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

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