PRTG by Paessler is not "freeware" in the open-source sense, but it offers a limited primarily by the number of sensors (monitoring elements). Once you exceed these limits, you must purchase a paid license.
Suddenly, a single standard server consumes 6 sensors. Add a switch with traffic sensors for 24 ports, and you’ve used nearly a third of your entire allotment. In a production environment, you will hit the 100-sensor wall within the first hour of setup. This forces you into a difficult position: do you monitor fewer devices, or do you monitor fewer metrics per device? prtg freeware limitations
This is a brilliant sales tactic by Paessler, but a frustrating user experience. It allows you to fall in love with the product, only to force you to gut your monitoring setup a month later. For many admins, the psychological toll of deleting working sensors leads them to swipe the credit card just to avoid the work. PRTG by Paessler is not "freeware" in the
While features are unlocked, the 100-sensor limit severely cripples advanced PRTG functionality. Add a switch with traffic sensors for 24
However, if you are a small business or a sysadmin looking for a truly free monitoring solution, you need to understand exactly how PRTG’s freeware limitations work before you invest time in deploying it. It is a fantastic product, but the "freeware" label comes with a very specific catch.