: PRTG offers a completely free version that supports up to 100 sensors forever. This is typically enough to monitor approximately 20 devices or servers.
: You lose access to the Paessler Knowledge Base and technical support, which is critical for complex IT monitoring. PRTG Network Monitor - Download
Here are some frequently asked questions about PRTG Network Monitor:
Using pirated monitoring software is particularly risky because these tools require high-level administrative access to your entire network to function. CISA warns of old vulnerabilities in Paessler PRTG servers
Hopefully this article has been useful for you.