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Concordion vs Karate

Both stand on bdd testing tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Concordion

Free plan LinuxMacSelf-hosted+1

Concordion connects executable specifications with generated documentation and supports several Java and C# workflows. Teams using Jenkins reports should account for the documented Content Security Policy issue.

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Karate

Free plan Open source APIExtensionLinux+3

Karate offers a free framework spanning API, UI, mock, and performance testing, with paid plans for additional IDE and client features. The production CI/CD license condition for async protocols matters for teams evaluating Kafka, gRPC, or WebSocket testing.

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The facts

ConcordionKarate
Free planYesYes
Open sourceNot publishedYes
Runs onLinux, Mac, Self-hosted, WindowsAPI, Extension, Linux, Mac, Self-hosted, Windows
Lowest paid planFree or on requestIDE Plus: $100 per user a year
Plans published15
MakerNot publishedNot published
Websiteconcordion.orgkaratelabs.io
On bdd testing tools#3 of 30#1 of 30

Concordion: what it does well

  • Generates documentation when executable checks run.
  • Shows expected and actual values for failed assertions.
  • Supports Java and C# options.
  • Integrates with IntelliJ IDEA, Eclipse, Gradle, Maven, and Jenkins.
  • Apache License 2.0 open-source tool.

What to know first

  • Eclipse plugin supports HTML, but not Markdown.
  • Jenkins security defaults can block report styles and scripts.
  • Java concordion:run with JUnit 4 fixtures also needs JUnit Vintage.
  • Maintained by volunteers.

Karate: what it does well

  • Free MIT-licensed framework for commercial projects
  • Supports REST, GraphQL, and SOAP testing
  • Combines UI and API steps in tests
  • API tests can be reused for performance testing
  • Products run locally or in customer infrastructure

What to know first

  • Free tier includes community support
  • IDE Plus costs $100 a year
  • Pro costs $640 a year
  • Production CI/CD async testing requires an Enterprise runtime license

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