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GTmetrix vs Dotcom-Tools: catalog facts
GTmetrix	Dotcom-Tools
Freemium Free tests and a free account, with paid plans for more features.	Freemium The basic online tests are free; an account sign-up is offered for further features.
Web	Web
Test locations in 25 regions Configurable connection speed, user agent and cookies	Tests from nearly two dozen locations around the world Element-level waterfall chart for page speed
Many options and locations require an account or paid plan	Closed-source hosted service Some features are tied to an account sign-up
Web application, Hosted service	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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