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, Optimost 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, Arts & Entertainment, News & Media, People & Society and 202 other categories.

2 Optimost is leading in Insurance, Office Products and Flowers.


1 Nielsen NetRatings is leading in most countries, including Italy, United States, Russia, Australia and 181 other countries.

2 Optimost hasn't got a lead over Nielsen NetRatings in any country.