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Speedtest vs FAST.com: catalog facts
Speedtest	FAST.com
Free Free and open source under the GPL-3.0-or-later licence.	Free Free to use in the browser.
Linux	Web
Native GTK4 and libadwaita interface Uses open LibreSpeed servers rather than a commercial service	Very simple, gives a download figure quickly Shows loaded and unloaded latency on request
Linux only Small project with a narrow feature set	Upload and latency are hidden by default No jitter or packet loss measurement
Downloadable app	Web application
Open source	Closed source
License: GPL-3.0-or-later	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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