Alexa’s Data Accuracy

The following chart shows the accuracy of Alexa traffic stats for websites over time:

As you can see, not only is Alexa much more inaccurate than others, their accuracy is also going down over time, and currently at just 12% overall.

Note that above statistic uses gut feeling from a selected sample group (me) as data source. I might switch to the Blogoscoped toolbar as data source in the next release, though I haven’t yet decided which is more reliable.

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