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sitespeed.io vs Lighthouse: catalog facts
sitespeed.io	Lighthouse
Free Free and open source with no sign-up.	Free The open-source tool is available without a license fee.
Command line	Windows, macOS, Linux, Web, Command line
Detailed reports with video, HAR waterfall and Core Web Vitals Scripting for multi-step user journeys	Turns vague performance complaints into a specific, prioritised list Runs in CI as well as in the browser, so regressions can be caught
Command-line setup takes more effort than an online checker Long-term dashboards need your own Graphite or InfluxDB and Grafana	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
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: Apache-2.0
No account needed	Not stated if an account is 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 22, 2026

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