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Network monitoring and management · November 2026 Edition

ManageEngine OpManager vs Nagios

Five of fourteen models named ManageEngine OpManager first on the direct prompt; zero named Nagios. ManageEngine OpManager was named by fourteen of the fourteen models and Nagios by thirteen and ManageEngine OpManager carries 44 labels and Nagios 37, so the shares are not directly comparable.

ManageEngine OpManager

accepted challenger

Named in seven categories this edition.

Nagios

criticized challenger

Named in five categories this edition.

First-choice share24%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate2%32%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#2#8A position in a field of 12; printed, not drawn.
Labels4437A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, ManageEngine OpManager reading right to left. Rank and label count are printed, not drawn.Paessler PRTG Network Monitor was named alongside these two in ten of the fourteen direct answers. Zabbix vs ManageEngine OpManager · Zabbix vs Nagios · ManageEngine OpManager vs Auvik

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 network monitoring and management page.

By framing

How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
ManageEngine OpManagerFirst choices, of fourteen modelsNagios
Direct50
Paraphrase70
Comparative203 against Nagios
Budget-constrained013 against Nagios
Scale-constrained00
Negative001 against ManageEngine OpManager · 6 against Nagios
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, ManageEngine OpManager and Nagios were named in the same answer forty-two times, of the 239 answers naming ManageEngine OpManager and the 161 naming Nagios. In those answers Nagios took the first choice one time and ManageEngine OpManager nine.

Every model, every framing

The eighty-four answers behind the chart above, one cell each: where ManageEngine OpManager and Nagios stood in it.
ModelDirectParaphraseComparativeBudget-constrainedScale-constrainedNegative
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
ManageEngine OpManager Nagios first choice named as an alternative argued againstblank: not namedEach cell is one answer, ManageEngine OpManager on the left and Nagios on the right.

The direct prompt

The plain question, one answer per model, grouped by where ManageEngine OpManager and Nagios stood in it.

ManageEngine OpManager first, Nagios not the choice

5 of 14 modelsNagios was named in the answer but not as the choice, or not at all.
GPT-5.4 miniManageEngine OpManager alternatives: Datadog Network Monitoring, LogicMonitor, Paessler PRTG Network Monitor
Grok 4.20ManageEngine OpManager alternatives: Auvik, NinjaOne, Paessler PRTG Network Monitor
Mistral SmallManageEngine OpManager alternatives: Datadog Network Monitoring, Kentik, LogicMonitor, SolarWinds Network Performance Monitor
Qwen 3.7 FlashManageEngine OpManager alternatives: LogicMonitor, Paessler PRTG Network Monitor, SolarWinds Network Performance Monitor, Zabbix
MiniMax M2.5ManageEngine OpManager alternatives: Datadog Network Monitoring, LogicMonitor

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.
Gemini 3.5 FlashLogicMonitor alternatives: Auvik, Datadog Network Monitoring, ManageEngine OpManager, Paessler PRTG Network Monitor
Perplexity SonarPaessler PRTG Network Monitor alternatives: Auvik, ManageEngine OpManager, SolarWinds Network Performance Monitor
DeepSeek V4 FlashAuvik alternatives: LogicMonitor, ManageEngine OpManager, Paessler PRTG Network Monitor
Llama 4 MaverickZabbix alternatives: Checkmk, Kentik, ManageEngine OpManager, New Relic, NinjaOne
Kimi K2Auvik alternatives: LogicMonitor, ManageEngine OpManager, Paessler PRTG Network Monitor
GLM 4.7 FlashXPaessler PRTG Network Monitor alternatives: LogicMonitor, ManageEngine OpManager, SolarWinds Network Performance Monitor, Zabbix
Muse Glimmer 30BLogicMonitor alternatives: LiveNX, ManageEngine OpManager, Paessler PRTG Network Monitor

Neither was named

2 of 14 modelsThe answer made no first choice from these two in this category.
Claude Haiku 4.5no first choice
GPT-6 LunaAuvik alternatives: LogicMonitor, Paessler PRTG Network Monitor

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
Level: the same share of first choices.
ManageEngine OpManager2%#6 of 11
Nagios2%#8 of 11
The full small business standing →
Mid-marketThe figures above
ManageEngine OpManager leads by twenty-two points.
ManageEngine OpManager24%#2 of 12
Nagios2%#8 of 12
The full mid-market standing →
Enterprise
ManageEngine OpManager leads by thirteen points.
ManageEngine OpManager15%#2 of 15
Nagios2%#11 of 15
The full enterprise standing →

What the models said about ManageEngine OpManager

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Two of two in this category shown.

“Part of a product line with frequent critical flaws ... High attack surface if not hardened.” Grok 4.20 · negative prompt · soft negative
“1. ManageEngine OpManager - a holistic network management software for performance monitoring, fault diagnosis, and troubleshooting.” Llama 4 Maverick · paraphrase prompt · first choice

What the models said about Nagios

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Two of two in this category shown.

“I'd suggest starting with Zabbix or Nagios Core since they're completely free and enterprise-grade” MiniMax M2.5 · budget prompt · first choice
“Stick to well-established, actively maintained tools like SolarWinds NPM, PRTG, Nagios, or Zeek” MiniMax M2.5 · negative prompt · alternative
Also compared

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.