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MockServer vs Prism: catalog facts
MockServer	Prism
Free Free and open source with no SaaS account needed.	Free Free and open source.
Self-hosted, Command line	Command line
Mocks and proxies HTTP up to HTTP/3 plus gRPC Records and replays real traffic	Mock server generated directly from an OpenAPI file Validation proxy catches contract drift
Aimed at developers and test setups rather than manual API exploration Configuration takes some learning for complex scenarios	Depends on a complete, accurate specification Command-line only
Downloadable app, Self-hosted	Downloadable app
Open 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 September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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