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Moco vs MockServer: catalog facts
Moco	MockServer
Free Free and open source under the MIT license.	Free Free and open source with no SaaS account needed.
Command line	Self-hosted, Command line
Runs a configurable stub server Supports HTTP, REST, WebSocket, and server-sent events	Mocks and proxies HTTP up to HTTP/3 plus gRPC Records and replays real traffic
Requires Java 17 or later	Aimed at developers and test setups rather than manual API exploration Configuration takes some learning for complex scenarios
Downloadable app	Downloadable app, Self-hosted
Open source	Open source
License: MIT	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 8, 2026	Official website Full listing and sources Checked September 24, 2026

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