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Prism vs Microcks: catalog facts
Prism	Microcks
Free Free and open source.	Free Free and open source.
Command line	Self-hosted
Mock server generated directly from an OpenAPI file Validation proxy catches contract drift	Mocks REST, gRPC, GraphQL and event-driven APIs Tests implementations against API contracts
Depends on a complete, accurate specification Command-line only	Needs a server or cluster to run More setup than a desktop API client
Downloadable app	Self-hosted
Open source	Open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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