Many admins don’t realize that 100 sensors are completely free forever. No credit card, no key, no expiration. This is not a trial.
What can you do with 100 sensors?
Paessler also offers PRTG Hosted Monitor (cloud version) with the same 100-sensor free tier. prtg network monitor license key
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.
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. Many admins don’t realize that 100 sensors are
After payment, Paessler emails your unique license key. It looks like this:
PRTG-XXXXX-YYYYY-ZZZZZ-12345
Treat your PRTG license key like a critical asset. Here’s how to manage it effectively: Paessler also offers PRTG Hosted Monitor (cloud version)
PRTG regularly patches critical vulnerabilities. Without a valid license and maintenance, your pirated version remains exposed. CVE-2021-3280, for example, allowed unauthenticated remote code execution in older PRTG versions. Legitimate users patched quickly; pirates remained vulnerable.
You might be tempted to download a keygen or a pre-cracked version. Here is what actually happens in 99% of cases: