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KeyCDN Website Speed Test vs sitespeed.io: catalog facts
KeyCDN Website Speed Test	sitespeed.io
Free Free to use.	Free Free and open source with no sign-up.
Web	Command line
Full waterfall with per-asset timings and headers Choice of 10 test locations	Detailed reports with video, HAR waterfall and Core Web Vitals Scripting for multi-step user journeys
One location per test run Fewer metrics than dedicated performance suites	Command-line setup takes more effort than an online checker Long-term dashboards need your own Graphite or InfluxDB and Grafana
Web application	Downloadable app
Closed source	Open source
License not stated	License not stated
No account needed	No account needed
Needs internet	Not stated if it works offline
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.