Best API Testing Tool

BlazeMeter is a cloud-based API testing tool that integrates seamlessly with JMeter. It offers distributed load testing, continuous integration support, and detailed analytics. Suitable for teams look...

Apache JMeter is the venerable, open-source standard for performance and load testing, with robust capabilities for functional API testing. Originally designed for web applications, it supports a wide...

API Fortress is an API testing tool that focuses on security and performance. It offers automated testing, continuous delivery support, and comprehensive security features. Best suited for teams prior...

Insomnia is a powerful, elegant, and open-source API client that has gained a strong following as a streamlined alternative to Postman. Acquired by Kong Inc., it focuses on a superb developer experien...

TestProject is a cloud-based API testing tool that supports continuous integration and cross-platform testing. It offers a free tier, making it accessible for small teams or individuals. Suitable for...

Karate DSL is a unique open-source tool that combines API test automation, performance testing, mocks, and even UI automation into a single, cohesive framework. Its most notable feature is that it all...

ReadyAPI, built on the legacy of SoapUI Open Source, is a comprehensive, enterprise-grade functional API testing platform from SmartBear. It is designed for serious test automation, supporting REST, S...

Tricentis Tosca is a leading enterprise continuous testing platform that employs a unique model-based approach to test automation. Its API testing capabilities are part of its broader suite for end-to...

Gatling is a powerful, open-source API testing tool built on Scala. It offers advanced load testing capabilities and detailed reporting features. Ideal for developers and teams familiar with Scala who...

k6, from Grafana Labs, is a modern, developer-centric, open-source load testing tool built for the cloud-native era. It is designed specifically for testing the performance and reliability of APIs, mi...

Katalon Studio is a versatile, low-code automation platform that powerfully integrates API, Web, and Mobile testing into a single environment. It lowers the barrier to entry for test automation with i...

Testim.io is an AI-driven API and UI testing tool that supports cross-platform testing and continuous delivery. It offers easy-to-use automation features and integrates well with popular CI/CD pipelin...

REST Assured is the de facto standard Java domain-specific language (DSL) for testing RESTful APIs. It simplifies testing of REST-based services by allowing you to write tests in a given-when-then sty...

SoapUI Open Source is the free, community edition of the tool that evolved into ReadyAPI. It remains a powerful, standalone tool for functional and load testing of SOAP and REST APIs. It provides a co...

ZAP is an open-source API testing tool that focuses on security and ethical hacking. It offers advanced scanning features, detailed reports, and a user-friendly interface. Best suited for teams priori...

Hoppscotch (formerly Postwoman) is a lightweight, open-source, web-based API client built as a Progressive Web App (PWA). It emphasizes speed, simplicity, and privacy by running directly in your brows...

LoadRunner Cloud is a cloud-based API testing tool that offers distributed load testing and real-time performance monitoring. It integrates seamlessly with Micro Focus' LoadRunner platform, providing...

For Python-centric teams, combining the popular `pytest` testing framework with the `requests` library is a powerful, lightweight, and highly customizable approach to API testing. This is not a dedica...

Testim Pro is a commercial version of Testim.io, offering advanced AI-driven API and UI testing features. It supports cross-platform testing and integrates well with CI/CD pipelines. Best suited for t...