Best Network Mapping Software (2026): 11 Tools Compared

Most network diagrams are out of date the week after someone draws them. A switch gets swapped, a cloud service gets added, and the map on the wall stops matching the network in the building.

That's the problem network mapping software solves. The eleven tools below are listed alphabetically and in no particular order, and every description comes from the vendor's own website, read this week. If security is the reason you're looking, my guide on improving your business security is a good companion read.

Network mapping tools at a glance

I checked the free plan column on each tool's own website, as of Oct 2026. Yes means the site names a free plan, a free version, a free account or an open source edition. Trial only means a time-limited trial. Not stated means the pages I read named neither, even where there's a button inviting you to try it, so check the vendor's page before you sign up.

Tool	Type	Good for	Free plan
Auvik	Cloud network management	Mapping plus everyday network management	Not stated
Domotz	Network monitoring and management	MSPs watching many client networks	Trial only
Faddom	Application dependency mapping	Seeing app-to-server dependencies	Trial only
Lansweeper	Cyber asset discovery	Finding every asset on the network	Not stated
NetBrain	Agentic NetOps platform	Big, mixed-vendor enterprise networks	Trial only
Netdisco	Web-based network management	Tracing IP and MAC addresses	Not stated
Nmap	Open source network scanner	Network discovery and security audits	Yes
openDCIM	Open source DCIM	Documenting data centre infrastructure	Yes
OpManager	Network monitoring with maps	Auto-drawn topology maps with monitoring	Trial only
SolarWinds Network Topology Mapper	Network topology mapper	Standalone automatic topology diagrams	Trial only
WhatsUp Gold	Infrastructure monitoring with maps	Topology inside traffic and performance monitoring	Trial only

Eleven network mapping tools to consider

Auvik

Best for: IT teams and MSPs who want network mapping alongside discovery, inventory, alerting and configuration management in one cloud network management tool.

Domotz

Best for: Managed service providers who want remote monitoring and network visibility across many client sites, with a 14-day trial on the full platform.

Faddom

Best for: Infrastructure teams who need to see which applications depend on which servers before a migration, segmentation project or outage review.

Lansweeper

Best for: Security and IT teams who want every asset across IT, OT, cloud and IoT discovered and kept in one validated inventory.

NetBrain

Best for: Large network operations teams who want to map and path a live, mixed-vendor network and hand routine troubleshooting to AI agents.

Netdisco

Best for: Network engineers who want a web-based tool that collects IP and MAC address data over SNMP, CLI or device APIs into PostgreSQL.

Nmap

Best for: Administrators and security testers who want the classic free, open source network mapper for discovery and audits, with the Zenmap interface.

openDCIM

Best for: Data centre teams who want a free, web-based infrastructure management application to document what sits where, without buying a commercial DCIM suite.

OpManager

Best for: Operations teams who want automated discovery that draws network topology maps and ties them to infrastructure monitoring and alerting.

SolarWinds Network Topology Mapper

Best for: Network admins who want a standalone topology mapper that discovers devices and plots the network automatically, with a 14-day trial.

WhatsUp Gold

Best for: IT teams who want to discover devices and visualize network topology inside a wider infrastructure, performance and traffic monitoring platform.

Where each tool fits

• Free discovery and audits: Nmap or Netdisco.
• MSPs managing many client sites: Domotz or Auvik.
• Maps inside monitoring you already run: OpManager or WhatsUp Gold.
• A standalone topology diagram: SolarWinds Network Topology Mapper.
• Large, mixed-vendor networks: NetBrain.
• Which apps depend on which servers: Faddom.
• A full asset inventory: Lansweeper.
• Racks and data centre documentation: openDCIM.

Why the UK's cyber agency cares about your map

The NCSC's 10 Steps to Cyber Security guidance on asset management warns that incidents can occur as the result of not fully understanding an environment, whether it's an unpatched service, an exposed cloud storage account or a mis-classified document.

That's the real case for mapping. A device you don't know about is a device nobody patches. So treat the map as a security control and judge any tool on how quickly it notices something new.

Scanner, diagram or live map?

A scanner finds what's out there when you run it. It's quick, often free, and ideal for audits, but it's a snapshot that starts ageing straight away.

A diagramming tool draws a neat picture for documentation and change planning. Useful, but only as current as the last discovery run.

A live map sits inside a monitoring platform and updates itself, so you see a link go down on the map itself. That's what busy IT teams and MSPs tend to need day to day.

What to check before you commit

1. Does discovery cover switches, wireless, servers and cloud?
2. How often does the map refresh by itself?
3. Can it show layer 2 and layer 3 views?
4. Will it export diagrams for audits and change requests?
5. Does it alert when an unknown device appears?
6. How does licensing scale with devices or sites?

Signs your network map is out of date

• Nobody knows what a device is. Run discovery now.
• The diagram predates the last refit. Rebuild it.
• Outages take hours to trace. Add a live map.
• Cloud services are missing. Widen the discovery scope.

Do you make network mapping or IT monitoring tools? Tool makers can ask to be considered for a featured place on this list.

My plain advice on network mapping software

Start with a free scan so you know roughly what you've got, then pick a tool that keeps the map current without anyone having to remember to run it. A map that updates itself beats a beautiful one that's six months old.

Whatever you choose, give one person ownership of the map and review it after every network change. If you're looking at the wider testing side as well, my guide to penetration test tools covers the next step.

Frequently asked questions

What is network mapping software?

It's software that discovers the devices on a network, works out how they're connected and shows that topology as a visual map.

Is there free network mapping software?

Yes. There are free, open source scanners and web tools for network discovery and documentation, alongside commercial platforms with free trials.

What's the difference between network mapping and monitoring?

Mapping shows what's on the network and how it connects. Monitoring watches the health and performance of those devices, and many tools now do both.

Why does network mapping matter for security?

The NCSC says incidents can come from not fully understanding your environment, such as an unpatched service. A current map helps you find those gaps.

How often should a network map be updated?

Ideally continuously. Tools that rediscover the network on a schedule keep the map close to reality.

Do MSPs need a different kind of tool?

Often, yes. Managed service providers usually want remote, multi-site visibility so they can map and monitor many client networks from one place.