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While some put a lot of stock into websites such as these, I would encourage you to not do so. As they may offer one point of reference to figure out the worth of a website you own, are selling, or would like to buy, they should just be one of many other statistical references to gather data from. If nothing else, they offer a form of entertainment, and you can grab a nifty website badge from some of them to impress your friends and co-workers.

Google Analytics alternatives by SEO Capo, answering what are the best free and paid Google Analytics alternatives and are there any open source website analytics tools worth trying out