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Network monitoring and management · November 2026 Edition

LibreNMS vs Nagios

Zero of fourteen models named LibreNMS first on the direct prompt; zero named Nagios. LibreNMS was named by thirteen of the fourteen models and Nagios by thirteen and LibreNMS carries 24 labels and Nagios 37, so the shares are not directly comparable.

LibreNMS

accepted challenger

Named in three categories this edition.

Nagios

criticized challenger

Named in five categories this edition.

First-choice share6%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate4%32%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#5#8A position in a field of 12; printed, not drawn.
Labels2437A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, LibreNMS reading right to left. Rank and label count are printed, not drawn.ManageEngine OpManager was named alongside these two in twelve of the fourteen direct answers. Zabbix vs LibreNMS · Zabbix vs Nagios · ManageEngine OpManager vs LibreNMS

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.
LibreNMSFirst choices, of fourteen modelsNagios
Direct00
Paraphrase00
Comparative003 against Nagios
Budget-constrained313 against Nagios
Scale-constrained00
Negative001 against LibreNMS · 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, LibreNMS and Nagios were named in the same answer forty-seven times, of the 70 answers naming LibreNMS and the 161 naming Nagios. In those answers Nagios took the first choice one time and LibreNMS two.

Every model, every framing

The eighty-four answers behind the chart above, one cell each: where LibreNMS 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
LibreNMS Nagios first choice named as an alternative argued againstblank: not namedEach cell is one answer, LibreNMS on the left and Nagios on the right.

The direct prompt

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

Neither was named

14 of 14 modelsThe answer made no first choice from these two in this category.
Claude Haiku 4.5no first choice
GPT-5.4 miniManageEngine OpManager alternatives: Datadog Network Monitoring, LogicMonitor, Paessler PRTG Network Monitor
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
Grok 4.20ManageEngine OpManager alternatives: Auvik, NinjaOne, Paessler PRTG Network Monitor
Mistral SmallManageEngine OpManager alternatives: Datadog Network Monitoring, Kentik, LogicMonitor, 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
Qwen 3.7 FlashManageEngine OpManager alternatives: LogicMonitor, Paessler PRTG Network Monitor, SolarWinds Network Performance Monitor, Zabbix
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
MiniMax M2.5ManageEngine OpManager alternatives: Datadog Network Monitoring, LogicMonitor
GPT-6 LunaAuvik alternatives: LogicMonitor, Paessler PRTG Network Monitor
Muse Glimmer 30BLogicMonitor alternatives: LiveNX, ManageEngine OpManager, 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.
LibreNMS2%#7 of 11
Nagios2%#8 of 11
The full small business standing →
Mid-marketThe figures above
LibreNMS leads by four points.
LibreNMS6%#5 of 12
Nagios2%#8 of 12
The full mid-market standing →
Enterprise
The order flips: Nagios leads at enterprise.
Nagios2%#11 of 15
LibreNMS0%#– of 15
The full enterprise standing →

What the models said about LibreNMS

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

“Five-minute defaults, notably associated with LibreNMS, can miss short congestion bursts and interface flapping” Perplexity Sonar · negative prompt · soft negative
“My suggestion: Start with LibreNMS. It strikes the best balance between a modern interface, automatic device discovery, and being entirely free forever” Qwen 3.7 Flash · budget prompt · first choice
“If you have a Linux admin on staff, start with LibreNMS (for network gear) or Zabbix (for everything).” Gemini 3.5 Flash · budget prompt · first choice
“Zabbix and LibreNMS are excellent open-source choices” Mistral Small · budget 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.