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 Despite its recent growth, Act-On is still behind Nielsen NetRatings in all market share segments.

Websites Categories

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

2 Act-On is leading in Business Services, Insurance, Computer Hardware, Consumer Electronics and 12 other categories.


1 Nielsen NetRatings is leading in most countries, including Italy, United States, Bulgaria, Australia and 171 other countries.

2 Act-On is leading in Netherlands, British Indian Ocean Territory, Sudan, Seychelles and 13 other countries.