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ImposterWireMock
Free

Free and open source.

 Freemium

The core engine is free and open source; WireMock Cloud has a free tier and paid plans.

macOS, Linux, Self-hosted, Command line Web, Self-hosted, Command line
  • Creates mocks directly from OpenAPI and WSDL files
  • Runs standalone, in Docker, on Lambda or inside tests
  • Flexible request matching and response templating
  • Record and playback of real service traffic
  • Advanced plugins require JVM development
  • Configured through files rather than a graphical interface
  • Standalone mode needs Java or Docker
  • Collaboration features are in the paid cloud product
Downloadable app, Self-hosted Downloadable app, Self-hosted, Hosted service
Closed source Open source
License not stated License not stated
No account needed No account needed
Works offline Works offline

Checked October 2, 2026

Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.