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Speedtest CLI vs OpenSpeedTest: catalog facts
Speedtest CLI	OpenSpeedTest
Free Free for personal, non-commercial use. Commercial use requires a licence.	Free Free to use. Self-hosting is available under its own licence terms.
Windows, macOS, Linux, Command line	Web, Self-hosted
Official client with results comparable to the web test JSON and CSV output suited to scheduled monitoring	Runs in any browser with no app or plugin Docker image makes internal LAN throughput testing trivial
Closed source and licensed for non-commercial use by default Results depend on which Ookla server is selected	Browser-based measurement caps out below what dedicated tools reach The hosted version's accuracy depends on server location
Downloadable app	Web application, Self-hosted
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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