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Technology · head to head

Checkmk vs SonarQube

Checkmk logo

Checkmk

Technology

Comprehensive IT monitoring, open and flexible

From
Free
Free plan
Yes
Full reviewWebsite
SonarQube logo

SonarQube

Developer Tools

Code quality and code security for clean code, at every step

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Checkmk pricing calculated by service count, not hosts (approximately 30 services per host on average); SonarQube advanced Security add-on uses custom pricing
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Checkmk and SonarQube actually diverge.

Attributes where Checkmk and SonarQube differ
AttributeCheckmkSonarQube
CategoryTechnologyDeveloper Tools

Identical on both: starting price (Free), pricing model (subscription), free tier (Yes), platforms (Web), user rating (Not yet rated).

What people use each for

The jobs each tool is most often brought in to do.

Checkmk

  • Infrastructure monitoringnot SonarQube
  • System observabilitynot SonarQube
  • Enterprise compliance monitoringnot SonarQube

SonarQube

  • Code quality analysisnot Checkmk
  • Vulnerability detectionnot Checkmk
  • Security scanningnot Checkmk
  • Compliance reportingnot Checkmk

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Checkmk

  • Pricing calculated by service count, not hosts (approximately 30 services per host on average)
  • Professional support limited to 8-10 hours per week on base plans
  • Synthetic monitoring is separate add-on with per-test pricing

SonarQube

  • Advanced Security add-on uses custom pricing
  • Only private project lines of code count toward limits

Pricing, plan by plan

Checkmk

Free
  • Community (Self-Hosted)Free
    • No cost, forever
    • Up to ~100 hosts
    • Basic infrastructure monitoring
  • Pro (Self-Hosted)$190/month
    • Advanced analytics
    • Reporting
    • Distributed monitoring
  • Ultimate (Self-Hosted)$275/month
    • Full-stack observability
    • Advanced security compliance
    • 10 hours x 5 days professional support (upgradable to 24/7)
  • CloudAI (SaaS)$240/month
    • Fully managed cloud hosting
    • 99.5% uptime SLA
    • Supports up to 50000 services

SonarQube

Free
  • FreeFree
    • Supports up to 50000 lines of code in private projects
    • Never expires
    • Covers public projects
  • Team$34/month
    • 30+ languages
    • Code quality standards
    • Bug and vulnerability detection
  • Enterprise$null/custom
    • Advanced security reports
    • OWASP/CWE/PCI DSS compliance
    • Unlimited users and projects

Which should you pick?

Choose Checkmk if

  • You want to start without paying.
Checkmk review

Choose SonarQube if

  • You want to start without paying.
SonarQube review

Questions people ask

Is Checkmk or SonarQube better?
Neither clearly leads. Checkmk starts at Free and SonarQube at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Checkmk or SonarQube?
Checkmk starts at Free and SonarQube at Free.
Does Checkmk or SonarQube run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Checkmk for free?
Both have a free tier, so you can try either at no cost before committing.
What is Checkmk best used for?
Checkmk is most often used for infrastructure monitoring, system observability, enterprise compliance monitoring. Of those, infrastructure monitoring and system observability are not what SonarQube is typically brought in for.

Answered from the vendors’ own pages

Checkmk: Is there a free version of Checkmk?

Yes, Checkmk Community edition is free forever and supports up to approximately 100 hosts for basic infrastructure monitoring with no cost.

Source
SonarQube: How much does SonarQube cost?

SonarQube offers a free tier supporting up to 50000 lines of code in private projects, a Team plan starting at $34/month, and custom Enterprise pricing. Team plan includes 14-day free trial.

Source
Checkmk: How does Checkmk calculate pricing by host count?

Checkmk uses service-based pricing where each monitored aspect (file system, hardware sensor, switch port, metric) counts as one service. On average, there are approximately 30 services per host.

Source
SonarQube: Is SonarQube free?

Yes, SonarQube offers a free tier that never expires and covers both public and private projects up to 50000 lines of code in private projects.

Source
Checkmk: What is the difference between Checkmk Pro and Ultimate tiers?

Pro tier at 190 EUR/month includes advanced analytics and 8x5 support, while Ultimate at 275 EUR/month adds full-stack observability, advanced compliance features, and upgradable 24/7 support.

Source
SonarQube: What languages does SonarQube support?

SonarQube Team plan supports 30+ languages including common programming languages. Enterprise plan adds support for 40+ languages including ABAP, COBOL, and Apex.

Source
Checkmk: Does Checkmk offer a managed SaaS option?

Yes, Checkmk CloudAI is a fully managed SaaS tier at 240 EUR/month with 99.5% uptime SLA and support for up to 50000 services.

Source
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