Side by side
Mirage JS vs WireMock
Both stand on api mocking tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan Web
Mirage JS offers a configurable way to simulate API behavior in browser-based development and testing. Its Node runtime boundary matters for teams that need to mock server-side requests.
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Free plan APILinuxSelf-hosted+1
WireMock offers request matching, response simulation, and replay for testing against simulated dependencies. The free tier has defined user, API, and call limits, and mocks pause after quota exhaustion.
Visit WireMockThe facts
| Mirage JS | WireMock | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Web | API, Linux, Self-hosted, Web |
| Lowest paid plan | Not published | Free or on request |
| Plans published | None | 2 |
| Maker | Not published | Not published |
| Website | miragejs.com | wiremock.org |
| On api mocking tools | #17 of 26 | #13 of 26 |
Mirage JS: what it does well
- Intercepts XMLHttpRequest and fetch requests
- Supports REST and GraphQL
- Creates mock records with an in-memory database and factories
- Handles custom errors and simulated response timing
- Provides npm and Yarn installation guidance
What to know first
- Node use requires a browser-like environment such as jsdom
- Cannot mock a React app’s server-side API requests
WireMock: what it does well
- Matches requests across URLs, headers, cookies, and bodies.
- Can record and replay service interactions.
- Supports JUnit and other testing frameworks.
- Free plan includes 1,000 calls per month.
What to know first
- Free plan is limited to one user.
- Free plan allows three mock APIs.
- Free and trial plans have rate limits.
- Mocks stop after the quota is exceeded.
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