Mockoon vs Mock Service Worker
Feature checklists rarely decide anything. What decides it is the pricing metric, who has to write the tests, and which limitation you can live with.
Entry price
From $100 per month (Team, billed annually, up to 5 members)
Free tierFree and open source
Open sourceWhat drives the bill
The metric that actually scales your invoice.
Free locally and forever; the paid cloud tier adds hosted mocks and team sync. Team covers 5 members, 3 cloud-deployed mocks and 100k calls a month, with Enterprise on a quote. Work emails get a 14-day trial, others 7 days with a card.
Free and open source. You pay in engineering time and CI minutes.
Free tier
The desktop app and CLI are free and open source.
Everything, self-hosted
Open source
MIT
MIT
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Widely used
Mockoon · since 2017
Category standard
OSS community · since 2020
Strengths
- Genuinely a minute from download to a working mock API.
- Dynamic templating with faker-style helpers produces realistic responses.
- Proxy mode mocks only the routes you need and passes the rest through.
- One set of handlers reused across unit, component, E2E and local development.
- Application code is completely unaware it is being mocked — no test-only branches.
- Supports REST and GraphQL with the same model.
Limitations
- Desktop-first; sharing mocks across a team needs the paid cloud or a committed config file.
- HTTP only.
- Less suited to complex stateful behaviour than WireMock.
- JavaScript ecosystem only.
- Service Worker registration adds a setup step and occasional caching confusion.
- Handlers can drift from the real API without contract verification.
Best for
Front-end developers unblocking themselves while a backend is still being built.
Front-end teams that want one mocking approach across every kind of test.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.