Paessler PRTG

Monitor IT infrastructures both efficiently & securely with the PRTG agentless monitoring tool


  • Secure agentless monitoring – even in remote networks
  • Quick & easy integration thanks to compatibility with many native protocols
  • Automated setup of your agentless monitoring

Our users give top ratings for monitoring with Paessler PRTG



Why PRTG is the right tool for your agentless monitoring


PRTG agentless monitoring makes your IT infrastructure more reliable and your everyday work easier. 











Agentless monitoring saves you time and resources

Corporate IT infrastructures are becoming more and more complex. Numerous physical devices are now integrated into one or more networks, including servers, computers, routers, switches, ports, storage systems, IoT systems, and more.

When IT monitoring tools monitor systems directly, without any additional preparation (e.g., the installation of software agents), then this is referred to as “agentless monitoring.” This direct approach is particularly time-saving and efficient.


What is agentless monitoring?

With agentless monitoring, the performance values of a network system are recorded directly – in other words, without software agents being installed on the system. Instead, APIs (as interfaces) or protocols are used to record all relevant monitoring data.


PRTG is compatible with all major vendors & manufacturers

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What does a monitoring agent do?

Agent-based monitoring always requires an intermediary, or a so-called “agent” that is preinstalled by the manufacturer or IT administrator on the system whose performance is to be monitored.

This agent is usually a small piece of software that records then sends monitoring data to the IT monitoring tool. On the other hand, with agentless monitoring data is sent to the monitoring tool directly via built-in protocols or APIs.


Start agentless monitoring with PRTG and see how it can make your network more reliable and your job easier.




3 good reasons to choose PRTG as your agentless monitoring tool


Paessler PRTG is an all-purpose agentless monitoring solution that combines the advantages of agentless monitoring with the benefits of agent-based monitoring.

Secure agentless monitoring – even in remote networks

Agentless monitoring is criticized as being unable to meet increasing security requirements and the needs of complex IT infrastructures that are often distributed across multiple locations. This is because agentless monitoring tools need remote access to monitor remote systems, which in turn can pose a security risk.

Not so with PRTG!

PRTG comes with remote probes that you can set up if your infrastructure consists of several distributed networks separated by firewalls from your local PRTG server. These probes monitor your system autonomously and transmit the collected data to the main PRTG server via TLS, providing you with a continuous, centralized overview of your entire monitoring environment.

Compatibility with protocols

In order to implement agentless monitoring, you need a monitoring tool that integrates as many native protocols as possible. PRTG does just that. It works with numerous protocols and technologies, including SNMP, WMI, HTTP/S, SSH, POP3, FTP, SMTP, NetFlow, sFlow, IP SLA, IPFIX, IPMI, Redfish, Modbus, MQTT, and many more. 

PRTG also comes with more than 250 preconfigured sensors for all the biggest manufacturers. For example, you can use PRTG SNMP sensors to monitor the system status of a Cisco device or Cisco UCS Blade Server, the hard disk of a Dell EqualLogic SAN storage system, or the free space of a logical hard disk.

Automated network discovery for quick setup

The PRTG Auto Discovery feature lets you set up your monitoring automatically after installation with just a few clicks. With this feature, PRTG automatically detects the subsystems and network devices in your IT infrastructure. The software uses preconfigured device templates to set up appropriate sensors so you can get started with your monitoring at once. The data from the detected devices is collected directly and displayed on easy-to-read dashboards.

PRTG also comes with custom sensors which allow you to personalize your monitoring as needed. With PRTG, you’ll never lose sight of your IT infrastructure and can prevent problems before they arise.


Start agentless monitoring with PRTG and see how it can make your network more reliable and your job easier.




PRTG makes your job easier

Our monitoring software frees you to focus on other tasks by promptly notifying you of potential issues.


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Save effort

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

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Save time

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

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Save money

80% of our customers report substantial cost savings with network monitoring. Your costs of licenses will likely pay for themselves within weeks.




IT experts agree: Paessler PRTG is a great solution for IT infrastructure monitoring


“All-around winning
network monitor”

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“The real beauty of PRTG is the endless possibilities it offers”


“PRTG Network Monitor
is very hard to beat”





Agentless vs. agent-based monitoring

The advantages of agentless monitoring

Agentless monitoring requires little work and preparation. Thanks to its convenience, it is the most popular method for monitoring networks.

  • With agentless monitoring, there’s no need to install agents on the network objects to be monitored. As a result, the monitored devices remain unhindered and continue to perform well.
  • Agents must be updated regularly. Agentless monitoring eliminates this tedious task.

The advantages of agent-based monitoring

  • Agent-based monitoring often allows for the collection of more detailed data. This is due to the fact that some software and hardware providers offer agents that transmit more values to the IT monitoring tool.
  • By collecting the data themselves, agents reduce the load on the main server.

The disadvantages of agent-based monitoring

  • Installing software agents on multiple servers is time-consuming, especially in large IT environments. Agentless monitoring therefore comes with less administrative hassle.
  • Agents often require lots of CPU and memory and can significantly slow down the devices on which they are installed, and in some cases even bring them to a complete halt.


“Excellent tool for detailed monitoring. Alarms and notifications work greatly. Equipment addition is straight forward and server initial setup is very easy. ...feel safe to purchase it if you intend to monitor a large networking landscape.”

Infrastructure and Operations Engineer in the Communications Industry, firm size 10B - 30B USD

Read the entire review at Gartner Peer Insights 


Start agentless monitoring with PRTG and see how it can make your network more reliable and your job easier.



More than just a monitoring tool:
Reasons our customers love PRTG



Create innovative solutions with Paessler’s partners

Partnering with innovative vendors, Paessler unleashes synergies to create
new and additional benefits for joined customers.


By integrating PRTG with Martello iQ, you can add a fast analytics layer to improve uptime, visualize your IT environment, and integrate all of your IT systems into a single pane of glass.

Read more


Integrating monitoring results from PRTG into NetBrain maps makes the foundation for network automation.

Read more


Siemon and Paessler bring together intelligent building technology and advanced monitoring and make your vision of intelligent buildings and data centers become reality.

Read more


PRTG the multi-tool

PRTG: The multi-tool for sysadmins

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

  • HTTP API: Access monitoring data and manipulate monitoring objects via HTTP requests
  • Custom sensors: Create your own PRTG sensors for customized monitoring
  • Custom notifications: Create your own notifications and send action triggers to external systems
  • REST Custom sensor: Monitor almost everything that provides data in XML or JSON format


Still not convinced?




More than 500,000
sysadmins love PRTG

Paessler PRTG is used by companies of all sizes. Sysadmins love PRTG because it makes their job a whole lot easier.


Monitor your entire IT infrastructure

Bandwidth, servers, virtual environments, websites, VoIP services – PRTG keeps an eye on your entire network.


Try Paessler PRTG for free

Everyone has different monitoring needs. That’s why we let you try PRTG for free.


Paessler PRTG 


Start agentless monitoring with PRTG and see how it can make your network more reliable and your job easier.




Network Monitoring Software - Version (June 26th, 2024)


Download for Windows and cloud-based version PRTG Hosted Monitor 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

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