Try out Checkmk

G2 Leader in IT Monitoring in 2025Gain a complete view of your hybrid IT infrastructure with a top-rated monitoring platform. Checkmk is highly automated, has everything you need out-of-the-box, and comes with over 2,000 vendor-maintained plugins.

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Why choose Checkmk as your Nagios alternative?
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Monitor everything

2,000+ vendor-maintained plug-ins, plus hundreds of Community plug-ins, and the possibility to import Nagios plugins

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Built-in monitoring

No more hassle with plug-ins or custom scripts for public cloud, Kubernetes, OpenShift, Docker, and databases

Top hyperscalers

Cloud-ready

Monitor advanced cloud use cases for AWS, Azure, and GCP in real-time, all on out-of-the-box dashboards

Centralized configuration

Auto-configuration

Automatically deploy, configure, and update agents, from a central interface and without requiring external tools

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Enterprise integrations

Native integrations with tools such as Slack, MS Teams, Jira, PagerDuty, Grafana, Cisco WebEx Teams, and many others

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Highly scalable

Monitor up to hundreds of thousands of hosts with little performance degradation, thanks to an ultra-efficient monitoring core

Automatic host discovery

Auto-discovery

Automatically detect hosts and services, complete with their metrics and pre-configured thresholds

Automatic host registration

Auto-registration

Automatically add and remove in real-time deployed hosts to your monitoring, without any manual interaction

Technical documentation

Broad documentation

Benefit from vast resources such as the official User Guide, monitoring best practice guides, video tutorials, and the Forum

Built-in dashboards

Advanced dashboards

Highly customizable dashboards with drag-and-drop built-in performance graphs, historical trends, statistical analyses, and capacity planning

Configurable notifications

Smart alerts

Configure granular alerts and automate issue escalation, automatically creating tickets in ITSM systems via native integrations

Automated reports

In-depth reporting

Automatically generate PDF reports for availability and SLA, with customizable scheduling and distribution options

 Request a quote today and today and discover the value and powerful monitoring of Checkmk

Quick & easy migration

Simple and documented migration with little effort required

Auto-discover all your hosts and services with metrics and thresholds

2,000+ official plug-ins, with support for importing Nagios plug-ins

Similar concepts such as Host, Service, Availability Status, etc.

Experience monitoring with a customer satisfaction leader
An all-in-one platform for all your monitoring requirements
Server monitoring
Cloud monitoring
Network monitoring
Application monitoring
Kubernetes monitoring
Database monitoring
Storage monitoring
IoT monitoring
Trusted and loved by
  • Adobe
  • Cisco
  • Fujitsu
  • Siemens
  • Volkswagen
  • University of Texas
  • Zalando
  • Fitbit
  • Intesa
  • HP
G2 Review

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

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G2 Review

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

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G2 Review

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

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G2 Review

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

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G2 Review

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

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Monitor at a glance. Resolve with a click.
Dynamic dashboards

Flexible, real-time dashboards

Powerful visualizations

Interactive and dynamic visualization options

Infrastructure monitoring

Hosts and Services overviews that enable fast drill downs

Log and event monitoring

Efficient processing and analysis of logs

Availability and SLA reporting

Precise availability and SLA fulfillment reporting

Notifications and alerts

Advanced notification system with many integrations

Simple, flexible configuration

Modern, efficient and automatic configuration system

Frequently asked questions about the Checkmk trial

Trials of Checkmk are now easier than ever - simply download the latest build of the Checkmk Cloud Edition and start using it. The Checkmk Cloud Edition includes all features of the Enterprise Edition. Features that are exclusive to the Cloud Edition (e.g., cloud dashboards, push agent, etc.) are marked as such in the GUI, so you won’t risk testing anything that won’t be available later on.

The trial expires after 30 days, at which point your site can either be licensed as a paid subscription, or you can continue using it for free for as long as you want. In the free state, your site will be limited to 750 services and one site.

To purchase a Checkmk license, you can either purchase online or request a quote.

Windows is not a supported operating system for Checkmk server. Nevertheless, Checkmk is available as an OVA (Open Virtualization Appliance), which can be loaded and launched on your desktop hypervisor for Windows like Proxmox and VMvare vSphere. The Checkmk virtual appliance contains a pre-installed Linux operating system, firmware, and a graphical interface. The web GUI allows you to configure the operating system, the appliance, and Checkmk without needing to use the Linux command line. More information about Checkmk virtual appliance deployments steps you will find in our comprehensive installation guide.

The easiest way to get started with a POC is to simply install the Cloud Edition, 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 who will be able to issue a POC license.

Ready to explore Checkmk - the Nagios alternative monitoring?

Download the free trial and see it in action.

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