Karate is the only open-source tool to combine API test-automation, mocks, performance-testing and even UI automation into a single, unified framework. The BDD syntax popularized by Cucumber is language-neutral, and easy for even non-programmers.




SpecFlow is described as 'Aims at bridging the communication gap between domain experts and developers by binding business readable behavior specifications and examples to the underlying implementation' and is an app. There are four alternatives to SpecFlow for a variety of platforms, including Mac, Windows, Linux, BSD and Ruby apps. The best SpecFlow alternative is Karate, which is both free and Open Source. Other great apps like SpecFlow are Cucumber, Robot framework and JBehave.
Karate is the only open-source tool to combine API test-automation, mocks, performance-testing and even UI automation into a single, unified framework. The BDD syntax popularized by Cucumber is language-neutral, and easy for even non-programmers.




Cucumber is a tool that executes plain-text functional descriptions as automated tests. Collaboration tool for executable specifications which is based on "gherkin"-parser Gherkin is the language that Cucumber understand.

Robot Framework is a generic test automation framework for acceptance testing and acceptance test-driven development (ATDD). It has easy-to-use tabular test data syntax and it utilizes the keyword-driven testing approach.
