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MockServer vs Moco: catalog facts
MockServer	Moco
Free Free and open source with no SaaS account needed.	Free Free and open source under the MIT license.
Self-hosted, Command line	Command line
Mocks and proxies HTTP up to HTTP/3 plus gRPC Records and replays real traffic	Runs a configurable stub server Supports HTTP, REST, WebSocket, and server-sent events
Aimed at developers and test setups rather than manual API exploration Configuration takes some learning for complex scenarios	Requires Java 17 or later
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License not stated	License: MIT
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 8, 2026

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