# Mock Service Worker (MSW) vs Nock

| Attribute | Mock Service Worker (MSW) | Nock |
|---|---|---|
| **Vioscale score** | 58.1 (81% (high)) | 62.8 (43% (low)) |
| activity.commits_last_30d | - | 1 |
| adoption.dependent_repos | 11,851 | 130,286 |
| adoption.github_stars | 18,168 | 13,120 |
| description.long | An API mocking library that intercepts network requests at the browser and Node.js levels, allowing consistent mock responses across testing frameworks, tools, and applications without requiring client-specific stubs or configuration. | An open-source library that allows developers to test modules making HTTP requests without external dependencies by mocking server responses. |
| integrations.count | 8 | - |
| integrations.list | `[{"name":"Vitest"},{"name":"Playwright"},{"name":"Storybook"},{"name":"React Native"},{"name":"Express"},{"name":"fetch"},{"name":"axios"},{"name":"react-query"}]` | - |
| language.primary | TypeScript | JavaScript |
| license.spdx | MIT | MIT |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"cli":true,"web":true}` | - |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://mswjs.io","retrievedAt":"2026-08-17T21:32:17.412Z"}` | `{"type":"open_source","sourceUrl":"https://github.com/pricing","retrievedAt":"2026-08-17T21:34:27.505Z"}` |
| pricing.free_tier | yes | - |
| pricing.model | commercial | commercial |
| pricing.price_level | free | free |
| release.cadence_days | 2 | 9 |
| release.history | `[{"url":"https://github.com/mswjs/msw/releases/tag/v2.15.0","date":"2026-07-08T01:43:13Z","type":"stable","version":"v2.15.0"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.14.7","date":"2026-07-07T18:24:49Z","type":"stable","version":"v2.14.7"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.14.6","date":"2026-05-11T09:41:54Z","type":"stable","version":"v2.14.6"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.14.5","date":"2026-05-08T01:51:55Z","type":"stable","version":"v2.14.5"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.14.4","date":"2026-05-07T12:26:03Z","type":"stable","version":"v2.14.4"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.14.3","date":"2026-05-04T17:14:11Z","type":"stable","version":"v2.14.3"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.14.2","date":"2026-04-29T15:37:39Z","type":"stable","version":"v2.14.2"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.14.1","date":"2026-04-29T15:11:07Z","type":"stable","version":"v2.14.1"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.14.0","date":"2026-04-29T14:12:53Z","type":"stable","version":"v2.14.0"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.13.6","date":"2026-04-24T15:53:44Z","type":"stable","version":"v2.13.6"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.13.5","date":"2026-04-23T01:46:05Z","type":"stable","version":"v2.13.5"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.13.4","date":"2026-04-16T16:25:47Z","type":"stable","version":"v2.13.4"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.13.3","date":"2026-04-14T01:44:10Z","type":"stable","version":"v2.13.3"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.13.2","date":"2026-04-08T11:18:18Z","type":"stable","version":"v2.13.2"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.13.1","date":"2026-04-07T18:14:15Z","type":"stable","version":"v2.13.1"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.13.0","date":"2026-04-06T12:37:48Z","type":"stable","version":"v2.13.0"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.12.14","date":"2026-03-21T01:42:04Z","type":"stable","version":"v2.12.14"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.12.13","date":"2026-03-17T11:36:51Z","type":"stable","version":"v2.12.13"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.12.12","date":"2026-03-17T01:42:36Z","type":"stable","version":"v2.12.12"},{"url":"https://github.com/mswjs/msw/releases/tag/v2.12.11","date":"2026-03-15T19:07:45Z","type":"stable","version":"v2.12.11"}]` | `[{"url":"https://github.com/nock/nock/releases/tag/v14.0.17","date":"2026-07-30T18:31:48Z","type":"stable","version":"v14.0.17"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.14","date":"2026-07-22T20:30:03Z","type":"prerelease","version":"v15.0.0-beta.14"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.13","date":"2026-07-22T20:25:54Z","type":"prerelease","version":"v15.0.0-beta.13"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.16","date":"2026-06-26T07:56:17Z","type":"stable","version":"v14.0.16"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.12","date":"2026-05-13T17:49:47Z","type":"prerelease","version":"v15.0.0-beta.12"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.11","date":"2026-05-07T19:33:41Z","type":"prerelease","version":"v15.0.0-beta.11"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.15","date":"2026-05-07T14:32:05Z","type":"stable","version":"v14.0.15"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.14","date":"2026-04-30T19:55:09Z","type":"stable","version":"v14.0.14"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.13","date":"2026-04-20T20:49:07Z","type":"stable","version":"v14.0.13"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.12","date":"2026-04-05T20:18:44Z","type":"stable","version":"v14.0.12"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.10","date":"2026-02-27T11:45:30Z","type":"prerelease","version":"v15.0.0-beta.10"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.9","date":"2026-02-14T22:32:01Z","type":"prerelease","version":"v15.0.0-beta.9"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.8","date":"2026-02-09T20:35:05Z","type":"prerelease","version":"v15.0.0-beta.8"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.11","date":"2026-02-09T19:51:20Z","type":"stable","version":"v14.0.11"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.7","date":"2025-11-29T20:46:37Z","type":"prerelease","version":"v15.0.0-beta.7"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0","date":"2025-09-29T21:26:04Z","type":"prerelease","version":"v15.0.0"},{"url":"https://github.com/nock/nock/releases/tag/v15.0.0-beta.6","date":"2025-08-26T19:32:51Z","type":"prerelease","version":"v15.0.0-beta.6"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.10","date":"2025-08-12T15:45:02Z","type":"stable","version":"v14.0.10"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.9","date":"2025-08-07T16:55:41Z","type":"stable","version":"v14.0.9"},{"url":"https://github.com/nock/nock/releases/tag/v14.0.8","date":"2025-08-01T06:24:34Z","type":"stable","version":"v14.0.8"}]` |
| security.scorecard | 6.2 | 5.3 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=msw&per_page=100","last_12m":0,"max_severity":null}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=nock&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (API Mocking)

| Capability | Mock Service Worker (MSW) | Nock |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Mocking mode | - | - |
| Stateful scenarios | - | - |
| Fault chaos injection | - | - |
| Openapi import | - | - |
| Proxy passthrough | - | - |
| Admin API | - | - |
| Deployment | - | - |
| Legacy protocol virtualization | - | - |
| Collaboration sharing | - | - |
| Ci cd integration | - | - |
| Open source | - | - |
| Market segment | - | - |
| Pricing model | - | - |

*Source: Vioscale. Generated 2026-09-01T17:01:26.203Z. "-" = undocumented, not absent.*