Faker vs Mockoon

Free and open source

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

Free and open source. You pay in engineering time and CI minutes.

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

Everything, self-hosted

The desktop app and CLI are free and open source.

Category standard

OSS community · since 2010

Widely used

Mockoon · since 2017

• Realistic, locale-aware data catches layout bugs that 'test test test' never will.
• Seedable, so generated data is reproducible when a test fails.
• Available in every major language with a similar API.

• 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.

• Generated data has no referential integrity or business rules — that is your job.
• Random data makes failures harder to reproduce unless you seed deliberately.
• Not a substitute for production-shaped data at realistic volume.

• 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.

Every project that needs fixtures more realistic than placeholder strings.

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