I occasionally cite web traffic stats from Alexa and Compete, two services that measure traffic across the entire web. It's probably worth pointing out that I have no idea at all whether they're accurate. Compete publishes a monthly count of site visitors based on data from two million U.S. Internet users, so I can compare its numbers directly to the stats I get from Google Analytics. Since the latter is based on actual traffic, it's a reliable metric.

For the Drudge Retort, Google Analytics reports 337,985 U.S. visitors in September and Compete reports 42,815 people for the same period (12.7 percent of Google's total).

On SportsFilter, Google Analytics reports 263,677 visitors and Compete reports 67,906 people (25.8 percent).

On the soon-to-close Cruel.Com, Google Analytics reports 109,334 visitors and Compete 22,028 people (20.1 percent).

I wouldn't expect these numbers to be the same, because every web stats program has different methodology for counting eyeballs. But if Compete was measuring my U.S. traffic accurately, I'd expect the percentages to be close. They're all over the place.

-- Rogers Cadenhead

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You should also check out Quantcast. If you sign up to become "quantified" and put some Javascript, on your site, they give about the same numbers as Google Analytics, plus some demographics.

For our site, Alexa seems to bear no relation to reality (the reality of our log files). Compete seems to follow our ups and downs pretty accurately, although it's only updated every month. The absolute numbers aren't accurate (use Google Analytics or Quantcast for that), but the trend is right. Quantcast without the Javascript underestimates by a factor of four or so.

Compete has a new for-fee service called Search Analytics that looks to be a really nice tool for competitive SEO.

Quantcast is excellent if you've graduated from CPA/CPC affiliate income and are selling CPM or sponsorship ads directly: it gives you the demographics that ad agencies want to see, for free.


 

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