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Microcks vs Imposter: catalog facts
Microcks	Imposter
Free Free and open source.	Free Free and open source.
Self-hosted	macOS, Linux, Self-hosted, Command line
Mocks REST, gRPC, GraphQL and event-driven APIs Tests implementations against API contracts	Creates mocks directly from OpenAPI and WSDL files Runs standalone, in Docker, on Lambda or inside tests
Needs a server or cluster to run More setup than a desktop API client	Advanced plugins require JVM development Configured through files rather than a graphical interface
Self-hosted	Downloadable app, Self-hosted
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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