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, Act-On 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, Marketing & Advertising, People & Society and 210 other categories.

2 Act-On is leading in Business Services, Insurance, Computer Hardware, Consumer Electronics and 11 other categories.


1 Nielsen NetRatings is leading in most countries, including Italy, United States, Bulgaria, Australia and 172 other countries.

2 Act-On is leading in British Indian Ocean Territory, Seychelles, Mozambique, Angola and 14 other countries.