PRTG Network Monitor Freeware

What do you like best about the product?

Easy to use, with good integration possibilities and clear pricing.

What do you dislike about the product?

The subscription model has made the licence costs skyrocket since it became subscription-based. And the Windows-based main probe.

What problems is the product solving and how is that benefiting you?

Monitoring and observability across our infrastructure help ensure we’re alerted and can keep track of everything we need. It can also provide SLA reports when required.

What do you like best about the product?

Has he ability to customise what and how you monitor devices

What do you dislike about the product?

Configuration has a learning curve and isn't always intuitive

What problems is the product solving and how is that benefiting you?

Helps us monitor, devices and address either current issues or ones that are on the horizon

What do you like best about the product?

Easy to use, with lots of community resources available. There’s also an online Q&A section that’s helpful.

What do you dislike about the product?

The price is quite expensive. One host usually have at least 10 sensor. that means 500 sensor has only 50 hosts $2400 a year.

What problems is the product solving and how is that benefiting you?

Reduced downtime by enabling early alerting, and faster root-cause analysis thanks to correlated sensor data.

What do you like best about the product?

What I really like about PRTG is how quickly you can get meaningful monitoring without spending days on setup. In my case, I was able to start with basic device monitoring and then gradually build custom sensors using APIs and scripts. The flexibility is what stands out—especially when working with cloud services. I’ve used it to monitor AWS resources indirectly via custom endpoints, and the ability to visualize even non-standard data in a clean dashboard is very useful. Also, the alerting system is reliable—I rarely miss critical issues because notifications are quite configurable.

What do you dislike about the product?

One thing that could be improved is how it handles scaling in larger environments. As the number of sensors grows, managing them becomes slightly less intuitive, especially when you want to apply bulk changes or maintain consistency across similar setups. Also, while the UI is simple for basic use, some advanced configurations feel a bit scattered—you need to navigate multiple sections to fine-tune things. It’s not a deal breaker, but it takes time to get fully comfortable.

What problems is the product solving and how is that benefiting you?

PRTG helped me move from reactive troubleshooting to proactive monitoring. Earlier, we used to depend on manual checks or delayed alerts from different tools. Now, I have a centralized view of system health, including custom API checks, which helps identify issues before they impact users. It also reduced the time spent on debugging because historical data and logs are easily accessible. Overall, it improved system reliability and gave better visibility into both infrastructure and application-level metrics without needing multiple tools.

What do you like best about the product?

The auto-discovery feature saved me hours when setting up monitoring across a mixed environment. It picked up devices I had forgotten were even on the network.

What do you dislike about the product?

The initial licensing model felt confusing. I had to spend time figuring out how many sensors I actually needed versus what was bundled.

What problems is the product solving and how is that benefiting you?

Before PRTG, we had no unified view of our network health. Now, I can spot bottlenecks in real time and justify upgrades with hard data.

What do you like best about the product?

What stood out for me is how PRTG lets you think in terms of “what matters” instead of just raw metrics. I didn’t have to monitor everything blindly—I could create sensors that actually reflect business impact (like whether our ERP is reachable or if WAN latency crosses a threshold during peak hours).

What do you dislike about the product?

The biggest frustration for me is that sensor planning becomes a hidden complexity over time. Initially it feels simple, but as your environment grows, you start hitting limits—not just licensing limits, but also mental overhead in managing hundreds of sensors logically.

What problems is the product solving and how is that benefiting you?

Before using PRTG, we had a reactive setup—users would report issues before we even knew something was wrong. After implementing it, the biggest benefit wasn’t just alerts—it was predictability.

What do you like best about the product?

What stood out to me is how quickly I could move from “no visibility” to actually understanding what’s happening in my network. The auto-discovery is decent, but what I really liked is the flexibility of sensors — especially when I started creating custom ones for specific services.

What do you dislike about the product?

Another thing is that the UI, while functional, can feel a bit dated when you’re working on it for long hours. Some deeper configurations (like dependencies and inheritance) are not very intuitive and took me some trial and error to fully understand.

What problems is the product solving and how is that benefiting you?

One specific benefit I saw was during a storage issue — PRTG showed a gradual increase in disk queue length over days, which helped us fix it before it became a full outage.
Overall, it reduced firefighting and gave us more confidence in system stability. Instead of guessing, we now rely on actual data trends to make decisions, which made a big difference in how we handle incidents.

What do you like best about the product?

The way PRTG auto-discovers devices is genuinely helpful, but what stood out for me is how it suggests relevant sensors based on device type. For example, when I added a firewall, it didn’t just dump generic sensors—it actually recommended traffic, CPU, and session-based sensors that made sense.
The sensor-based licensing model initially felt confusing, but once I understood it, it gave me flexibility to monitor only what actually matters instead of entire bulky devices

What do you dislike about the product?

The initial setup can become messy if you don’t plan your sensor structure properly. I had to redo my device groups after a week because everything became cluttered.
The UI feels slightly outdated in some sections (especially the desktop console). The web interface is better, but still not very modern compared to newer tools.

What problems is the product solving and how is that benefiting you?

Before using PRTG, we had blind spots in network monitoring—especially with branch office devices. After implementation, I was able to detect intermittent WAN drops that users complained about but we couldn’t prove earlier.
It helped reduce downtime significantly because we now get alerts before users start reporting issues (like high CPU on core switches or storage nearing capacity).

What do you like best about the product?

Paessler PRTG stands out thanks to its user-friendly interface and its powerful real-time monitoring capabilities.

What do you dislike about the product?

Paessler PRTG’s sensor-based licensing model can cause costs to rise quickly.

What problems is the product solving and how is that benefiting you?

Paessler PRTG helps address key network issues, such as undetected failures and bandwidth bottlenecks,

What do you like best about the product?

The "Auto-Discovery" isn't just a gimmick. It actually maps out dependencies better than some expensive AI tools. I love that I can point it at a subnet, grab a coffee, and come back to a 90% complete network map with the correct OIDs already assigned to my Cisco gear

What do you dislike about the product?

The licensing model is based on "sensors," not devices. If you want to monitor 10 different metrics on a single core switch (CPU, RAM, and 8 high-traffic ports), that’s 10 sensors gone. It makes you feel like you have to "ration" your monitoring, which is a stressful way to manage a network

What problems is the product solving and how is that benefiting you?

It eliminated the "Is it the ISP or us?" argument. By setting up an external ping sensor alongside internal gateway monitoring, I can prove to management within 5 seconds where the packet loss is happening