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FAST.com vs nPerf: catalog facts
FAST.com	nPerf
Free Free to use in the browser.	Free The web speed test is free to run.
Web	Windows, macOS, Android, iOS, Web
Very simple, gives a download figure quickly Shows loaded and unloaded latency on request	Measures download, upload and latency Apps for mobile and desktop as well as the web
Upload and latency are hidden by default No jitter or packet loss measurement	Not open source Tests against nPerf's own servers only
Web application	Downloadable app, Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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