Networking · head to head
PRTG Network Monitor vs Splunk
PRTG Network Monitor
Networking
Infrastructure monitoring licensed by sensor count, not by device, which changes what a licence actually covers
- From
- On request
- Rated
- -
The short version
- Each has a real cost: PRTG Network Monitor licensing by sensor rather than device means the real cost per device is unpredictable until sensor density is measured; a small network of complex devices can need a much larger tier than device count alone suggests; Splunk no prices are published on any plan; every model requires contacting sales for an estimate
- They diverge on capability: PRTG Network Monitor covers Sensor-based monitoring, Splunk covers Log aggregation.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which PRTG Network Monitor and Splunk actually diverge.
| Attribute | PRTG Network Monitor | Splunk |
|---|---|---|
| Pricing model | Per sensor tier, billed monthly on an annual contract | quote |
| Platforms | Windows, Web, iOS, Android | Web, Api |
| Founded | Unknown | 2003 |
Identical on both: starting price (On request), free tier (No), user rating (Not yet rated), category (Networking).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in PRTG Network Monitor
- Sensor-based monitoring
- Auto-discovery
- Multiple monitoring technologies
- Maps and dashboards
- Cloud and hybrid deployment
Only in Splunk
- Log aggregation
- Real-time monitoring
- Data visualization
- Full-text search
- Custom dashboards
- Alert management
- Anomaly detection
- Log parsing
What people use each for
The jobs each tool is most often brought in to do.
PRTG Network Monitor
- An IT team wanting network, server and application monitoring in one product rather than assembling separate open source toolsnot Splunk
- An organisation that wants a Windows-installable on-premises monitoring server with a polished UI out of the boxnot Splunk
- A team sizing a monitoring purchase that needs to calculate sensor density per device carefully before committing to a tiernot Splunk
- A company wanting hybrid on-premises and cloud monitoring from the same licence and dashboardnot Splunk
Splunk
- Log search and analysis across infrastructurenot PRTG Network Monitor
- SIEM, SOAR and UEBA for a security operations teamnot PRTG Network Monitor
- Application performance and infrastructure monitoringnot PRTG Network Monitor
- Cloud, private cloud or on-premises deploymentnot PRTG Network Monitor
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
PRTG Network Monitor
- Licensing by sensor rather than device means the real cost per device is unpredictable until sensor density is measured; a small network of complex devices can need a much larger tier than device count alone suggests
- Different PRTG licence sizes cannot be combined on one server, so outgrowing a tier means a step change to the next tier rather than a smooth incremental add
- It requires a Windows server for on-premises deployment, which is an added infrastructure and patching burden compared with a Linux-native open source alternative
- Pricing is materially higher than open source options like Icinga or LibreNMS for comparable core monitoring capability, and the premium is for polish and support rather than unique functionality
- The free tier (100 sensors) is limited enough that most real deployments quickly need a paid tier, so it functions more as a trial than a genuinely usable free offering
- Custom sensor scripting and advanced configuration still require real monitoring expertise; the polished UI does not remove the underlying complexity of correctly instrumenting a large network
Splunk
- No prices are published on any plan; every model requires contacting sales for an estimate
- Three separate pricing models, workload, ingest and entity, so the same deployment costs different amounts depending on which was signed
- Ingest pricing bills on data volume, so cost tracks how much you log rather than how much value you get from it
- Security, observability and platform are priced separately
Pricing, plan by plan
PRTG Network Monitor
On request- PRTG 500$200/month
- Up to 500 sensors
- PRTG 1000$358/month
- Up to 1,000 sensors
- PRTG 2500$742/month
- Up to 2,500 sensors
- PRTG 5000$1300/month
- Up to 5,000 sensors
Splunk
On request- Observability Cloud - Infrastructure$15/month
- Infrastructure monitoring for per host/month pricing
- Unlimited users and ability to scale to petabytes of data
- Observability Cloud - App & Infra$60/month
- App and infrastructure monitoring for per host/month pricing billed annually
- Observability Cloud - End-to-End$75/month
- End-to-end observability for per host/month pricing billed annually
- On-Call$5/month
- On-call management for per user per month pricing billed annually
- Covers up to 10 seats
Which should you pick?
Choose PRTG Network Monitor if
- You need sensor-based monitoring.
- You work on Windows, Web, iOS, Android.
- You also want auto-discovery.
Choose Splunk if
- You need log aggregation.
- You work on Web, Api.
- You also want real-time monitoring.
Questions people ask
- Is PRTG Network Monitor or Splunk better?
- Neither clearly leads. PRTG Network Monitor starts at On request and Splunk at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, PRTG Network Monitor or Splunk?
- PRTG Network Monitor starts at On request and Splunk at On request.
- Does PRTG Network Monitor or Splunk run on more platforms?
- PRTG Network Monitor runs on Windows, Web, iOS, Android. Splunk runs on Web, Api.
- What is PRTG Network Monitor best used for?
- PRTG Network Monitor is most often used for an it team wanting network, server and application monitoring in one product rather than assembling separate open source tools, an organisation that wants a windows-installable on-premises monitoring server with a polished ui out of the box, a team sizing a monitoring purchase that needs to calculate sensor density per device carefully before committing to a tier, a company wanting hybrid on-premises and cloud monitoring from the same licence and dashboard. Of those, an it team wanting network, server and application monitoring in one product rather than assembling separate open source tools and an organisation that wants a windows-installable on-premises monitoring server with a polished ui out of the box are not what Splunk is typically brought in for.
- What can PRTG Network Monitor do that Splunk cannot?
- PRTG Network Monitor covers Sensor-based monitoring, Auto-discovery, Multiple monitoring technologies, Maps and dashboards. Splunk covers Log aggregation, Real-time monitoring, Data visualization, Full-text search.
Answered from the vendors’ own pages
PRTG Network Monitor: Is PRTG licensed per device or per sensor?
Per sensor. Each individually monitored metric counts as one sensor, so a single device is typically several sensors.
Splunk: What is Splunk's pricing model?
Splunk offers activity-based, ingest, or workload pricing options depending on the product. Splunk Observability Cloud and AppDynamics use per-host or per-vCPU monthly pricing billed annually. Splunk Cloud Platform and Splunk Enterprise require custom quotes from sales.
SourcePRTG Network Monitor: Can I combine two PRTG licence tiers on one server?
No, Paessler states different license sizes cannot be combined on one PRTG installation.
Splunk: How much does Splunk Enterprise cost?
Splunk Enterprise pricing requires contact with sales. The vendor offers data-ingest or workload pricing options, supports unlimited users, and can scale to petabytes of data, but specific rates are not published online.
SourcePRTG Network Monitor: Is there a free tier?
Yes, PRTG offers a free tier limited to 100 sensors, which most production networks will exceed quickly.
Splunk: What are the differences between Splunk's pricing options?
Splunk offers multiple pricing models: ingest-based pricing charges according to data volume brought into the system; workload-based pricing charges based on computing resources consumed by workloads. Both models apply to Splunk Enterprise and Splunk Cloud Platform. Standard support is included with product purchases; premium support is available as an add-on.
SourceRelated pages
More on PRTG Network Monitor
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