# Mock Service Worker (MSW) vs Mockoon

| Attribute | Mock Service Worker (MSW) | Mockoon |
|---|---|---|
| **vioscaleAI score** | 60.5 (79% (high)) | 65.1 (72% (medium)) |
| activity.commits_last_30d | 15 | - |
| adoption.dependent_repos | 11,851 | - |
| adoption.github_stars | 18,290 | - |
| content.faq | `[{"answer":"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. It is indexed under API Mocking.","source":"https://mswjs.io","question":"What is Mock Service Worker (MSW)?","confidence":0.6},{"answer":"Mock Service Worker (MSW) is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.","source":"https://mswjs.io","question":"Is Mock Service Worker (MSW) free to use?","confidence":0.6},{"answer":"Mock Service Worker (MSW) supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://mswjs.io","question":"What platforms does Mock Service Worker (MSW) support?","confidence":0.6},{"answer":"We have confirmed 8 integrations for Mock Service Worker (MSW), including Vitest, Playwright, Storybook, React Native, Express, fetch, axios and react-query. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://mswjs.io","question":"What does Mock Service Worker (MSW) integrate with?","confidence":0.6},{"answer":"Yes. Mock Service Worker (MSW) is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/mswjs/msw","question":"Is Mock Service Worker (MSW) open source?","confidence":0.95}]` | `[{"answer":"An open-source solution that allows developers to quickly set up mock API servers on their machines, supporting both desktop and command-line interfaces. Offers optional cloud-based features for team synchronization and coordinated testing across distributed teams. It is indexed under API Mocking.","source":"https://mockoon.com","question":"What is Mockoon?","confidence":0.6},{"answer":"Mockoon offers a free tier, so you can start without paying. Paid plans start at $100 per month. Pricing changes often, so verify at source before relying on it.","source":"https://mockoon.com/pricing/","question":"Is Mockoon free?","confidence":0.6},{"answer":"Mockoon supports Windows, macOS, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://mockoon.com","question":"What platforms does Mockoon support?","confidence":0.6},{"answer":"Yes. Mockoon can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://mockoon.com","question":"Can Mockoon be self-hosted?","confidence":0.6},{"answer":"We have confirmed 8 integrations for Mockoon, including OpenAPI, AWS Lambda, Google Cloud Functions, Firebase Functions, GitHub Actions, CircleCI, Travis CI and Docker. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://mockoon.com/pricing/","question":"What does Mockoon integrate with?","confidence":0.6},{"answer":"Mockoon is available worldwide. Its primary markets are the United States and the EU.","source":"https://mockoon.com/pricing/","question":"Where is Mockoon available?","confidence":0.75}]` |
| deployment.options | - | `{"cloud":true,"self_hosted":true}` |
| description.long | 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. | Mockoon provides a desktop application, CLI, and cloud service for creating and running mock REST APIs. It features request templating, OpenAPI support, HTTP proxying, and team collaboration capabilities for accelerated API development. |
| features.capabilities | `{"deployment":"embedded_library","open_source":true,"mocking_mode":"dynamic_templating","pricing_model":"open_source","market_segment":"dev-tool","openapi_import":true,"ci_cd_integration":true,"stateful_scenarios":true}` | `{"open_source":true,"mocking_mode":"dynamic_templating","pricing_model":"freemium","market_segment":"dev-tool","openapi_import":true,"ci_cd_integration":true,"proxy_passthrough":true,"collaboration_sharing":true}` |
| integrations.count | 8 | 8 |
| integrations.list | `[{"name":"Vitest"},{"name":"Playwright"},{"name":"Storybook"},{"name":"React Native"},{"name":"Express"},{"name":"fetch"},{"name":"axios"},{"name":"react-query"},{"name":"Hono","native":true},{"name":"Fastify","native":true}]` | `[{"name":"OpenAPI"},{"name":"AWS Lambda"},{"name":"Google Cloud Functions"},{"name":"Firebase Functions"},{"name":"GitHub Actions"},{"name":"CircleCI"},{"name":"Travis CI"},{"name":"Docker"}]` |
| language.primary | TypeScript | - |
| license.spdx | MIT | - |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"primaryMarkets":["US","EU"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"web":true}` | `{"cli":true,"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","summary":"Free and open source","freeTier":true,"sourceUrl":"https://mswjs.io","retrievedAt":"2026-10-14T21:33:51.343Z"}` | `{"type":"hybrid","plans":[{"free":false,"name":"Team","summary":"$100/month billed annually (saves 30% vs monthly)","features":["All open-source features (unlimited mocking, CLI, OpenAPI support, webhooks, serverless compatibility)","Cloud deployment and hosting","Web application access","Real-time team collaboration","Cloud data synchronization across devices","Team-level role-based access control","200 AI-generated endpoints per month per user","Next business day support","99.9% uptime SLA (target)","30-day audit trail retention"],"minSeats":5,"commitment":"annual","components":[{"kind":"fixed","amount":100,"period":"month","currency":"USD"}],"description":"For small teams and companies","contactSales":false,"includedLimits":{"api_mocks":"3","team_members":"5","monthly_calls":"100,000","api_mock_max_size":"30MB","request_rate_limit":"10 req/sec","ai_endpoints_per_month_per_user":"200"}},{"free":false,"name":"Enterprise","summary":"Custom pricing","features":["All Team plan features","Custom quotas and limits","Optional dedicated instances","Custom cloud region selection","Enterprise-grade support with custom SLA","Dedicated customer success manager","Custom payment options (PO and invoicing)","1-year audit trail retention"],"description":"For large teams and organizations with advanced needs","contactSales":true}],"summary":"Free open-source desktop and CLI. Team plan from $100/month (annual). Enterprise with custom pricing.","currency":"USD","freeTier":true,"sourceUrl":"https://mockoon.com/pricing/","retrievedAt":"2026-08-18T12:19:43.994Z","freeTrialDays":14,"startingPrice":{"amount":100,"period":"month","currency":"USD"},"billingPeriods":["month","year"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | freemium |
| pricing.price_level | free | low |
| pricing.transparent | yes | no |
| release.cadence_days | 2 | - |
| release.history | `[{"url":"https://github.com/mswjs/msw/releases/tag/v3.0.3","date":"2026-10-10T01:37:25Z","type":"stable","version":"v3.0.3"},{"url":"https://github.com/mswjs/msw/releases/tag/v3.0.2","date":"2026-10-03T01:30:56Z","type":"stable","version":"v3.0.2"},{"url":"https://github.com/mswjs/msw/releases/tag/v3.0.1","date":"2026-09-30T12:36:57Z","type":"stable","version":"v3.0.1"},{"url":"https://github.com/mswjs/msw/releases/tag/v3.0.0","date":"2026-09-28T15:40:54Z","type":"stable","version":"v3.0.0"},{"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"}]` | - |
| reliability.sla_pct | - | 99.9 |
| reliability.status_page | - | yes |
| security.disclosure_policy | - | yes |
| security.scorecard | 6.2 | - |
| security.trust_center | - | https://mockoon.com/blog/security-update-vulnerability-patched-v9-2-0/ |
| 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}` | - |

## Capabilities (API Mocking)

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

*Source: vioscaleAI. Generated 2026-10-16T20:03:13.085Z. "-" = undocumented, not absent.*