Mock Service Worker (MSW) vs Nock
No clear leader: Mock Service Worker (MSW) (60.5) and Nock (55.7) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.
Capabilities
Feature-by-feature on the axes that matter for api mocking. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Mock Service Worker (MSW)
An open-source API mocking library that uses the Service Worker API to intercept network requests in browsers and Node.js, enabling developers to mock REST, GraphQL, and WebSocket APIs for testing and development without modifying application code.
Nock
A Node.js library that intercepts HTTP requests in tests, allowing you to test modules that make HTTP calls in isolation without hitting real external services.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
Mock Service Worker (MSW)
- Vitest
- Playwright
- Storybook
- React Native
- Express
- fetch
- axios
- react-query
- Hono
- Fastify
Nock
Not documented yet.
Mock Service Worker (MSW) or Nock: which one depends on you
A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.
Free to run, no account needed to start. How the evaluation works
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.