All PRTG Network Monitor licenses are indefinitely valid. Each license is perpetual while maintenance plans need to be renewed. You can use one PRTG license per server. If you use the cluster functionality in PRTG, an additional server installation that acts as the failover node is included.

PRTG licenses differ by the number of sensors that you can add to your monitoring setup: 

* For very large environments, please also refer to our sizing recommendations. If you have more than 1,000 devices, check out Paessler PRTG Enterprise Monitor. 

For the 30-day Trial Edition, the number of sensors and devices is not restricted. The Freeware Edition includes up to 100 sensors for about 10 devices.  

If you have a large environment, you have several options, depending on your individual needs and requirements. With our PRTG Network Monitor licenses for large infrastructures, you can set up 5,000 sensors to monitor about 500 devices, or 10,000 sensors to monitor about 1,000 devices. 

If you want to monitor more than 1,000 devices, we recommend that you check out Paessler PRTG Enterprise Monitor, our monitoring solution for very large environments.

We recommend ordering online and paying with your credit card because this is the fastest option! To do so please visit the Paessler Shop, choose a product and click the "Buy now" button. Fill out the upcoming form, choose payment method "credit card" and follow the instructions. Your card will be charged immediately and you will then receive an invoice and your license key by email in a few minutes.

If you want to order online and pay by bank transfer, visit the Paessler Shop, choose a product, and click the "Buy now" button. Fill out the form, choose the desired payment method, and follow the instructions. You will receive a payment document via email to transfer the amount of your purchase to the Paessler bank account.

Alternatively, you can also send us your purchase order by email to: service@paessler.com

Yes, you can always upgrade to higher edition licenses within one product family at the price difference of the two licenses (at the time of the new purchase). For doing so, please login to our Online Shop or write to sales@paessler.com stating the license you are using now, which license you want to upgrade to, and, if available, the order number of your original purchase.

When purchasing a license you receive 12 months of software maintenance.

During the time of this Software Maintenance...

• ...you can log in to download the latest version for free at any time (this includes all bugfixes and all new versions of the product that you have purchased).
• ...you are entitled to receive priority email support via our support ticket system.

The Software Maintenance can be renewed after one year. The price will be 25% of the current list price of the original license, in effect when the renewal is ordered. For your convenience, we will give you advance notification by e-mail before your maintenance plan expires.

We offer our support directly from our headquarters in Nuremberg, Germany, working closely with our development department and our support team is actively involved in the Knowledge Base community. That way we guarantee the fastest and most constructive assistance possible. Our office is staffed Monday to Friday from 7 a.m. until 10 p.m. (UTC+1). You will receive an answer within 24 hours on business days.

Please note that after expiration, you will no longer be able to download the software or new versions from our website. When you extend your Software Maintenance plan we sum up the total maintenance packages and calculate the duration from the time of the initial purchase of the license on. In the case of support issues, priority is always given to customers with maintenance contracts.

To make the purchase of our products as seamless as possible, Paessler partners up with software companies from all over the world. This partner network makes it easy for you to find out more about Paessler products and to purchase your license locally. Find your nearest partner in our worldwide partner network.

You can find the detailed system requirements here.

You can find our detailed license terms and conditions here.

No, it is not possible to combine different licenses on one server, i.e. buying a PRTG 500 and a PRTG 1000 license does not mean that you can use 1500 sensors in one installation. PRTG will only accept one license key. If you need more sensors, you can upgrade to a license with more sensors by paying the list price difference.

We are so confident that you'll be delighted with our software that we offer a 30-day, risk-free, unconditional, money-back guarantee! That's right! Should you, for any reason whatsoever, not be satisfied with our software, just let us know within 30 days after purchase and we will refund your order in full.