Zero Trust OT Security
Muse Glimmer 30BNozomi Networks Guardian alternatives: Claroty xDome, Fortinet OT Security Platform, Microsoft Defender for IoT, Tenable OT Security
Neither was named
6 of 14 modelsThe answer made no first choice from these two in this category.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
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
Fortinet OT Security Platform leads by nine points.
Fortinet OT Security Platform9%#2 of 11Tenable OT Security0%#8 of 11Mid-marketThe figures above
Fortinet OT Security Platform leads by four points.
Fortinet OT Security Platform6%#4 of 11Tenable OT Security2%#6 of 11Enterprise
Fortinet OT Security Platform leads by nine points.
Fortinet OT Security Platform9%#4 of 9Tenable OT Security0%#9 of 9What the models said about Fortinet OT Security Platform
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Criticized for premium pricing (around $100K+/year for a single site) and complex deployments, making it less suitable for mid-market companies.” Mistral Small · negative prompt · soft negative
“Fortinet is a capable platform, but if your OT environment has strict patching windows, be cautious” DeepSeek V4 Flash · negative prompt · soft negative
“OT features may be less mature than pure-play vendors, requires careful segmentation design.” Qwen 3.7 Flash · negative prompt · soft negative
“Fortinet OT Security Platform looks like the strongest budget-conscious choice for many small-to-mid organizations” GPT-5.4 mini · budget prompt · first choice
“Fortinet offers a cost-effective OT security solution with strong segmentation capabilities” Claude Haiku 4.5 · budget prompt · first choice
“Fortinet is widely considered the best fit for this specific segment.” GLM 4.7 FlashX · direct 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 Fortinet OT Security PlatformMicrosoft Defender for IoT vs Tenable OT SecurityClaroty xDome vs Fortinet OT Security PlatformClaroty xDome vs Tenable OT SecurityNozomi Networks Guardian vs Fortinet OT Security PlatformNozomi Networks Guardian vs Tenable OT SecurityFortinet OT Security Platform vs Armis CentrixFortinet OT Security Platform vs Forescout Vistaro PlatformFortinet OT Security Platform vs Palo Alto Networks 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.