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Speedtest CLI vs Cloudflare Speed Test: catalog facts
Speedtest CLI	Cloudflare Speed Test
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	Reports jitter and packet loss as well as speed Quality scores for streaming, gaming and video calls
Closed source and licensed for non-commercial use by default Results depend on which Ookla server is selected	Your IP address is sent to Cloudflare Results reflect the path to Cloudflare's network only
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.