Market Share by Top Websites

1 Nielsen NetRatings is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Topsy is clearly lagging behind, losing to Nielsen NetRatings in all segments.

Websites Categories

1 Nielsen NetRatings has better usage coverage in more websites categories. Including Business & Industry, Marketing & Advertising, Arts & Entertainment, Food & Drink and 211 other categories.

2 Topsy is leading in Addictions, Alternative & Natural Medicine, Weight Loss, Crafts and 7 other categories.


1 Nielsen NetRatings is leading in most countries, including Italy, United States, Australia, Spain and 135 other countries.

2 Topsy is leading in Russia, Japan, Brazil, Ukraine and 14 other countries.