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PageSpeed Insights vs WebPageTest: catalog facts
PageSpeed Insights	WebPageTest
Free Free to use.	Freemium Basic tests are free, with paid options available.
Web	Web
Field and lab data side by side Separate mobile and desktop results	Detailed request waterfall and filmstrip view Tests from multiple locations
Field data only appears for URLs with enough Chrome traffic Single-page checks rather than ongoing monitoring	Output is detailed and assumes some performance knowledge Some features sit behind paid plans
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	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.