API Mocking & Testing

SmartBear provides tools for testing, monitoring, and analyzing the quality and performance of software and APIs.

Tricentis provides AI-powered, end-to-end continuous testing solutions for enterprise applications, including extensive API testing capabilities.

ReadyAPI is an all-in-one platform for API quality, covering functional, security, and performance testing.

Parasoft Virtualize enables teams to create realistic virtual services for unavailable system dependencies.

Katalon Studio is a comprehensive test automation platform that supports API, web, mobile, and desktop testing.

Traffic Parrot offers API mocking, service virtualization, and performance testing tools for microservices.

APIMatic automates the generation of SDKs, API documentation, and transformation of API descriptions.

WireMock Cloud (formerly MockLab) provides a hosted and collaborative API mocking service based on WireMock.

WireMock is a flexible library for stubbing and mocking web services, with MockLab offering a cloud-hosted version for API mocking.

Hoppscotch is a lightweight, open-source API development ecosystem, offering an API client, testing, and mocking capabilities directly from the browser.

Microcks is an open-source mocking and testing platform for APIs and microservices, supporting OpenAPI, AsyncAPI, and Postman collections.

SoapUI is the world's leading open-source testing tool for SOAP and REST APIs.

Insomnia is a powerful open-source API client for REST, GraphQL, and gRPC, with features for API testing and development.