Monitor network activity
with PRTG

  • Keep an eye on all your network activity
  • Monitor bandwidth, databases, and network devices
  • PRTG uses Flow technology, SNMP, and packet sniffing to monitor network activity

Free Download
  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime

Monitor network activity proactively

Network activity monitoring software provides you with an overview of your entire network, and allows you to keep a constant eye on all network processes. You’ll always know if everything is OK with your network, or if something needs your attention. And that means you can react proactively to potential problems and prevent costly crashes.

Three advantages of network activity monitoring with PRTG

Maintain total control of your network

Maintain total control of your network

The PRTG Network Monitor is a powerful network monitoring solution. Our tool lets you maintain constant control of your entire network, and ensures you always know the current status of all devices and connections.

Stay informed of network processes

Stay informed of network processes

A program is hogging bandwidth, network latency increases at certain times of the day, a printer has gone offline – PRTG informs you whenever something goes awry in your network. Check at any time to see if everything is OK with your network, and of course, reap the full enjoyment of obtaining an error-free report from PRTG!

Receive custom notifications

Receive custom notifications

The PRTG Network Monitoring Tool monitors all network activity, around the clock. In the event of an error, you can choose to be informed in real time. Define an unlimited number of threshold values and incidents for which you would like to receive an automatic notification. Depending on your needs, PRTG will send your alerts by email, SMS, or push notification.

Keep a constant eye on your network activity
– even while on the go

PRTG can be started within minutes and it's compatible with many mobile devices.


PRTG comes with all the features you need, plus more your IT infrastructure won't want to live without.


PRTG monitors these vendors and applications, and more, in one view!


PRTG monitors network activity thoroughly and efficiently


iAn IP address (internet protocol address) is a numerical representation that uniquely identifies a specific interface on the network. IP addresses are binary numbers but are typically expressed in decimal form (IPv4) or hexadecimal form (IPv6) to make reading and using them easier for humans.
Read more


Bandwidth usage 

Current bandwidth usage is a key figure for measuring the performance of your network. With PRTG, you can check to make sure your ISP is providing the amount of bandwidth that is promised in your agreement.

You can also see which service or server is using the most bandwidth. An easy-to-read diagram and straightforward maps let you recognize at a glance how much bandwidth is required for each protocol, IP address, and port.



When it comes to the day-to-day operations of your business, it is vital that your databases always be up and running. PRTG provides 24/7 monitoring of the query time, response time, and availability of your databases – whether they be Microsoft SQL, MySQL, PostgreSQL, or Oracle SQL.

The PRTG dashboard offers a global overview of the performance of your databases, and is entirely customizable. For a more in-depth look, use self-defined SQL queries to query specific data sets from your database, and then monitor the return value.


Network speed

Network speed is another key figure for measuring the performance of your network. Along with bandwidth, PRTG monitors the latency of your network. A spike in data transmission can result in a network bottleneck, which in turn will cause data to travel considerably slower, and in worst case scenarios provoke a crash.

PRTG clearly displays all the information you need with regard to network speed. If network speed takes a hit, you’ll be informed at once via your dashboard, or if you prefer, by way of a custom notification. PRTG measures network speed in LANs, WiFi networks and WANs.



To obtain a comprehensive picture of network activity, you will also need to keep a constant eye on your hardware. Routers and switches are the control centers of your network and send data packets to end devices. PRTG informs you of problems before actual failures arise, which means you will be able to avoid unnecessary downtime.

How PRTG monitors network activity

Network Activity Monitor:
Comparing 3 different technologies 

iWhat is a sensor?

In PRTG, “Sensors” are the basic monitoring elements. One sensor usually monitors one measured value in your network, e.g. the traffic of a switch port, the CPU load of a server, the free space of a disk drive. On average you need about 5-10 sensors per device or one sensor per switch port.

View video (3:26 min.)



SNMP is a simple protocol that can be used to monitor network activity. Its big advantage: SNMP is supported by many manufacturers and puts minimal strain on CPU and network loads. SNMP can be used to display a complete overview of your network activity. On the other hand, it does not allow for the in-depth analysis of network activity. To the SNMP Traffic Sensor

Flow technology

Flow technologies (NetFlow, jFlow, sFlow, IPFIX) are highly effective at monitoring larger networks. Most of the time, these protocols are specially designed for the routers and switches of a specific manufacturer (e.g. NetFlow for Cisco), but often they are supported by other manufacturers as well. To the Flow sensors

Packet Sniffer

Packet sniffing allows for the detailed analysis of network activity according to IP addresses, protocols, and data types. Because this monitoring is more comprehensive, it tends to put a greater strain on your CPU and network loads. To the Packet Sniffer Sensor


Overview: SNMP, Packet Sniffer, xFlow




Packet Sniffer

xFlow (IPFIX, NetFlow,
sFlow, jFlow)



Easy to complex (depending on
filter rules used)

Can be complex
(e.g., the switch must
be configured)

Traffic can be filtered




Differentiate bandwidth usage by protocol or IPs




PRTG can show Toplists (Top Talker, Top Connections, Top Protocols, custom)




Filter bandwidth usage by IP




Filter bandwidth usage by MAC address




Filter bandwidth usage by physical network port




Monitor network parameters other than bandwidth usage




CPU load on the machine running PRTG


Higher, depends on the
amount of traffic

Higher, depends on the
amount of traffic

Excess bandwidth usage of monitoring


None (except when monitoring
switch ports are used)

Depends on the traffic

Monitor network activity in different locations

Thanks to its remote probes, PRTG is not only LAN monitoring software, but can also be used to monitor network activity at a variety of different locations.

Simply install PRTG on one computer in your network (the PRTG Core Server) and then add one or more remote control to some others.

These probes gather monitoring data in the network to be monitored, and then send this data to the PRTG server for analysis. Remote probes can be installed in the same environment as the PRTG Core Server, or in a different network at a separate site. The only requirement is that the probes communicate continually with the server via the network or Internet.

This feature is invaluable, in particular for service providers or companies with multiple subsidiaries. PRTG lets you centrally monitor several different locations or customer networks with just one installation (and one license!).

You’ll therefore not only save time spent on administration, but also cold hard cash!

200,000 system administrators worldwide
trust our software. Every day.

We have compiled some reviews for you.


  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime

PRTG simplifies your day

Our monitoring software works for you and promptly notifies you of potential issues.
It frees you to concentrate on your day-to-day tasks with peace of mind.


PRTG saves time

With PRTG, you get one central monitoring tool for your servers and entire network. Enjoy a quick overview of your whole infrastructure via our dashboard and app.

PRTG saves worry

Customizing PRTG is a breeze. Getting started or switching from another network monitoring tool is easy thanks to the PRTG auto-discovery and pre-configured device templates.

PRTG saves money

80% of our customers report substantial or even exceptional cost savings in the area of network monitoring. The experience shows that the costs for licenses have paid for themselves within a matter of weeks.


“I particularly like having breakfast at home and just surveying my domain, and understanding what's working and what isn't.”

Steve Coppin, Oxford University

Award winning solution

We work hard on making our software as powerful and easy-to-use
as possible for our customers each and every day.
Of course it makes us proud when we get awards for that.



PRTG: The swiss army knife for sys admins

Adapt PRTG individually and dynamically to your needs relying on a strong API:

  • HTTP API: Access monitoring data and manipulate monitoring objects using HTTP requests
  • Custom Sensors: Create your own sensors for customized monitoring
  • Custom Notifications: Create your own notifications to send alarms to external systems
  • New REST API Sensor: Monitor almost everything that provides XML or JSON

German quality

Free Download
  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime


Made in Germany: The PRTG Network Monitoring Tool is the fruit of an engaged team. The company was founded by Dirk Paessler. The Paessler AG headquarters are located in the city of Nuremberg, in the heart of Germany. We combine typical German virtues such as high quality standards, industriousness, and commitment with international, cosmopolitan flair. Read more about our firm here. By the way: We are regularly looking for new recruits.

Case Studies: Airports, utility companies, banks, colleges, hospitals: PRTG is present in every industry. For each of our customers, business and organizational processes depend on the proper functioning of the network infrastructure. The PRTG customer satisfaction is close to 100%. Read in our case studies how our customers use PRTG.

Product tests: It goes without saying that we are convinced by the quality of PRTG. But what about the others? PRTG has always performed extremely well in tests. PRTG user “LanLine” sums it up best: “PRTG was already good several years ago, and has gotten better from version to version ever since.” Such has been our steadfast and sincere goal. Read more about monitoring software product tests and comparisons here.

Support: Our support team works hard every day to help customers solve their monitoring problems. Our goal is to resolve all inquiries within 24 hours (on business days). We've drafted a comprehensive manual and built up an extensive knowledge base featuring videos, webinars, and FAQs. All support, of course, is also included!

Getting started is easy: The trial version is free, which means you can try our monitoring tool risk-free. To switch to another version of PRTG, simply search for an appropriate license. You can upgrade any time you like.



Network Monitoring Software - Version (November 25th, 2019)


Download for Windows and hosted version available


English, German, Spanish, French, Portuguese, Dutch, Russian, Japanese, and Simplified Chinese


Up to 100 sensors for free (Price List)

Unified Monitoring

Network devices, bandwidth, servers, applications, virtual environments, remote systems, IoT, and more

Supported Vendors & Applications