: Once purchased, your unique License Name and License Key will always be accessible via your Paessler account dashboard. 4. Step-by-Step: How to Activate Your PRTG License Key

Click to restart the PRTG core service and apply the new sensor limits. Managing and Optimizing Your Sensor Count

: Researchers noted that PRTG's "one sensor = one metric" rule can become expensive for large networks, as a single 24-port switch might consume over 100 sensors if monitoring multiple metrics per port.

: Every license key includes all available sensor types (SNMP, WMI, NetFlow, etc.) and features; you are only restricted by the number of sensors specified in your license.

Unlike many competitors that charge per device, PRTG uses a "sensor" model. A sensor is a monitoring unit that tracks a specific metric on a device (e.g., CPU load on a server, traffic on a switch port, or availability of a website). This modular approach allows for highly granular monitoring and avoids hidden costs for different types of sensors, as access to all sensor types is included in the subscription.

: Organizations using unlicensed software risk massive fines during software audits.

Entering your is a straightforward process within the PRTG web interface. Whether you are upgrading from a trial or renewing your subscription, follow these steps: Log in to your PRTG web interface as an administrator. Navigate to the main menu bar and select Setup (gear icon). Click on License in the menu. Click the Change License Key button.

A permanent free license limited to 100 sensors. Great for home labs, small offices, or learning PRTG.

for 30 days to test full capabilities. After 30 days, it automatically reverts to the 100-sensor Free Edition. Commercial Edition:

The following table summarizes the features and limitations of each PRTG license type:

Do you need help calculating your exact ? Share public link

He had the fix. He had the new configuration ready to push. But when he tried to commit the changes, the screen froze. A clinical, white dialogue box popped up: License expired. Enter a valid PRTG Network Monitor license key to continue.

: Users often begin with a 30-day free trial that offers unrestricted features to showcase the software's full potential before requiring a commercial key.

Up to 1,000 sensors. Designed for growing networks.

: A valid license key enables all features of PRTG, allowing administrators to set up an unlimited number of sensors, which are essentially monitoring elements that can track specific aspects of network performance.

If your maintenance agreement expires, your software will continue to function, but you will no longer receive updates, upgrades, or technical support. If your trial license expires without being upgraded, PRTG reverts to a 100-sensor free version. Where is the license key stored?