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Concordion

Free#16 of 29 in BDD Testing Tools

Concordion: A focused open-source choice for executable specifications and living documentation. Ranked #16 of 29 in BDD Testing Tools by our editors (6.7/10); pricing: Open source; best for living executable documentation.

6.7/10Editor score
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Concordion6.7 Visit Concordion

At a glance

  • Editor score
    6.7 / 10
  • Pricing
    Open source
  • Best for
    Living executable documentation
  • Paid from
    Free
  • Gherkin support
    Yes
  • Founded
    2006
  • Facts checked
    21 Sep 2026
Concordion screenshot

  • Where it wins

    • Turns natural-language specifications into executable tests
    • Generates living documentation with pass/fail results
    • Supports Selenium, JUnit, NUnit, and parallel execution

  • Where it doesn't

    • Distributed as open-source software rather than paid tiers
    • Execution is local rather than cloud-based
    • Best aligned with Java/JUnit or .NET/NUnit environments

Our verdict on Concordion

Concordion is an open-source specification-by-example tool for developers, testers, analysts, and stakeholders. It turns natural-language specifications into executable tests and living documentation, using HTML or Markdown files that display pass/fail results. The tool runs with Java and JUnit, while Concordion.NET supports .NET and NUnit. Its main appeal is to teams that want requirements, examples, and test outcomes connected in a readable format.

The standout capability is executable documentation. Specifications can include tables, verification of multiple examples, and links between specification suites and run commands. This gives teams a way to express behavior in natural language while retaining executable checks. An extension API supports custom commands and output, and parallel test execution is available through extensions. For browser scenarios, Concordion integrates with Selenium WebDriver; Java or .NET libraries cover other interfaces.

Concordion also fits established development and delivery workflows. Integrations include Gradle, Maven, Jenkins, IntelliJ IDEA, Eclipse, and Spring, alongside JUnit, NUnit, and Selenium WebDriver. Its execution model is local, and its focus is specification by example rather than a broad collection of testing modes. Teams seeking readable, versioned specifications with linked results should consider Concordion, especially within Java or .NET projects. Teams looking for cloud-based execution, built-in AI features, or packaged paid tiers should choose a different tool.

Your product? Our editors can test Concordion in depth and publish a review, labelled as paid · from $149/mo →

Concordion pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.
See plans on concordion.org

Concordion fact sheet

Free planNot verified
Paid fromFree
Gherkin supportYes
Supported languagesNot verified
Execution modeLocal
Parallel executionYes
Browser testingYes
API accessYes
DeploymentSelf-hosted
SupportCommunity, Docs
Built forSmall business, Mid-market, Enterprise (editorial estimate)
Integrations9 integrations: Selenium WebDriver, JUnit, NUnit, Gradle, Maven, Jenkins … See all →
PricingOpen source
Websiteconcordion.org
Facts checked21 Sep 2026

Concordion integrations

Concordion lists 9 integrations on its own site.

  • Selenium WebDriver
  • JUnit
  • NUnit
  • Gradle
  • Maven
  • Jenkins
  • IntelliJ IDEA
  • Eclipse
  • Spring

See all Concordion integrations →

Alternatives to Concordion

See all Concordion alternatives →

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Featured on iTechGuides

Featured on iTechGuides — Concordion 6.7/10

Concordion is listed in our BDD Testing Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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