API Testing Tools: Which is Best?

Katalon Studio automates tests for web services, web applications, and mobile apps, and contains all frameworks, plugins, and ALM integrations in a single package for easy deployment.

Katalon Studio


As the most popular API testing tool, Postman has expanded its services to include native Windows and Mac versions, and is able to monitor APIs, automate tests, debug, and run requests.


SoapUI is popular tool for SOAP and REST testing, and its robust graphical user interface facilitates the creation and execution of automated functional, regression, and load tests.

Tricentis Tosca

As a software testing tool that supports HTTP, AMQP, SOAP, and many other protocols, Tricentis Tosca simplifies the integration of continuous testing into Agile and DevOps.


Apigee is a cross-cloud API tool offered by Google that allows its users to measure, test, build, and support APIs using other editors such as Swagger.


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