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testcritic

Mockoon vs Tonic.ai

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 tier

Quote on request

Quote only

What 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.

Enterprise quote-based pricing by data volume and connected databases.

Free tier

The desktop app and CLI are free and open source.

Free trial.

Open source

MIT

Self-hostable

No-code authoring

Languages

JavaScriptCodeless
CodelessPython

Platforms

API
API

Fits teams

Solo / side projectStartupScale-up / mid-market
Scale-up / mid-marketEnterprise

Adoption

Widely used

Mockoon · since 2017

Established

Tonic.ai · since 2018

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.
  • Preserves referential integrity and statistical distribution, so applications behave as they do in production.
  • Directly addresses the GDPR and HIPAA exposure created by production data in lower environments.
  • Subsetting produces a small but coherent slice rather than a full copy.

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.
  • Expensive, with enterprise-only pricing.
  • Initial configuration of sensitive-field classification takes real effort.
  • Adds a pipeline stage that must be maintained as the schema evolves.

Best for

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

Organisations that currently copy production data into staging and know they should stop.

Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.