# Intruder vs Tenable Nessus: which do AI models recommend for vuln management, October 2026

IT AI Recommendation Index, October 2026 Edition, Vulnerability management platforms. Two of fourteen models named Intruder first on the direct prompt; zero named Tenable Nessus. Page: https://it-ai-index.com/security/vulnerability-management-platforms/intruder-vs-tenable-nessus/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Intruder | 11% | #3 of 10 | 0% | 26 | 12 of 14 |
| Tenable Nessus | 4% | #8 of 10 | 30% | 23 | 11 of 14 |

## The direct prompt, model by model

- Llama 4 Maverick: intruder first (first choices: Intruder) (alternatives: ManageEngine Vulnerability Manager Plus, Rapid7's Insight platform)
- Kimi K2: intruder first (first choices: Intruder, Rapid7 InsightVM) (alternatives: Qualys VMDR)
- Grok 4.1 Fast: neither first, one named (first choices: Rapid7 InsightVM) (alternatives: Intruder, ManageEngine Vulnerability Manager Plus, Qualys VMDR, Tenable Vulnerability Management)
- Mistral Small: neither first, one named (first choices: Rapid7 InsightVM) (alternatives: Intruder, ManageEngine Vulnerability Manager Plus, SureCloud)
- DeepSeek V4 Flash: neither first, one named (first choices: Rapid7 InsightVM, Vicarius vRx) (alternatives: Intruder, Tenable Vulnerability Management)
- MiniMax M2.5: neither first, one named (first choices: Rapid7 InsightVM) (alternatives: Intruder, Tenable One)
- Muse Glimmer 30B: neither first, one named (first choices: Rapid7 InsightVM) (alternatives: Intruder, ManageEngine Vulnerability Manager Plus)
- Claude Haiku 4.5: neither named (first choices: Rapid7 InsightVM) (alternatives: ManageEngine Vulnerability Manager Plus, Microsoft Defender for Cloud, Tenable Vulnerability Management, Vicarius vRx)
- GPT-5.4 mini: neither named (first choices: Rapid7 InsightVM) (alternatives: Qualys VMDR, Tenable Vulnerability Management)
- Gemini 3.5 Flash: neither named (first choices: SecPod SanerNow, Vicarius vRx) (alternatives: CrowdStrike Falcon Spotlight, Microsoft Defender Vulnerability Management, Nucleus Security, Rapid7 InsightVM)
- Perplexity Sonar: neither named (first choices: Rapid7 InsightVM) (alternatives: ManageEngine Vulnerability Manager Plus, Microsoft Defender Vulnerability Management, Microsoft Defender for Cloud, Qualys VMDR, Vicarius vRx)
- Qwen 3.7 Flash: neither named (first choices: Rapid7 InsightVM) (alternatives: Qualys VMDR, Tenable Vulnerability Management)
- GLM 4.7 FlashX: neither named (first choices: Qualys VMDR) (alternatives: ManageEngine Vulnerability Manager Plus, Microsoft Defender Vulnerability Management, Tenable Vulnerability Management)
- GPT-6 Luna: neither named (first choices: Tenable Vulnerability Management) (alternatives: Qualys VMDR, Rapid7 InsightVM)

## What the models said about Intruder

- "The best vulnerability management platform for a mid-market B2B company is Intruder, a user-friendly exposure management platform designed for mid-sized businesses." (Llama 4 Maverick, direct prompt, first choice)

## What the models said about Tenable Nessus

- "Avoid trying to scrape out a "Free" version of Nessus; Tenable discontinued its unlimited community scanner" (Qwen 3.7 Flash, budget prompt, hard negative)
- "Avoid Standalone "Point-in-Time" Scanners for Enterprise VM ... Why to avoid them for enterprise VM" (Gemini 3.5 Flash, negative prompt, hard negative)
- "scanners like older Nessus/OpenVAS versions criticized for inaccurate Windows scans or signature mismatches" (Grok 4.1 Fast, negative prompt, soft negative)
- "the best starting point is Nessus Essentials (free) + a free vulnerability feed for on‑prem scanning" (GLM 4.7 FlashX, budget prompt, first choice)
- "I'd recommend Tenable Nessus Professional as the starting point" (Grok 4.1 Fast, paraphrase prompt, first choice)
- "useful for getting started with proven scanning technology, with the limitation of scan limits and lack of centralized reporting" (Muse Glimmer 30B, budget prompt, alternative)

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.