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Mockoon vs Imposter: catalog facts
Mockoon	Imposter
Freemium The desktop app and CLI are free and open source; Mockoon Cloud is a paid add-on.	Free Free and open source.
Windows, macOS, Linux, Command line	macOS, Linux, Self-hosted, Command line
No account or remote deployment needed Imports OpenAPI specifications	Creates mocks directly from OpenAPI and WSDL files Runs standalone, in Docker, on Lambda or inside tests
Focused on REST APIs Hosted deployments require the paid cloud service	Advanced plugins require JVM development Configured through files rather than a graphical interface
Downloadable app	Downloadable app, Self-hosted
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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