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