Compare two sites

Enter two URLs and get both temperatures side by side, scored on exactly the same signals on the same afternoon. The gap between them is the useful number, not either one on its own.

This is the version of the tool people actually use. Almost nobody wants to know their own temperature in isolation. They want to know whether the site beating them is beating them on something fixable, and a single reading cannot answer that.

How to read a gap

A gap between two temperatures is made of specific missing signals, not of effort or budget. That is the useful thing about measuring both sides on the same 37 signals: the difference is enumerable. When a competitor reads 14 degrees warmer, there is a list of exactly what they have that you do not, and it is usually shorter than anyone expects.

It also cuts the other way. Sites that are beating you in results while reading colder than you are telling you something important, which is that whatever is separating you is not observable from the page. That is a content, demand or link problem, and no amount of technical work will close it.

Fair comparisons

• Compare like with like. A homepage against an article is not a comparison, it is two different jobs.
• Compare the page that is actually competing, not the page you wish were competing.
• Take both readings on the same day. Response time moves, and it is worth 8 points inside the technical reading.
• Two readings count against the same hourly limit as two separate reads, because they are.

Want the full picture for one of them rather than the headline? Take a single reading, or ask for the diagnostic, which covers the site rather than the page.