Kat alternatives

Postman is the world’s leading API platform, used by more than 30 million developers and 500,000 organizations worldwide for building and managing APIs. Postman enables teams to efficiently collaborate at every stage of the API lifecycle while prioritizing quality, performance, and security.

Paw is a full-featured and beautifully designed Mac app that makes interaction with REST services delightful.Whether you are an API maker or consumer, Paw helps you build HTTP requests, inspect the server's response and even generate client code.

Stackprint is a web platform to quickly build REST APIs without having to write any code yourself. Define the resources that your API should manage and Stackprint deploys your REST API with one click.

req is a lightweight, minimal yet powerful HTTP client / API testing tool designed for speed. Made in Node.js and based onhttp files, req gives you an easy-to-use yet powerful interface.

HammerUI is a simple REST API client created in JavaFX. It can be used as a testing tool and also contains command line client for CI/CD integration.

Continuous Integration platform, that lets you test, monitor and secure your APIs

Mayhem was purpose-built to cut through the noise of traditional application security. Combining techniques used by attackers with generative AI, Mayhem tries to break your applications thousands of times every minute so you can find and fix the risks that matter most.