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EchoAPI vs TestMace: catalog facts
EchoAPI	TestMace
Freemium Usable without an account, with paid plans listed on the pricing page.	Free Distributed as freeware.
Command line	Windows, macOS, Linux, Command line
Works without logging in and offline Runs Postman scripts	Graphical test editor alongside JavaScript tests Variables, authentication and API import
Closed source Some features are tied to paid plans	Closed source The site gives no release dates or changelog
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License: Freeware
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 23, 2026	Official website Full listing and sources Checked October 2, 2026

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