# Paessler PRTG Network Monitor vs Corelight Open NDR: which do AI models recommend for NDR, October 2026

IT AI Recommendation Index, October 2026 Edition, Network detection and response. Zero of fourteen models named Paessler PRTG Network Monitor first on the direct prompt; zero named Corelight Open NDR. Page: https://it-ai-index.com/security/network-detection-and-response/paessler-prtg-network-monitor-vs-corelight-open-ndr/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Paessler PRTG Network Monitor | 5% | #3 of 9 | 10% | 10 | 9 of 14 |
| Corelight Open NDR | 4% | #4 of 9 | 22% | 40 | 14 of 14 |

## The direct prompt, model by model

- GPT-5.4 mini: neither first, one named (first choices: ExtraHop RevealX, Vectra AI) (alternatives: Corelight Open NDR, Darktrace)
- Perplexity Sonar: neither first, one named (first choices: Vectra AI) (alternatives: Corelight Open NDR, Darktrace, ExtraHop Reveal)
- GLM 4.7 FlashX: neither first, one named (first choices: Darktrace) (alternatives: Cisco Secure Network Analytics, Corelight Open NDR, ExtraHop Reveal, FortiNDR, Vectra AI)
- MiniMax M2.5: neither first, one named (first choices: ExtraHop Reveal, Vectra AI) (alternatives: Arista Awake Security, Corelight Open NDR)
- GPT-6 Luna: neither first, one named (first choices: Vectra AI) (alternatives: Corelight Open NDR, ExtraHop RevealX)
- Claude Haiku 4.5: neither named (first choices: Darktrace) (alternatives: ExtraHop Reveal, Vectra AI)
- Gemini 3.5 Flash: neither named (first choices: Vectra AI Platform) (alternatives: Darktrace, ExtraHop Reveal, Stellar Cyber Open XDR)
- Grok 4.1 Fast: neither named (first choices: Vectra AI) (alternatives: Darktrace, ExtraHop (Reveal(x) or now part of Blend))
- Mistral Small: neither named (first choices: ExtraHop Reveal, Vectra AI Platform) (alternatives: Darktrace)
- DeepSeek V4 Flash: neither named (first choices: Vectra AI) (alternatives: CrowdStrike Falcon Insight, ExtraHop Reveal)
- Llama 4 Maverick: neither named (first choices: Gatewatcher AIonIQ) (alternatives: LMNTRIX)
- Qwen 3.7 Flash: neither named (first choices: ExtraHop RevealX) (alternatives: Cisco Secure Network Analytics, Darktrace, Vectra Cognito)
- Kimi K2: neither named (first choices: Vectra AI) (alternatives: Arista NDR, ExtraHop Reveal, Stamus Networks Clear NDR)
- Muse Glimmer 30B: neither named (first choices: Gatewatcher AIonIQ) (alternatives: Alert Logic Cloud Insight, CrowdStrike Falcon Insight, SentinelOne Singularity)

## What the models said about Paessler PRTG Network Monitor

- "basic PRTG setups... Do not rely on these for actual network defense." (Qwen 3.7 Flash, negative prompt, hard negative)
- "The Best All-Rounder: Paessler PRTG Network Monitor ... widely considered the gold standard for Small to Medium Businesses" (Qwen 3.7 Flash, paraphrase prompt, first choice)

## What the models said about Corelight Open NDR

- "Corelight — commercial Zeek sensors start around $150K+/year" (DeepSeek V4 Flash, budget prompt, hard negative)
- "For open-telemetry platforms such as Corelight buyers are warned about "Cost growth tied to throughput, sensor count, data retention, or site expansion"" (Muse Glimmer 30B, negative prompt, soft negative)
- "It can be powerful, but it may still require more in-house skill and infrastructure than a true budget buyer wants." (GPT-5.4 mini, budget prompt, soft negative)
- "vendors (like Corelight) that allow you to deploy unlimited virtual sensors and charge based on enterprise-wide licensing rather than gigabyte-level "taxes"" (Gemini 3.5 Flash, negative prompt, first choice)
- "SMBs can leverage Corelight or Awake Security for cost-effective monitoring" (Claude Haiku 4.5, budget prompt, first choice)
- "Corelight (based on Zeek) or open-source Zeek are the best choices" (Mistral Small, budget prompt, first choice)

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.