The Freeware Edition is free for personal and commercial use. Simply download PRTG Traffic Grapher and give it a try. The Freeware Edition is limited to monitoring up to three sensors (e.g. one reading on three devices or three interfaces on one device).
If you want to monitor more devices you must purchase a commercial license. Prices start at $99.95 (€79.95) and ordering is quick and simple. If you pay online with your credit card your license key is usually delivered to your email address in a matter of minutes!
And we make ordering totally risk-free with our 30-day Money-Back Guarantee!
PRTG Traffic Grapher is an easy to use Windows software for monitoring and classifying bandwidth usage. It provides system administrators with live readings and long-term usage trends for their network devices. The most common usage is bandwidth usage monitoring, but you can also monitor many other aspects of your network like memory and CPU utilizations.