4
Microcks
Microcks is a free, open-source tool for mocking and testing APIs and microservices.
Free planWebAPIExtensionLinux
7.2Free plan
Visit
5
MockAPI
MockAPI helps users create REST API endpoints, generate custom data, and interact with it through a RESTful interface.
Free planWebAPI
7.2From $35 a year
Visit
6
Knockout API
Knockout API provides image and video processing through a browser app and API.
Free planWebAPI
7.0From $10 a month
Visit
7
Mockoon
Mockoon is a free, open-source tool for designing and running mock APIs locally.
WebAPILinuxmacOS
6.8From €10 a month
Visit
8
Hoverfly
Hoverfly Cloud is a hosted API simulation and mocking service for development and testing that should not rely on live API dependencies.
WebAPILinuxmacOS
6.7From $10 a month
Visit
9
MockServer
MockServer is free, self-hosted software for mocking and proxying HTTP, HTTPS, and gRPC services in isolated, deterministic testing.
Free planWebAPILinuxmacOS
6.6Free plan
Visit
10
moqapi.dev
moqapi.dev is a web and API platform for creating live mock endpoints from API specifications.
Free planWebAPI
6.6From $29 a month
Visit
11
Mockttp
Mockttp is an open-source JavaScript library for intercepting, transforming, and testing HTTP requests and responses.
Free planWebLinuxmacOSSelf-hosted
6.5Free plan
Visit
12
WireMock
WireMock Cloud creates simulated API environments for development, testing, and AI coding workflows.
Free planWebAPILinuxmacOS
6.5Free plan
Visit
13
MockWebServer
MockWebServer is a free, open-source test library for developers checking HTTP, HTTPS, or HTTP/2 clients.
Free planAndroid
6.4Free plan
Visit
14
WireMock
WireMock simulates APIs and software dependencies, letting teams test without relying on those services, explore edge cases, and develop dependent features in parallel.
Free planWebAPILinuxSelf-hosted
6.4Free plan
Visit
15
Stoplight Prism
Stoplight Prism is a free, open-source command-line HTTP server for turning OpenAPI descriptions or Postman Collections into mock API servers.
Free planWebAPISelf-hosted
6.3Free plan
Visit
16
Mocki
WebAPISelf-hosted
6.1From $15 a month
Visit
17
json-server
json-server creates a fake REST API without coding, for testing and prototyping.
Free planAPISelf-hosted
5.7Free plan
Visit
18
OpenAPI Mock
OpenAPI Mock is a free, open-source API mock server that generates response data from OpenAPI specifications.
LinuxSelf-hostedWindows
5.6
Visit
19
Mirage JS
Mirage JS is a free, open-source JavaScript library for mocking backend APIs during frontend development and testing.
Web
5.5
Visit
20
Mock Service Worker
Mock Service Worker (MSW) is a free, open-source API mocking library for browser and Node.js applications.
WebSelf-hosted
5.5
Visit
21
OpenAPI Server
OpenAPI Server is a local mock server for API development and end-to-end testing.
APISelf-hosted
5.5
Visit
22
Pretender.js
Pretender.js is a free, open-source mock server library for XMLHttpRequest and Fetch in the browser.
Web
5.5
Visit
23
MockPilot
Extension
5.3
Visit
24
Parasoft Virtualize
WebLinuxmacOSWindows
5.3
Visit
25
API-Mocked
API-Mocked is a free, open-source, self-hosted server for mocking APIs and serving known content, usually static.
Self-hosted
5.2
Visit

Back to Imposter