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phpBB is leading in Top 1M Sites and The Entire Web.
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NationBuilder is leading in Top 10K Sites and Top 100K Sites.
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phpBB has better usage coverage in more websites categories. Including Computers Electronics & Technology, Games, Vehicles, Arts & Entertainment and 16 other categories.
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NationBuilder is leading in Law & Government, News & Media, Finance and Jobs & Career.
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phpBB is leading in most countries, including France, Russia, Germany, Poland and 113 other countries.
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NationBuilder is leading in United States, Canada, Australia, China and 25 other countries.