WireMock vs Mockoon

Free tier available

From $9 per user/month (indicative, Cloud)

Open source is free; WireMock Cloud is a paid hosted service for shared team mocks.

Free locally; the paid cloud tier adds hosted mocks and team sync.

Open-source WireMock is complete and free.

The desktop app and CLI are free and open source.

Category standard

WireMock Inc. · since 2013

Widely used

Mockoon · since 2017

• Fault and latency injection lets you test the error paths that never occur on demand in a real sandbox.
• Record-and-replay produces a realistic mock from live traffic quickly.
• Runs anywhere: embedded, standalone, container or cloud.

• 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.

• Recorded stubs drift from the real service unless you re-record or verify contracts.
• Complex stateful scenarios get verbose in JSON.
• HTTP only — not for message queues or gRPC without extensions.

• 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.

Teams whose integration tests depend on third-party HTTP services.

Front-end developers unblocking themselves while a backend is still being built.