Alexa can also provide you with information about the popularity of your own site or any other site that you search for.
That much, they offer for free. Alexa also offers professional products, such as a database of the top 10,000 websites, for a hefty but not necessarily unreasonable price.
How Alexa WorksAlexa gathers data by giving away the Alexa toolbar, free software that displays the rank of the website you're currently looking at and offers other useful and entertaining features. The Alexa toolbar software transmits information about the websites you are looking at to Alexa, allowing them to build their website rankings.
The Catch: No Methodology Is PerfectOf course, not everyone wants to run Alexa. And that does potentially bias their results. Also, the Alexa toolbar is only available for Windows Internet Explorer. Firefox users can obtain Alexa support through independently created plug-ins, but Mac users who prefer Safari seem to be out of luck at the moment.
Alternatives to Alexaranking.com offers a similar service based on data gathered by a product called BrowserAccelerator.
Got a LiveJournal account? Keep up with the latest articles in this FAQ by adding our syndicated feed to your friends list!