ComScore Report: Fastest-Growing Sites And Top-Ten Advertising Magnets

Of the top 100 sites on the Web, which ones grew the fastest in 2008? In a report it is preparing to release tomorrow, The comScore 2008 Digital Year In Review (which you can sign up for here ), comScore ranks the 20 fastest-growing Web properties. These are out of the largest 100 sites overall. They are shown below, as measured by growth in unique visitors. (Interestingly, in a separate list of the ten largest sites, only eBay showed a decline from 2007). Most of the big gains among the fastest growers came because acquisitions ( CBS acquiring Cnet , Everyday Health acquiring Revolution Health and Drugstore.com, JPMorgan Chase acquiring Washington Mutual) or traffic and business partnerships (Break Media and Glam Media). If you strip out all of those, which denoted by asterisks, you get the sites that grew organically, including Infospace, Wordpress, Weatherbug, Answers.com Sites, Facebook, Hearst Digital Media, and Mozilla. Here is the full list by rank and annual growth rate (same as the first chart below)