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Topsy is leading in Top 1M Sites.
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Open Web Analytics is leading in Top 100K Sites.
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Topsy has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, News & Media, Science & Education and 12 other categories.
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Open Web Analytics is leading in Reference Materials, E-commerce & Shopping, Vehicles and Sports.
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Topsy is leading in most countries, including Japan, United States, Russia, Brazil and 36 other countries.
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Open Web Analytics is leading in Austria, Germany, Greece and Slovenia.