LibreNMS is built for teams with Linux skills that want free, self-hosted monitoring with basic topology visualization. Its main limitation: topology visualization is a community plugin, not a first-class feature. These are the best LibreNMS alternatives for network discovery, topology visualization, and living documentation, starting with the one we build, Scanopy.
The best LibreNMS alternatives
Scanopy Our pick
A dedicated network documentation tool: one scan produces four switchable views (L2 physical, L3 logical, workloads, and applications) plus per-host service detection, at flat pricing regardless of host count, with a free, self-hostable Community edition.
NetDisco
NetDisco is for network teams that want free, open-source Layer 2 topology discovery and device tracking.
Scanopy vs NetDisco, head to head →Auvik
Auvik is for MSPs who need monitoring, alerting, and network maps in one cloud-managed platform.
Scanopy vs Auvik, head to head →NetBrain
NetBrain is for large enterprises that need network maps integrated with automation and troubleshooting workflows.
Scanopy vs NetBrain, head to head →SolarWinds Network Topology Mapper is for enterprise teams that standardize on Microsoft tools and need Visio-native network diagram exports.
Scanopy vs SolarWinds Network Topology Mapper, head to head →Domotz
Domotz is for cost-conscious MSPs who need monitoring, remote access, and basic network maps at a transparent price.
Scanopy vs Domotz, head to head →ManageEngine OpManager is for mid-market IT teams that want monitoring and visualization at a lower per-device cost.
Scanopy vs ManageEngine OpManager, head to head →PRTG Network Monitor is for teams already invested in the Paessler ecosystem who want built-in topology mapping alongside monitoring.
Scanopy vs PRTG Network Monitor, head to head →Faddom
Faddom is for enterprise IT teams mapping application dependencies for data center migrations and cloud transitions.
Scanopy vs Faddom, head to head →NetBox
NetBox is for network and automation teams building a structured source of truth to drive Ansible, Nornir, or Terraform.
Scanopy vs NetBox, head to head →LibreNMS alternatives compared
How LibreNMS and each alternative compare on discovery, the four topology views (L2, L3, workloads, applications), service detection, pricing, and licensing.
| ToolProduct name and link to vendor site | DiscoveryProtocols used to find devices and map connections | Network ViewsWhich topology views the tool produces from discovery. L2 Physical switch ports and links L3 Subnets, VLANs, routing Workload VM/container host nesting Application Service-dependency / app grouping Yes supported Tag ? unverified Greyed not supported | ServicesNo No service awareness Basic Common port detection Yes Application-level fingerprinting | PricingStarting price or pricing model | Open SourceOSI OSI-approved open source license Source available Source code available, restricted license No Proprietary |
|---|---|---|---|---|---|
| LibreNMS | SNMP CDP LLDP [10] | No | Free | OSI GPL-3.0 | |
| Scanopy | SNMP LLDP CDP ARP TCP/UDP | Yes240+ types | Starts at $11.99 monthly, unlimited hosts | OSI AGPL-3.0 | |
| NetDisco | SNMP CDP LLDP ARP [12] | No | Free | OSI BSD | |
| Auvik | SNMP CDP LLDP ARP [1] | Basic [2] | Per-device (contact sales) | No | |
| NetBrain | SNMP CDP LLDP ARP SSH/CLI | No | Enterprise (contact sales) | No | |
| SolarWinds NTM | SNMP WMI CDP LLDP ICMP [3] | No | Perpetual ~$1,570 (subscription shift unclear) [44] | No | |
| Domotz | SNMP ARP ICMP CDP LLDP mDNS NetBIOS [5] | Basic [6] | $1.50/device/mo [7] | No | |
| ManageEngine OpManager | SNMP CDP LLDP ARP [8] | No | From $95/yr (10 devices) [9] | No | |
| PRTG | SNMP WMI ICMP [13] | No | Free up to 100 sensors then tiered [4] | No | |
| Faddom | NetFlow/sFlow [23] | Basicapp dependencies [23] | Free up to 50 servers then from $19,000/yr [24] | No | |
| NetBox | ICMP SNMP SSH/CLI | No | Cloud and Enterprise: contact sales [42] | OSI Apache-2.0 |
Why Scanopy is a strong LibreNMS alternative
LibreNMS and Scanopy CE are both free and self-hosted, so that's the fair matchup here — Scanopy's AGPL-3.0 Community edition, not the paid product. LibreNMS is GPL-licensed, self-hosted network monitoring: strong SNMP auto-discovery, alerting, and graphing, with topology visualization as a secondary, plugin-based feature. Scanopy is dedicated documentation: one daemon, four switchable views (L2, L3, workloads, applications), and per-host service fingerprinting, with no monitoring or alerting.
The practical difference is what the mapping costs you in effort. LibreNMS's topology comes from the Weathermap plugin, which the LibreNMS docs say "does not work on any supported versions of PHP" and recommend against, pointing users to Custom Maps where the layout is hand-placed rather than generated. Standing it up also means managing Linux, PHP 8.2+, and MariaDB. Scanopy's map is automatic and is the core product, not a plugin. If you want free, self-hosted monitoring and you're comfortable administering the stack, LibreNMS is excellent and the maps are a bonus. If you want automatic network documentation that refreshes on a schedule without manual map layout, Scanopy CE is the closer fit — and it pairs naturally with LibreNMS if you want both.
LibreNMS has years of development behind it and an active community, and Scanopy does no monitoring — it isn't trying to replace it. For the documentation side specifically, Scanopy's automatic multi-view map is the stronger tool; for free self-hosted monitoring, LibreNMS is the one to beat.
Frequently asked questions
What is the best alternative to LibreNMS?
It depends on what you rely on LibreNMS for. If you want automatic network discovery with living L2, L3, workload, and application views and per-host service detection, Scanopy is the closest dedicated alternative — flat pricing regardless of host count, plus a free, self-hostable Community edition. LibreNMS itself remains the better choice when you specifically need teams with Linux skills that want free, self-hosted monitoring with basic topology visualization.
Is there a free or open-source LibreNMS alternative?
Yes. Scanopy, NetDisco, and NetBox are open-source (OSI-licensed). Scanopy's Community edition is free to self-host under AGPL-3.0 and produces the full L2, L3, workload, and application views; the paid plans add cloud hosting and support at flat pricing.
Why do teams look for a LibreNMS alternative?
The most common reason: topology visualization is a community plugin, not a first-class feature. Teams that need an up-to-date visual map of what is actually on the network — without standing up additional tooling — tend to compare dedicated documentation tools like Scanopy alongside LibreNMS.
Comparing just these two? See the focused Scanopy vs LibreNMS head-to-head. For all 13 tools side by side, see the full comparison of automated network diagram tools.
Sources
[2] Auvik - Can Auvik discover services on my network?
[3] SolarWinds - Network Topology Mapper
[4] Paessler - PRTG Pricing
[5] Domotz - Agentless Network Discovery for MSP Client Onboarding
[6] Domotz - Device TCP/UDP Ports/Services Discovery
[7] Domotz - Pricing
[8] ManageEngine - Discover Networks
[9] ManageEngine - OpManager Editions
[10] LibreNMS - Auto-Discovery
[12] NetDisco - Documentation
[13] Paessler - PRTG System Requirements
[23] Faddom - Agentless Application Dependency Mapping
[24] Faddom - Pricing
[42] NetBox Labs - Pricing (Cloud and Enterprise contact sales)
[44] SolarWinds NTM - Pricing (TrustRadius)
Try Scanopy
Scanopy deploys a lightweight daemon that discovers your network and builds a live topology map. No per-device fees, unlimited hosts. It pairs with whatever monitoring tool you already use.
Started as a homelabber, now deep in SNMP MIBs, Layer 3 topology, and service fingerprinting - building the network documentation tool I wished existed.