PRTG Freeware Edition: Enterprise-Level Monitoring at Zero Cost
PRTG Freeware Edition is the fully functional, zero-cost tier of Paessler’s powerful network monitoring suite. While commercial versions scale up for large infrastructures, the Freeware edition is ideal for small teams or standalone admins who need visibility into their systems — and don’t want to build an entire monitoring stack from scratch.
With its web-based interface, auto-discovery, and deep sensor library, it offers serious capabilities out of the box — up to 100 sensors, completely free.
What It Offers (Up to 100 Sensors)
| Feature | What It Does |
| Auto-discovery | Scans subnets and auto-creates sensor trees per host. |
| SNMP and WMI monitoring | Gathers OS, hardware, and interface stats from Windows and network devices. |
| Ping, HTTP, port checks | Verifies host availability and service responsiveness. |
| Bandwidth monitoring | Uses SNMP or flow protocols (NetFlow, sFlow, etc.). |
| Sensor library | Includes sensors for VMware, SQL, Exchange, printers, RAID, and more. |
| Maps and dashboards | Custom visual layouts with live status and charts. |
| Built-in alerting | Threshold-based notifications via email, push, or custom scripts. |
| Mobile apps | View alerts and dashboards on Android or iOS. |
Where It Fits Well
– Small business or departmental IT monitoring
– Edge sites, remote branches, or test labs
– Internal home-lab or lab-style infrastructure
– Admins replacing Nagios or Zabbix for something more visual
– Use cases where 100 sensors are sufficient (e.g., 10–15 hosts)
Installation Overview (Windows Only)
1. Download the installer
https://www.paessler.com/prtg/download
2. Run as administrator
The wizard installs a local web server, database, and core engine.
3. Initial setup
– Define admin credentials
– Choose subnet(s) to scan
– Set SNMP/WMI credentials if needed
4. Review auto-discovery results
Devices are grouped, sensors added automatically.
5. Customize monitoring
You can add/remove sensors, create groups, define alert rules, and design dashboards.
6. Access via browser
Interface runs on port 8080 or 8443 by default. Fully web-based.
Notes on Freeware Limitations
– Hard cap: 100 sensors total
– No clustering or failover support
– One probe per installation — no distributed monitoring
– Runs only on Windows Server or Pro
– Paid version required for technical support
Why It’s Worth Using
PRTG Freeware gives small teams a taste of enterprise-grade monitoring without the usual complexity. Its built-in sensors cover most typical needs, from router uptime to Windows CPU load to SSL certificate age. The setup is guided, the UI is responsive, and it just works — even for admins who aren’t monitoring experts.
For shops that want visibility without having to learn an entire monitoring framework, PRTG Freeware often hits the sweet spot.
