LibreNMSvs
Icinga
Icinga: For broader infrastructure monitoring beyond network devices, with support sold directly by the project's own company
LibreNMS
Free, community-driven network monitoring with commercial support sold by a third-party partner, not the project itself
As of 1 September 2026, LibreNMS is free to use. An open source, auto-discovering network monitoring system built on SNMP polling, maintained by an open community rather than a company. Softwr lists it under Networking. LibreNMS is made by LibreNMS (open source project), available on Linux, Web.
Overview
What LibreNMS does
LibreNMS auto-discovers network devices and polls them over SNMP for interface, hardware and service metrics, storing time-series data and presenting it through a web interface with alerting, a mobile-friendly dashboard and an API. It forked from Observium and has been developed as a community project since, with contributions from users and companies that rely on it rather than a single vendor roadmap. The commercial structure buyers should know is that there is no LibreNMS company selling licences or a paid tier of the software itself; it is entirely free and open source. Commercial support with an SLA is offered exclusively through a designated partner, Config Services Ltd, rather than the project maintaining its own support arm, so buying support means contracting with that third party specifically rather than with "LibreNMS" as a vendor. The project is otherwise funded through OpenCollective donations and sponsorships and hosting contributions from companies like Katapult. Buyers are network teams comfortable self-hosting and self-supporting open source monitoring, or ones willing to contract the named partner for SLA-backed support and consultancy. The trade-off against PRTG or Auvik is no licence cost at all in exchange for needing in-house SNMP and Linux expertise, or a separate support contract if that expertise is not available internally.
What people use it for
- A network team wanting SNMP-based device monitoring with zero licence cost and full control over the deployment
- An organisation with in-house Linux and networking expertise that does not need a vendor support contract
- A team wanting an alternative to Icinga that is focused specifically on network device polling rather than general infrastructure monitoring
- A company wanting SLA-backed support for LibreNMS but without wanting to build that capability in-house, contracting the designated partner instead
Related searches
The honest half
Where it falls short
Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about LibreNMS.
- There is no official LibreNMS company; commercial support runs through a single designated third-party partner, Config Services Ltd, rather than a broad vendor support market
- Self-hosting and maintaining LibreNMS requires real Linux and SNMP expertise, and there is no vendor obligated to fix issues without a separate paid support arrangement
- Device and OS support quality varies because it is community-contributed, so obscure or newer hardware may have thinner or less accurate polling templates than mainstream vendors
- The web interface, while functional, is less polished out of the box than commercial tools like PRTG, and dashboard customisation takes more manual configuration
- Scaling to a very large device count requires manually configuring distributed polling, which is more operational work than a SaaS tool that scales transparently
- Project direction depends on community and contributor priorities rather than a company roadmap, so feature development pace and priorities can be less predictable than a commercial vendor's
Cross-shopped
What people choose instead of LibreNMS
Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.
- LibreNMSvsPRTG Network Monitor
PRTG Network Monitor: For a fully commercial alternative with vendor support bundled into the licence price
Pricing
What LibreNMS costs
Taken from the vendor's own pricing page. Prices move, so check before you buy.
LibreNMS
Free
- Full functionality
- No usage limits
- Community forum and GitHub support
Capabilities
Features
SNMP auto-discovery
Automatically discovers and classifies devices on a network via SNMP
Device and OS support
Broad library of device and OS-specific polling templates contributed by the community
Alerting
Configurable alert rules and notification transports including Slack and email
API
REST API for querying device and metric data programmatically
Distributed polling
Supports distributed polling nodes for large or geographically spread networks
Answered, with sources
Questions people ask
Each answer names the page it came from, so you can check it rather than take our word for it.
Is LibreNMS really free with no paid tier of the software?
Yes, the software itself has no licence fee; only optional third-party support is paid.
Who provides paid support?
Config Services Ltd is the designated partner offering SLA-backed support and consultancy for LibreNMS.
Does LibreNMS require SNMP access to every device?
Yes, its core monitoring approach relies on SNMP polling, so devices must have SNMP enabled and reachable.
Keep looking
Where to go from LibreNMS
- LibreNMS alternativesEvery product people weigh against it
- LibreNMS pricingPlans, floors and what the tiers exclude
- LibreNMS badgesWhich rules it meets, and the figure behind each
- All Networking softwareThe full category
- Best Networking softwareThe shortlist, and how it was cut
Best Networking software for
Compare LibreNMS with
- Icinga
- PRTG Network Monitor
- Auvik
- Zabbix
- pfSense
- OpenVPN
- Consul
- Domotz
- ThousandEyes
- Traefik
- Eclipse Mosquitto
- Nebula
- Netdata
- OPNsense
- ZeroTier
- Juniper Mist
- ThousandEyes
- Traefik
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Free plan12 researched notesAI-driven wireless and wired networking where a Wi-Fi Assurance subscription is a required, not optional, add-on
Pricing on request12 researched notesInternet and network path monitoring, owned by Cisco but still sold as a standalone product on its own annual contracts
Pricing on request11 researched notes
Softwr does not host reviews and shows no star rating for LibreNMS, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.
More on LibreNMS
LibreNMS alternatives
What people switch to, and what they give up
LibreNMS pricing
Every tier, and where the cost actually lands
Compare LibreNMS
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Best Networking software alternatives
Open source infrastructure monitoring, free at its core, with paid support and modules sold separately by Icinga GmbH
Open source core, with paid repository, module and support subscriptions sold separatelyNetwork monitoring for MSPs and IT teams priced per managed device or per collector, with published rates
Per collector or per managed device per monthAI-driven wireless and wired networking where a Wi-Fi Assurance subscription is a required, not optional, add-on
quote, hardware plus required Wi-Fi Assurance subscription
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Free tier plus published entry tiers, enterprise quote-only
Network observability platform built on flow and traffic data, sold on annual-only contracts starting around $24,000/year
Annual contract only, per tier
Cloud-managed networking hardware where the licence is mandatory and the hardware stops passing traffic if it lapses
quote, hardware plus mandatory recurring licenceCloud-based network monitoring and management priced by managed device count, quote-only
quote, per managed device