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WebPageTest vs GTmetrix: catalog facts
WebPageTest	GTmetrix
Freemium Basic tests are free, with paid options available.	Freemium Free tests and a free account, with paid plans for more features.
Web	Web
Detailed request waterfall and filmstrip view Tests from multiple locations	Test locations in 25 regions Configurable connection speed, user agent and cookies
Output is detailed and assumes some performance knowledge Some features sit behind paid plans	Many options and locations require an account or paid plan
Web application	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Not stated if an account is 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.