Buyer’s guide · network monitoring · catalogue checked September 29, 2026
Buying network monitoring? Start with the shortlist.
Eight monitoring products that IT managers actually put into trials, written up by what they cost to run, how the licence is counted, what the trial lets you prove, and where each one will disappoint you — plus the three discovery and troubleshooting tools worth having open while you buy.
- We host no files
- We are not any vendor
- Verdicts are editorial, never sold
The scorecard
Sorted by verdict, then as listed. A verdict is our editorial judgement, not a rating or a user score —what each label means.
| Product | Written up under | Pricing model | Deployment | Trial | Verdict |
|---|---|---|---|---|---|
| PRTG Network MonitorPaessler | Small business | Subscription tiered by sensor count | Self-hosted (Windows Server) or vendor-hosted | 30-day trial | ShortlistEasy to budget once you know your sensor count; the counting is the hard part. |
| ManageEngine OpManagerManageEngine (Zoho) | Enterprise | Per monitored device, by edition | Self-hosted (Windows or Linux) | 30-day trial | ShortlistStrong value per device; expect to spend time tidying defaults and alert rules. |
| AuvikAuvik Networks | Cloud-managed | Subscription per billable network device; quote-based | Cloud (SaaS) with an on-site collector | 14-day trial | ShortlistFastest route to a useful network map; costs follow your switch and firewall count. |
| SolarWinds NPMSolarWinds | Enterprise | Subscription scaled by monitored nodes; quote-based | Self-hosted (Windows Server + SQL Server) or SaaS observability | 30-day trial | SituationalDeep and proven at scale, but the platform footprint and add-on catalogue need a real owner. |
| NinjaOneNinjaOne | Cloud-managed | Per endpoint subscription; quote-based | Cloud (SaaS) with endpoint agents | Trial on request | SituationalExcellent if you are buying endpoint management anyway; thinner as a pure network tool. |
| CheckmkCheckmk GmbH | Enterprise | Commercial editions: subscription scaled by monitored services | Self-hosted (Linux, appliance, container) or SaaS | Trial of commercial editions; Raw edition has no licence fee | SituationalScales very well per euro spent, provided someone on the team likes Linux and rule sets. |
| LizardSystems Network ScannerLizardSystems | Discovery tools | Perpetual licence per machine for business use; free for personal, non-commercial use | Windows desktop application, runs on demand | Evaluation terms differ between vendor pages — check before use | SituationalUseful for mapping shares and access rights on Windows networks; no release since July 2021, so weigh its age. |
| ZabbixZabbix | Small business | No licence fee; optional paid support or hosted service | Self-hosted (Linux) or vendor cloud | Not needed — no licence fee | DIY baselineThe yardstick for every quote: zero licence cost, real staff-time cost. |
| LibreNMSLibreNMS community | Enterprise | No licence fee; community support | Self-hosted (Linux) | Not needed — no licence fee | DIY baselineSuperb SNMP coverage for nothing; support is a forum, not a contract. |
| Angry IP ScannerAnton Keks | Discovery tools | No licence fee | Desktop application, runs on demand | Not needed — no licence fee | DIY baselineAnswers “how many devices do we really have?” in minutes. It counts; it does not watch. |
| WiresharkWireshark Foundation | Discovery tools | No licence fee | Desktop application plus the TShark command line | Not needed — no licence fee | DIY baselineThe referee you call when a trial result looks wrong. A diagnostic tool, not a monitor. |
Start from your situation
Which shortlist fits you?
Network Monitoring for Small BusinessOne office, one or two people doing IT, and an owner who wants a single annual number.6 products compared →Enterprise Network MonitoringA network team, several sites or data halls, and a purchase that goes through procurement.7 products compared →
Cloud-Managed Network MonitoringBranch offices or client networks — and no appetite for running another server.6 products compared →
Discovery & Troubleshooting ToolsAbout to ask for quotes or start a trial, and want your own device count and your own evidence first.7 products compared →Read before you sign
What the price on the quote leaves out
The licence line is usually the smallest surprise. Across the products we cover, the costs that catch buyers out tend to be the same five, and every review on this site names them for that product.
- Add-on modules
- Flow analysis, configuration backup and log collection are frequently separate purchases.
- Somewhere to run it
- A self-hosted tool needs a server, its operating system licence, backups and patching.
- Collectors per site
- Remote probes or collectors may need their own hardware or virtual machines at every location.
- Staff hours
- Alert tuning in the first month and upkeep after it. Open-source tools shift nearly all cost here.
- The second renewal
- Introductory pricing ends. Ask what year two and year three look like before year one begins.
Head to head & how-to
Comparisons and buying guides
Comparisons
- Auvik vs PRTG: cloud network management or all-round monitoring?Auvik vs PRTG for IT teams and MSPs: SaaS network mapping and config backup against sensor-based monitoring of networks, servers and apps.
- PRTG vs ManageEngine OpManager: sensor tiers or per-device licensing?PRTG and OpManager compared for buyers: sensor vs device licensing, what each count includes, platforms, add-ons, and which suits which network.
- PRTG vs SolarWinds NPM: which monitoring platform fits your budget and team?PRTG's sensor-based subscription against SolarWinds NPM's node-based platform: licensing, architecture, network depth and total cost compared for buyers.
Buying guides
- How to estimate how many PRTG sensors you needA per-device-type sensor table, a worked 45-device example and the counting traps that push PRTG subscriptions into the next tier.
- Per sensor, per device, per node: network monitoring pricing explainedHow sensor-, device-, node- and endpoint-based licensing really add up, with worked examples for a 60-device office and a 600-device multi-site org.
- Network monitoring requirements checklist for buyers (RFP-ready)A copy-ready requirements checklist for choosing network monitoring software: coverage, alerting, deployment, security, licensing and support questions.
- A 14-day plan for trialling network monitoring softwareDay-by-day plan for a network monitoring trial: what to connect, what to break on purpose, and how to score vendors before the clock runs out.
How a verdict is reached
Six questions, asked of every product
- Cost you can forecastCan a buyer turn a device list into a three-year cost without a sales call?
- Time to first useful alertHow long from sign-up to an alert that a human would act on?
- Trial you can learn fromDoes the trial let you test what you would actually pay for?
- Hidden costsWhat does the quote leave out?
- Lock-in and exitIf the renewal price jumps, how painful is leaving?
- Support you can reachWho answers when monitoring itself breaks?
Shortlist We would put it into a buyer’s trial round for its category without reservation.
Situational Strong in a specific situation we name; a poor default outside it.
DIY baseline No licence fee. Either a do-it-yourself alternative we cost every commercial quote against, or a free tool you will use alongside any purchase — you pay in staff time instead.