Paessler PRTG Network Monitor

Overview

Paessler PRTG Network Monitor is self-hosted software for monitoring networks, systems, applications and other infrastructure from a Windows server. It is best suited to small and medium IT teams that want broad visibility, with features that also cover OT and IoT environments. Its sensor-based licensing supports several scales, but the server’s license limit makes sizing the deployment important.

More than 250 preconfigured sensors, live dashboards, scheduled reports and customizable alerts bring varied monitoring tasks into one system. Choose PRTG when you want to host monitoring yourself and can plan around sensor capacity; look elsewhere if your deployment needs multiple license sizes on one server or mobile access to a cluster.

Key features

Sensor-based monitoring: Each sensor measures one or more aspects of a device. PRTG covers systems, devices, network traffic, applications and other infrastructure metrics, with traffic monitoring and topology maps. Because capacity is measured in sensors as well as approximate devices, estimate what you need to monitor before choosing a tier.

Dashboards and reports: Live status dashboards give teams a current view, while scheduled reports support review over time.

Alerts and integrations: Customizable alerts can go by email, SMS, webhook or mobile push. Webhooks can send notifications to Slack and Microsoft Teams; compatibility also includes ServiceNow, Jira Service Management, PagerDuty and OpsGenie.

Distributed monitoring and API: Distributed monitoring supports coverage across infrastructure, and an API provides access to monitoring data and a way to develop custom features.

AI features: Paessler lists adaptive AI-driven baselines for automated anomaly detection and smart sensor recommendations. These features may help teams identify unusual readings and configure monitoring, alongside the product’s manual monitoring controls.

Security and updates: Component communications use TLS encryption, and interfaces support local and remote access secured with SSL/TLS. Subscriptions include the latest version, new features, security improvements and email support through a ticket system. Paessler’s Trust Center covers SOC 2 Type II, ISO 27001, ISO 9001 and GDPR compliance information.

Pricing

PRTG has a free edition, paid annual subscriptions and a 30-day trial. The paid tiers scale by sensor capacity; the device figures are approximate, so sensor needs—not just device count—should guide the choice.

PlanPriceCapacityFreeware EditionfreeUp to 100 sensors; about 10 devicesPRTG 500$200 a year (billed $200 per month paid annually)Up to 500 sensors; about 50 devicesPRTG 1000$358 a year (billed $358 per month paid annually)Up to 1,000 sensors; about 100 devicesPRTG 2500$742 a year (billed $742 per month paid annually)Up to 2,500 sensors; about 250 devicesPRTG 5000$1,300 a year (billed $1,300 per month paid annually)Up to 5,000 sensors; about 500 devicesPRTG 10000$1,642 a year (billed $1,642 per month paid annually)Up to 10,000 sensors; about 1,000 devicesThe free edition is a practical starting point for a small installation, but its 100-sensor ceiling is substantially below even the entry paid tier. PRTG 500 suits modest deployments of roughly 50 devices; larger tiers provide progressively more monitoring headroom. Each server accepts one license key, so you cannot combine different license sizes on the same server. Paid subscriptions include updates and email support. The mobile apps are free, but they do not support cluster setups.

Platforms

The core product is self-hosted and runs on Windows servers. PRTG also has web access, an API, and free iOS and Android apps for viewing monitoring data and receiving push notifications. Linux and macOS appear among its supported platforms, but the core server installation remains Windows-based.

Who it's for

PRTG fits small and medium IT infrastructures that need monitoring across devices, network traffic, applications and other infrastructure, and can operate an on-premises Windows server. Its distributed monitoring and OT and IoT features widen its relevance to teams with those environments. It is a weaker fit for organizations that require cloud-only deployment, need mixed license sizes on one server, or rely on mobile apps to monitor a cluster.

Pros and cons

Pro: More than 250 preconfigured sensors cover varied infrastructure metrics, reducing the need to build every monitoring measurement from scratch.

Pro: Dashboards, scheduled reports, multiple alert channels, distributed monitoring and an API provide several ways to see and act on monitoring data.

Pro: A free edition and multiple paid sensor limits let teams start small and select greater capacity as monitoring needs grow.

Con: Sensor limits mean device count alone is not enough to size a plan; the free edition tops out at 100 sensors.

Con: A server can use only one license key, preventing teams from combining license sizes on one server.

Con: The core server runs on Windows, and the free mobile apps do not support cluster setups.

Alternatives

For narrower monitoring needs, compare Network Monitoring, Network Performance Monitoring Software, DNS Monitoring Software, Hardware Monitoring Software, File Integrity Monitoring Software and Container Monitoring.

Dynatrace Kubernetes Monitoring is an alternative for Kubernetes monitoring, with hourly pod-based pricing and a free trial but no free plan.

Visual Sentinel is a freemium alternative with web and mobile platforms and a $6.00 monthly Solo plan.

StatusDrift is a freemium alternative whose free plan includes five monitors, five-minute checks, one status page, several notification channels and 90-day data retention.

Dotcom-Monitor offers a free plan for up to 25 targets, with monitoring at up to five-minute intervals from two locations.

ThousandEyes DNS Monitoring is a paid alternative for DNS monitoring with an annual subscription priced according to visibility needs.

DomainWarn is a freemium alternative focused on domain monitoring; its free plan covers three domains with checks every 15 minutes.

Nagios XI is a paid alternative with a free self-supported plan capped at seven nodes or 100 services, whichever comes first.

TLDTrack is a freemium alternative with a free plan for one website and four extra monitors.

Verdict

Choose PRTG if your small or medium infrastructure needs broad on-premises monitoring, flexible alerts and reporting, and you can size the deployment around sensor limits. Its strongest case is bringing diverse metrics into a self-hosted Windows-based system with multiple capacity tiers. Look elsewhere if you need cloud-only monitoring, mixed licenses on one server or mobile access to cluster setups.