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MockoonMockServer
Freemium

The desktop app and CLI are free and open source; Mockoon Cloud is a paid add-on.

 Free

Free and open source with no SaaS account needed.

Windows, macOS, Linux, Command line Self-hosted, Command line
  • No account or remote deployment needed
  • Imports OpenAPI specifications
  • Mocks and proxies HTTP up to HTTP/3 plus gRPC
  • Records and replays real traffic
  • Focused on REST APIs
  • Hosted deployments require the paid cloud service
  • Aimed at developers and test setups rather than manual API exploration
  • Configuration takes some learning for complex scenarios
Downloadable app Downloadable app, Self-hosted
Open source Open source
License not stated License not stated
No account needed No account needed
Works offline Works offline

Checked September 23, 2026

Checked September 24, 2026

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