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Checkmk

Network Management and Monitoring

Open Source
Commercial Vendor
Free Tier
Paid Plans
E
Enterprise
Self-hosted
OpenMSP Score
67
74
Reddit Impact Score
Github Score
557M
2KStars
562Forks
112KCommits
GNU General Public License v2.0License
Oct 12, 2026Last commit

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Checkmk is a comprehensive IT monitoring system designed for scalability, flexibility, and low resource consumption. It supports infrastructure and application monitoring across physical, virtual, containerized, and cloud environments. With over 2,000 vendor-maintained plugins, Checkmk enables ITOps and DevOps teams to monitor servers, networks, storage, databases, applications, and cloud services. Available in multiple editions: Raw (open-source), Enterprise, Cloud (self-hosted and SaaS), and MSP. The platform features automated discovery, REST API integration, built-in agent management, customizable dashboards, and business intelligence capabilities.
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Key Features

Comprehensive Monitoring

Monitor everything from servers, networks, storage, databases to cloud services with 2000+ vendor-maintained plugins

High Performance Core

Scale up to millions of services monitored while maintaining small footprint with distributed architecture

Automated Discovery

Auto-discovery and auto-configuration with REST API integration and built-in agent management

Open Source Foundation

Raw edition is 100% free and open source (GPL v2) with enterprise upgrade path

Cloud-Native Support

Monitor Kubernetes, containers, AWS, Azure, GCP with OpenTelemetry integration

Business Intelligence

Map dependencies, aggregate services, and forecast infrastructure requirements

Pros and Cons

Pros

Comprehensive Coverage

Over 2,000 vendor-maintained plugins for servers, networks, applications, cloud, containers

True Open Source

Raw edition completely free and open-source (GPL v2) with no service limits

Exceptional Scalability

Monitor hundreds of thousands of hosts and millions of services from single server

Automated Operations

Auto-discovery, auto-config, REST API, and agent bakery reduce manual work

Cloud-Native Ready

Strong support for Kubernetes, containers, and ephemeral workloads

Cons

Steep Learning Curve

Complex setup can be overwhelming for beginners without Linux experience

UI Complexity

Feature-rich interface can feel overloaded for simple use cases

Enterprise Pricing

Service-based pricing can become expensive for large deployments

Limited Raw Features

Free edition lacks advanced automation and enterprise integrations

Documentation Gaps

Some advanced features lack detailed examples

Feature Comparison

Comments

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Frequently Asked Questions

vendor

Getting Started

OpenMSP is The MSP Knowledge Hub & Community Platform designed specifically for Managed Service Providers seeking to optimize their technology stack, reduce vendor costs, and discover open-source alternatives. We combine a comprehensive vendor directory, open-source solution catalog, and integrated community discussions to help MSPs make informed decisions.
Yes, completely free. Browse vendors and tools, read comparisons, and join community discussions - no cost, no registration required. OpenMSP is community-supported and focused on empowering MSPs to reduce costs and improve operational efficiency through open-source technology.
We help MSPs identify cost-effective alternatives to expensive commercial solutions, provide transparent vendor information, and connect you with proven open-source alternatives. Our platform enables MSPs to make informed decisions about their technology investments.
No account required for browsing vendors, reading comparisons, or accessing community content. Creating a free account with SSO (Microsoft, Google, or Slack) allows you to participate in discussions and save your favorite tools.

Platform Information

OpenMSP is currently community-supported. We focus on providing value to the MSP community first. Any future monetization will keep the core platform free for MSPs while maintaining our independence and commitment to unbiased information.
We focus exclusively on MSP needs with transparent vendor information and open-source alternatives. No vendor partnerships or sponsored listings - just honest, community-driven information to help MSPs make better technology decisions. Our biggest value is our community where MSPs help each other with questions, setup guidance, and sharing real-world experiences.
Our community of MSP professionals helps verify and update information. We also maintain direct research on tools and vendors to ensure accuracy. Community members can report outdated information, and we work to keep everything current.
OpenMSP was founded by Michael Assraf, who has extensive experience in the MSP industry and product leadership. As the former CEO & Founder of Vicarius, Michael grew a startup from $0 to $9M ARR with 500+ customers and deep experience working with MSPs, partners, and fundraising. OpenMSP represents his commitment to empowering the MSP community through better technology decisions and cost optimization.

Open-Source Tools & Alternatives

We assess tools based on active development, community size, documentation quality, production deployments by MSPs, and available support options. Tools must meet strict criteria for reliability and enterprise readiness.
Many open-source projects offer multiple support options including community forums, commercial support from vendors, professional services, and our community discussions where experienced MSPs share implementation guidance.