Paessler PRTG

Pros: Tons of perfectly fitting Tools/Probes to be implemented, the real all in one solution for everyone, who has to monitor Servers or Applications.

Cons: The only thing one could complain about is the necessity of more than one license when setting up in completely separated and untrusted domains, as I do not get all ports open in between. But that is more an internal problem here in my company than one of the PRTG Software.

Overall: Have used several monitoring tools (Nagios, ...) throughout my career in IT, this is by far the most "satisfying" one.

Pros: Continuous development and updating as well as specialist support are trump cards in an enterprise environment.

Cons: It should also be possible to use it on linux systems as well as for windows ones.

Overall: I use the product for surveillance and system monitoring in an enterprise environment on a daily basis.

Pros: Sensors and devices are arranged in a logical and intuitive order that vastly simplifies management. The autodiscover feature makes initial onboarding of devices much easier. PRTG is exceptionally reliable and the auto-update feature keeps us current. The amount of data points it collects is astounding - over 2.4 million scans per day in our case. However, it's so easy to distill that down to usable dashboards and only the necessary alerts. The iOS app is also fantastic.

Cons: The ticketing feature hasn't been very useful for us, but I'm learning that's usually because of user error or that I've misunderstood how a component works. It's also been difficult to understand how to add other users/departments and scope their devices accordingly.

Overall: We are a nonprofit religious organization with five campuses. We have a very lean IT team but are able to maintain thousands of network endpoints; primarily because PRTG keeps a pulse on the health of the infrastructure. PRTG quite literally equates to the value of a full-time staff member in the amount of oversight it provides for us. We are able to be so much more proactive than we would without it.

Pros: PRTG is really easy to use. Very simple and efficient to use.

Cons: N/A.

Overall: We supervise our whole IT in only a few hours and the creation of maps is really efficient.

Pros: Great monitoring solution with solid notification and resolution system.
Provides notification to email and phone
Easy to create custom maps of sensors so that even non-technical people can check on statuses.
Covers things from server and switches to websites and custom sensors.
Reporting on up time for KPI purposes is very useful for us as well.

Cons: Support is primarily in Germany so responses times can be off a bit.
Adding new users could be a bit easier, but that could also be attributed to something that happens so infrequently.

Overall: This is one of my favorite products. We use close to 5000 sensors with fantastic results. We have close to 100 maps at this point that we use for various monitoring.
Really hard to beat for the prices, features, and support.

Pros: Monitoring network is now made easy with PRTG.
-Easy setup within 5-10mins to monitor few network elements.
-User friendly, able to allow user with read only access and availability of stats/data historically.
-Able to customize few graphs in one single view
-Lightweight software, doesn't have install separate services to run SMTP, webservices, etc.

Cons: The only cons, I think would be not able to set the alarms monitoring to only triggers during the selected period. (say between 8pm-11pm is the peak hours, I want the lower threshold alert to be triggered at this hour)

Overall: Overall, I am quite satisfied with the product. It has eased the network administrators to view and monitor traffic trending before looking at upgrading our infra. Engineering and Operation able to work together to accomplish same objective, to monitor network performance and plan for upgrades.

Pros: Setting up devices and monitors is painless and simple.
Web interface is easy to work with and manage.
Desktop and mobile applications are easy to work with and work very well.
Their support is top notch and very responsive.

Cons: Configuration of Antivirus can be a bit troublesome as some AVs like to mess with PRTG and its performance.

Overall: Incredible monitoring platform that provides perpetual licensing and self-hosting. What's not to like?

Pros: It is a very thorough network scanner, and gives you tons of information about every device it scans.

Cons: Not the most intuitive interface. Same device may show up in several different places based on how it categorizes it, and there doesn't appear to be an easy way to hide it from the redundant sections or move it to just one of them. We use certain IP address ranges for certain job functions and it was more difficult than necessary to basically draw fences around the ones I thought should be grouped. Also, this thing is slow. Advanced IP scanner takes about 3 minutes to scan the network and provide quite a bit of information. PRTG ran for 3 days and I still don't know if it was done.

Overall: As someone who has only tried the software, not a habitual user of it for several months, I'm not that impressed. I'm sure it's good at what it does, but I'm just not finding a good spot for it in my tool box.

Pros: - Many and many different sensors
- A lot of resources and knowledge base articles
- Frequent updates

Cons: - Can get pricey
- Needs a lot of customization
- Many false alerts

Overall: Using it for many years now and very happy with if, when adding a new device to it need to spend a little time to customize alert before it floods your mailbox.