# ManageEngine OpManager vs Nagios: which do AI models recommend for network monitoring, October 2026

IT AI Recommendation Index, October 2026 Edition, Network monitoring and management. Seven of fourteen models named ManageEngine OpManager first on the direct prompt; zero named Nagios. Page: https://it-ai-index.com/network/network-monitoring-and-management/manageengine-opmanager-vs-nagios/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| ManageEngine OpManager | 22% | #2 of 12 | 6% | 35 | 14 of 14 |
| Nagios | 4% | #7 of 12 | 44% | 32 | 14 of 14 |

## The direct prompt, model by model

- Claude Haiku 4.5: manageengine opmanager first (first choices: ManageEngine OpManager, Paessler PRTG Network Monitor) (alternatives: Zabbix)
- Perplexity Sonar: manageengine opmanager first (first choices: ManageEngine OpManager) (alternatives: Datadog Network Monitoring, Domotz, LogicMonitor)
- Grok 4.1 Fast: manageengine opmanager first (first choices: ManageEngine OpManager) (alternatives: Progress WhatsUp Gold)
- Qwen 3.7 Flash: manageengine opmanager first (first choices: ManageEngine OpManager) (alternatives: Datadog Network Monitoring, LogicMonitor, Progress WhatsUp Gold, Zabbix)
- Kimi K2: manageengine opmanager first (first choices: ManageEngine OpManager) (alternatives: Auvik, Paessler PRTG Network Monitor, Progress WhatsUp Gold)
- MiniMax M2.5: manageengine opmanager first (first choices: ManageEngine OpManager, Paessler's PRTG Network Monitor) (alternatives: Zabbix)
- Muse Glimmer 30B: manageengine opmanager first (first choices: ManageEngine OpManager) (alternatives: Auvik, Datadog Network Monitoring, LogicMonitor, Progress WhatsUp Gold, Site24x7, SolarWinds Network Performance Monitor)
- Gemini 3.5 Flash: neither first, one named (first choices: Auvik) (alternatives: LogicMonitor, ManageEngine OpManager, Paessler PRTG Network Monitor)
- Mistral Small: neither first, one named (first choices: LogicMonitor) (alternatives: Datadog Network Monitoring, ManageEngine OpManager)
- Llama 4 Maverick: neither first, one named (first choices: Datadog Network Monitoring) (alternatives: Nagios, Netdata)
- GLM 4.7 FlashX: neither first, one named (first choices: Paessler PRTG Network Monitor) (alternatives: ManageEngine OpManager, SolarWinds Network Performance Monitor, Zabbix)
- GPT-5.4 mini: neither named (first choices: SolarWinds Network Performance Monitor) (alternatives: Datadog Network Monitoring, Paessler PRTG Network Monitor, Zabbix)
- DeepSeek V4 Flash: neither named (first choices: Auvik) (alternatives: Datadog Network Monitoring, LogicMonitor, Paessler PRTG Network Monitor)
- GPT-6 Luna: neither named (first choices: Auvik) (alternatives: LogicMonitor, Paessler PRTG Network Monitor, Site24x7)

## What the models said about ManageEngine OpManager

- "Be very cautious with ManageEngine; while feature-rich and cost-effective, their historical susceptibility to remote code execution requires rigorous security hardening" (Qwen 3.7 Flash, negative prompt, soft negative)
- "Has experienced multiple vulnerabilities including authentication bypass, remote code execution, and cross-site scripting issues" (MiniMax M2.5, negative prompt, soft negative)
- "ManageEngine OpManager and Progress WhatsUp Gold frequently hit the sweet spot of features vs. cost" (Kimi K2, scale prompt, first choice)
- "The best network monitoring tool for a company with a limited budget is ManageEngine OpManager" (Llama 4 Maverick, budget prompt, first choice)

## What the models said about Nagios

- "Nagios: Steer clear if you're not a highly technical user." (Grok 4.1 Fast, negative prompt, hard negative)
- "often an open-source option like Zabbix or Nagios Core, as they provide robust features at zero licensing cost" (Grok 4.1 Fast, budget prompt, first choice)
- "For most small businesses, Zabbix and Nagios Core are the top free choices" (Mistral Small, budget prompt, first choice)
- "Nagios Xi - a broad network and infrastructure monitoring tool with sensor-level control, suitable for mid-market IT teams." (Llama 4 Maverick, direct 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.