soapUI

vs

Postman

Apache JMeter is an open source software Java-based load testing tool for analyzing and measuring the performance of a variety of services and applications. Apache JMeter uses Swing graphical API which means that it is not implemented by platform-specific coding. Developer use Apache JMeter to test performance both on static and dynamic resources, and simulate a heavy load on a server, group of servers, network or objects to test its strength or to analyze overall performance of applications.

With Insomnia you can design, debug and deploy APIs. Insomnia is free API design platform and REST Client developed for macOS, Linux and Window. The application makes it easy to create and group requests, specify environment variables, authentication and generate code snippets. You can also get all the details on responses. View the whole request timeline, status codes, body, headers, cookies and much more. The software also makes it easy to orginize your projects with workspaces, folders, environments, drag-and-drop requests, and easily import and export your data. Insomnia integrates with API gateways such as the Kong API Gateway, and Kong for Kubernetes. While Insomnia comes with a free-forever license, the software provides premium monthly subscriptions for E2EE data sync and advanced collaboration features.

With Insomnia you can design, debug and deploy APIs. Insomnia is free API design platform and REST Client developed for macOS, Linux and Window. The application makes it easy to create and group requests, specify environment variables, authentication and generate code snippets. You can also get all the details on responses. View the whole request timeline, status codes, body, headers, cookies and much more. The software also makes it easy to orginize your projects with workspaces, folders, environments, drag-and-drop requests, and easily import and export your data. Insomnia integrates with API gateways such as the Kong API Gateway, and Kong for Kubernetes. While Insomnia comes with a free-forever license, the software provides premium monthly subscriptions for E2EE data sync and advanced collaboration features.

Developed by SmartBear Software, Swagger Inspector is an API testing tool that helps you design, develop and test web services. Whether its a REST, SOAP, or GraphQL, Swagger Inspector simplifies testing across your APIs. Inspector puts no limits to how you test, explore or generate your definitions from any form or type of API. The web-based software is released as a part of the Swagger eco-system which allow people to build self-documenting and well maintained APIs and web services.

HTTPie is a command-line HTTP client that makes it easy to interact and work with RESTful APIs. The CLI provided by HTTPie is designed to be as human-friendly as possible and is loved by developers creating services for the web. HTTPie can be used for testing, debugging, and generally interacting with  any API and HTTP server.