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Speedtest CLI vs speedtest-go: catalog facts
Speedtest CLI	speedtest-go
Free Free for personal, non-commercial use. Commercial use requires a licence.	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Command line	Windows, Command line
Official client with results comparable to the web test JSON and CSV output suited to scheduled monitoring	Faster test runs than the speedtest.net website Usable as a Go library as well as a CLI
Closed source and licensed for non-commercial use by default Results depend on which Ookla server is selected	Depends on speedtest.net servers No graphical interface
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account 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 October 2, 2026

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