Munin
Munin: A focused open-source choice for Linux metrics, graphs, thresholds, and plugins. Ranked #29 of 32 in Infrastructure Monitoring by our editors (6.9/10); pricing: Free plan; best for basic Linux metric graphing and thresholds.
At a glance
- Editor score6.9 / 10
- PricingFree plan
- Best forBasic Linux metric graphing and thresholds
- Free planYes
- Paid fromFree
- Founded2002
- Facts checked23 Sep 2026
Where it wins
- Master/node architecture supports centralized metric collection
- RRD storage provides configurable metric retention and web graphs
- SNMP, SSH, and custom plugins extend monitoring coverage
Where it doesn't
- Self-hosted deployment requires managing the monitoring environment
- Feature breadth is narrower than broader monitoring platforms
- No vendor-hosted deployment option is provided
Our verdict on Munin
Munin is an open-source, self-hosted infrastructure monitoring tool for servers, networks, SANs, applications, and other measurable resources. It is aimed at teams that want basic Linux metric collection, RRD-based storage, web graphs, threshold checks, and alert notifications under their own control. Its master/node architecture places a central master alongside nodes on monitored hosts, while agentless monitoring is available for special cases. The project dates to 2002 and includes a library of monitoring plugins for extending coverage.
Deployment and ecosystem fit are central to Munin’s design. A master collects metrics from monitored hosts, stores them in RRD files, and presents the results through web-based graphs and HTML pages. SNMP supports remote-device monitoring, while SSH enables asynchronous data retrieval. Automatic plugin configuration reduces some setup work, and custom plugins can be written in any language. RRD sizing is configurable, including a documented 400-day option at five-minute resolution, which gives administrators control over retention behavior.
Munin is a practical choice for Linux-focused teams that value open-source software, self-hosting, straightforward graphs, and threshold-based alerts. It is less suitable for organizations seeking a vendor-hosted service or a broader monitoring feature set beyond its established collection, storage, graphing, and plugin model. Choose it when control, extensibility, SNMP, and SSH retrieval matter more than a wide platform ecosystem; consider an alternative when the monitoring scope requires capabilities outside that focused design.
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Munin pricing
Munin fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Included hosts | Not verified |
| VM monitoring | Not verified |
| Service monitoring | Yes |
| Metrics retention | Not verified |
| Deployment model | Self-hosted |
| OS coverage | Multiple |
| Agentless monitoring | Yes |
| Deployment | Self-hosted |
| Platforms | Linux, Windows, macOS |
| Support | Docs, Community |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Pricing | Free plan |
| Website | munin-monitoring.org |
| Facts checked | 23 Sep 2026 |
Alternatives to Munin
- ZabbixA broad monitoring platform with a free self-hosted edition and flexible deployment options.9.4
- CheckmkA broad hybrid-monitoring platform with free open-source coverage and paid automation tiers.9.3
- Datadog Infrastructure MonitoringBroad infrastructure observability for cloud-native teams, with host-based pricing.9.2
Also Ranked In
Munin is ranked in 3 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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