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Lighthouse vs sitespeed.io: catalog facts
Lighthouse	sitespeed.io
Free The open-source tool is available without a license fee.	Free Free and open source with no sign-up.
Windows, macOS, Linux, Web, Command line	Command line
Turns vague performance complaints into a specific, prioritised list Runs in CI as well as in the browser, so regressions can be caught	Detailed reports with video, HAR waterfall and Core Web Vitals Scripting for multi-step user journeys
Scores vary between runs and depend heavily on the machine and network A good score is not the same as a fast experience for real users	Command-line setup takes more effort than an online checker Long-term dashboards need your own Graphite or InfluxDB and Grafana
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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