15% Off All MetalPrints
Hurry, Offer Ends 12/15/2025
Get The DetailsIf you cannot find the email, you can typically retrieve this information from the Paessler website customer portal using your registered email address. 2. Activating or Changing Your License Key in PRTG
A: Install the trial edition. After 30 days it automatically becomes the freeware edition with 100 sensors. No manual key entry is needed for that transition [11†L17-L24].
| Myth | Truth | |------|-------| | "I can use a keygen to get sensors forever." | Keygens are malware. Paessler’s server-side validation prevents offline activation hacks. | | "The license key is stored in the registry; I can share it." | Keys are bound to your installation ID. Sharing invalidates both copies. | | "PRTG free version is just a trial." | False. Free version is permanent and fully functional at 100 sensors. | | "I need a key to update PRTG." | Updates require a valid paid license or the free version (no key needed). | | "Educational keys work for commercial use." | No. Paessler audits and will deactivate keys used improperly. |
Select the sensor tier that matches your network requirements. prtg network monitor license key
| Tool | Sensor/Device Limit | Learning Curve | |------|---------------------|----------------| | Zabbix | Unlimited (NB: each check counts as an "item") | High | | Checkmk Raw | Up to 750 services free | Medium | | LibreNMS | Unlimited (uses SNMP) | Medium | | Nagios Core | Unlimited | High | | Prometheus + Grafana | Unlimited | High |
Click to restart the PRTG core service and apply the new sensor limits. Managing and Optimizing Your Sensor Count
The most dangerous risk. Executable keygens, cracks, or "patches" downloaded from torrent sites or warez blogs are a primary vector for: If you cannot find the email, you can
Paessler licenses include 1 year of maintenance (updates and support). When that expires, you can renew at a discount. Your monitoring continues to work but you lose access to new versions and support.
: Purchase a specific sensor-tier license (e.g., PRTG 500, PRTG 1000) through the Paessler Shop . How to Enter or Change a License Key
Without a valid license key, PRTG will either run in a limited trial mode or the , which is capped at 100 sensors forever. After 30 days it automatically becomes the freeware
, the following recent research papers and technical studies provide interesting analyses of PRTG's unique sensor-based licensing model and its real-world implementation. Comparative Study: PRTG vs. Other Monitoring Tools
For larger deployments using multiple probe servers, the Enterprise Console requires a separate license key.