Paessler now offers monthly/yearly subscriptions with lower upfront costs. A 500-sensor subscription costs roughly $300/month. No perpetual license, but includes maintenance.
Trial License (30 Days)
Paid Commercial Licenses
Educational & Non-Profit Licenses
Legacy Permanent Licenses
Your "license key" is only required for paid tiers. The free version works indefinitely without any key entry.
If you are responsible for managing a network—whether it’s a small office with 50 devices or a sprawling enterprise with thousands of sensors—you have likely heard of PRTG Network Monitor. Developed by Paessler AG, PRTG is one of the most popular, all-in-one infrastructure monitoring solutions on the market. It tracks bandwidth, CPU load, application performance, virtual environments, and much more. prtg network monitor license key
When setting up PRTG, new users are immediately confronted with the need for a PRTG Network Monitor license key. This simple string of characters determines how many sensors you can use, whether you can access enterprise features, and whether your deployment is legal and supported.
In this article, we will demystify everything about PRTG license keys: what they are, the different types available, how to obtain a legitimate key, the risks of using cracked keys or "keygens," and answers to frequently asked questions.
Many admins don’t realize that 100 sensors are completely free forever. No credit card, no key, no expiration. This is not a trial. Trial License (30 Days)
What can you do with 100 sensors?
Paessler also offers PRTG Hosted Monitor (cloud version) with the same 100-sensor free tier.
Pro tip: Use PRTG’s "sensor factory" and "library" features to monitor multiple similar devices with fewer sensors. For example, you can monitor 10 Linux servers’ disk usage using a single "SSH Linux Disk Free" sensor template with auto-discovery. Paid Commercial Licenses
If you hit 101 sensors, PRTG does not shut down. It simply disables random sensors until you drop back to 100. You never lose data or access.
Mostly true, but clustering and unlimited user accounts require a paid license. Also, support is limited.