Checkmk: The award-winning PRTG alternative
Modern hybrid architectures require the freedom to track deep data points without configuration caps. Checkmk simplifies scaling through a transparent, host-based licensing model that unifies traditional infrastructure and cloud-native workloads into a single, comprehensive point of visibility across your entire environment.
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Access DemoSwitch to Checkmk: Reduce IT monitoring licensing costs
Review how common PRTG scaling footprints translate to predictable Checkmk licensing:
Monitor up to the equivalent of 3,000 Checkmk services, which usually means about 100 devices
year / billed annually
Save up to 40% compared to PRTG Network Monitor
Monitor up to the equivalent of 12,000 Checkmk services, which usually means about 400 devices
year / billed annually
Save up to 62% compared to PRTG Network Monitor
Monitor up to the equivalent of 18,000 Checkmk services, which usually means about 600 devices
year / billed annually
Save up to 61% compared to PRTG Network Monitor
Monitor up to the equivalent of 30,000 Checkmk services, which means about 1,000 devices
year / billed annually
Save up to 39% compared to PRTG Network Monitor
*The above examples are based on the following ratio:
1 PRTG device = 1 Checkmk host = 10 aspects (or sensors) in PRTG = 30 services in Checkmk.
This ratio can vary between different devices and should be seen as an average for simplified plan comparisons.
**The cost comparison refers to selected products: PRTG Network Monitor and Checkmk Pro, as of July 1, 2026, and is based on publicly listed prices on the companies' websites, excluding any discounts, services, or bonuses.
Monitor your hybrid IT with the customer satisfaction leader
How Checkmk upgrades your operational workflow
Checkmk (Self-Hosted) |
PRTG Network Monitor |
|---|---|
| Licensing Model | |
| Predictable, Host/Service-based pricing. | Sensor/Aspect-based pricing (a single device can consume dozens of sensors). |
| Architectural Footprint | |
| Native Linux or Docker deployment; high-density, lightweight resource footprint. | Core server requires Windows Server hosting; higher CPU/RAM utilization at scale. |
| Remote Network Polling | |
| Centralized management via Remote Sites; Checkmk Ultimate include lightweight Checkmk Relays. | Requires manual setup and OS maintenance for dedicated Remote Probes at each site. |
| Triage & Incident Response | |
| Automated dependency mapping that contextualizes alerts to isolate the root cause. | Threshold-based sensor alerts; requires manual cross-device triage to connect dependencies. |
| Cloud & Hybrid Context | |
| Automatic AWS/Azure tag ingestion; dynamic host management for ephemeral Kubernetes lifecycles. | Standard cloud API polling; manual grouping often required for ephemeral assets and containers. |
Move to advanced hybrid IT observability
Your infrastructure has evolved beyond simple up/down status checks. Checkmk provides deep, multi-layered visibility across your entire hybrid estate while reducing administrative overhead.
Predictable, transparent pricing
Checkmk licenses the total number of monitored hosts/services, giving you unrestricted access to every available check and integration.
Auto-discovery & configuration
Checkmk automatically scans your network, identifies devices and their running services, and applies precise pre-set thresholds out of the box.
Secure, distributed architecture
Checkmk monitors remote networks via decentralized Remote Sites. Checkmk Ultimate introduces the Checkmk Relay—a lightweight container that collects data locally and routes it via mTLS without inbound open ports.
Structured migration without monitoring gaps
Moving from PRTG to Checkmk is designed to be swift and risk-free. Checkmk’s powerful auto-discovery ensures you maintain complete visibility over your infrastructure during the switch, eliminating blind spots while cutting down operational complexity.
Deploy your hub
Deploy via Docker containers, turnkey Virtual Appliances, or native Linux packages. Get the core server running quickly with minimal effort.
Automate discovery
Automatically discover operating systems, network topologies, and storage. Map Proxmox or Kubernetes using built-in special agents and cluster collectors.
Unify your view
Analyze cloud-native microservices side by side with traditional infrastructure data in a single platform.
Empower teams
Deliver clean dashboards that filter out alert noise, helping teams focus on data relevant to their operations.
Built for scale. Automated for efficiency.
Checkmk is trusted by industry leaders worldwide
Checkmk is initially easy to set up and later powerful to use. There are tons of possibilities to enhance and optimize the tool to fit your needs.
Rasmus P., Senior System Analyst
A leading IT infrastructure monitoring system which helps your business easily manage servers, keep track of your applications and monitor cloud infrastructure.
Sarah J., Management Consultant
Checkmk has very well-organized and easy-to-follow dashboards that display real-time data from various IT infrastructure. It’s transformed our business operations.
Jade J., Operational Risk Consultant
A low-cost and extremely well-performing monitoring tool with good support from both the developers and the product community as well.
Peter L., Principal System Engineer
I sleep well knowing that if there is an issue, Checkmk will find it before users start complaining. Compared to other IT monitoring solutions, Checkmk is the most efficient platform.
George P., Lead Technical Support Engineer
Checkmk vs other competitors
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Checkmk vs Zabbix
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Checkmk vs SolarWinds
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Checkmk vs Nagios
Compare traditional open-source foundations with scalable enterprise automation and modern observability.
Frequently asked questions
Yes. While Checkmk offers a lightweight agent for deep operating system analytics, it includes native, agentless support for SNMP (v1, v2c, and v3). If you are currently monitoring network switches, firewalls, or storage arrays in PRTG using SNMP, Checkmk will automatically discover and map those same data points out of the box.
PRTG uses a sensor-centric model where each metric—or specific group of channels—typically executes on its own individual query interval. When scaling to thousands of sensors, these repetitive, concurrent queries create cumulative disk I/O on the core server’s proprietary database and increase the overall polling load on both systems.
Checkmk utilizes a host-centered, rule-based approach. Instead of sending separate queries for individual metrics, a single Checkmk agent connection fetches the entire state of a host in a single pass (single-pass polling), processing the data in-memory. For agentless monitoring like SNMP, Checkmk employs optimized bulk requests, significantly reducing network traffic and keeping CPU and disk utilization under control across large environments.
Because PRTG uses a sensor-by-sensor hierarchical tree and Checkmk operates on a dynamic, rule-based tag and label system, configuration data cannot be directly copied over. However, Checkmk’s intelligent auto-discovery removes the need for manual migration; network sweeps automatically discover your infrastructure components and apply pre-defined monitoring rules.
Yes. Available in Checkmk Ultimate and Checkmk Cloud, the platform features native OpenTelemetry (OTel) metric ingestion via OTLP. This allows enterprise teams to cross-analyze application performance data against underlying hardware bottlenecks. By utilizing built-in dashboards for RED signals (Rate, Errors, Duration) side-by-side with traditional server and network metrics, system architects can accelerate root-cause analysis.
Available in Checkmk Ultimate and Checkmk Cloud, a Checkmk Relay is a lightweight container designed to monitor SNMP devices and hosts in isolated network segments that the central server cannot reach directly due to firewall restrictions. While Checkmk Pro centralizes configuration across standard Remote Sites, the Checkmk Relay operates as a stateless proxy that initiates secure, outbound-only mTLS connections to send data back to the central server, requiring zero local storage, zero independent data processing, and zero manual database tuning.
Not always. For a small network in a Windows-centric shop that wants an all-in-one, heavily GUI-driven tool with minimal configuration, PRTG's sensor-based appliance can be the simpler fit. Checkmk's edge shows at scale and in mixed or Linux estates, where service-based pricing and auto-discovery keep cost and upkeep predictable as you grow. If your environment is small and unlikely to expand, PRTG's model may be enough.
You can start testing immediately by filling out the form above. The trial includes 100% of our enterprise capabilities out of the box for 30 days.
Checkmk offers several flexible deployment options to fit your specific infrastructure needs:
- Linux Server Installation
The most common deployment method. You can install Checkmk directly on a Linux server, whether physical or virtual. Supported Linux distributions include Red Hat Enterprise Linux (RHEL) based systems, SUSE Linux Enterprise Server (SLES), Debian, and Ubuntu. - Cloud Infrastructure
Host your own Checkmk instance on AWS or Microsoft Azure. For the fastest setup, Checkmk Ultimate is available as pre-configured virtual machine images in the AWS and Azure Marketplaces, allowing you to bypass manual installation steps. - SaaS (Software as a Service)
Enjoy hassle-free setup and maintenance-free experience with Checkmk Cloud. Learn more about our SaaS platform. - Docker Containers
Checkmk can be deployed as a Docker container using official images for both Community and commercial editions. The lightweight, self-contained container environment allows for easy deployment and portability. View Docker documentation. - Virtual Appliance
A ready-to-use solution for hypervisors like VMware ESXi, Hyper-V, Proxmox, or VirtualBox. The appliance includes a hardened Debian-based OS and a dedicated web interface for easy, command-free configuration and management. Check virtual appliance details. - Physical Appliance
For a turnkey hardware solution, Checkmk offers physical appliances with pre-installed and optimized software, ready for deployment in data centers. These appliances support high-availability clustering and come in various models with different maintenance levels to ensure 24/7 monitoring uptime. See available devices.
Your environment stays intact. You can choose to transition to a commercial tier or downscale to our free editions without losing configuration data.
You can purchase a Checkmk license online or by requesting a quote from our sales team. Once you have your subscription, you simply enter your license credentials directly into your existing trial site.
The Checkmk server is not supported on Windows. However, you can monitor Windows hosts using the Checkmk agent. For the server itself, we suggest starting a Checkmk Cloud trial — our SaaS edition that runs entirely on our cloud infrastructure.
The easiest way to get started with a PoC is to start a trial, create a new site, and use the 30-day trial period. If you need more than 30 days to build your PoC, please contact our sales team, and we will be happy to issue an extended PoC license.
By using one of the self-hosted Checkmk editions you are in control of your monitoring data, which never leaves your infrastructure. The data for processing your account and subscription is securely stored and processed exclusively within the European Union. With Checkmk Cloud, you can choose where to keep all your data between the US (Virginia) and the EU (Frankfurt). In the latter case, your sensitive information never leaves EU borders.
Yes, Checkmk ensures full compliance with GDPR and other stringent EU regulations. Our security and data-processing practices are documented and designed to safeguard your data. You can read more on how we process data on the Privacy Policy page.
Experience powerful, hybrid IT observability at scale.
Deploy Checkmk in minutes to monitor your traditional IT infrastructure and modern cloud environments side-by-side within a single, highly efficient platform.
Note: competitive comparisons presented on this page are based on publicly available information, user reviews, and product documentation as of July 2026.