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Speedtest CLI vs FAST.com: catalog facts
Speedtest CLI	FAST.com
Free Free for personal, non-commercial use. Commercial use requires a licence.	Free Free to use in the browser.
Windows, macOS, Linux, Command line	Web
Official client with results comparable to the web test JSON and CSV output suited to scheduled monitoring	Very simple, gives a download figure quickly Shows loaded and unloaded latency on request
Closed source and licensed for non-commercial use by default Results depend on which Ookla server is selected	Upload and latency are hidden by default No jitter or packet loss measurement
Downloadable app	Web application
Closed source	Closed 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	Needs internet
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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