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sitespeed.io vs Unlighthouse: catalog facts
sitespeed.io	Unlighthouse
Free Free and open source with no sign-up.	Free Free and open source under the MIT licence, funded by sponsors.
Command line	Command line
Detailed reports with video, HAR waterfall and Core Web Vitals Scripting for multi-step user journeys	Audits a whole site rather than one page Automatic URL discovery and parallel scanning
Command-line setup takes more effort than an online checker Long-term dashboards need your own Graphite or InfluxDB and Grafana	Requires Node 22 or later Large sites still take time to scan
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT
No account needed	No account needed
Not stated if it works offline	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.