Compare software

Imposter vs Prism: catalog facts
Imposter	Prism
Free Free and open source.	Free Free and open source.
macOS, Linux, Self-hosted, Command line	Command line
Creates mocks directly from OpenAPI and WSDL files Runs standalone, in Docker, on Lambda or inside tests	Mock server generated directly from an OpenAPI file Validation proxy catches contract drift
Advanced plugins require JVM development Configured through files rather than a graphical interface	Depends on a complete, accurate specification Command-line only
Downloadable app, Self-hosted	Downloadable app
Closed source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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