Market Share by Top Websites

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

2 In terms of market share, Ad Butler is clearly lagging behind, losing to Mediaplex in all segments.

Websites Categories

1 Mediaplex has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, Business & Industry, Shopping and 210 other categories.

2 Ad Butler is leading in Energy, College & University Press, Camps and Womens Health.


1 Mediaplex is leading in most countries, including United States, United Kingdom, Germany, France and 119 other countries.

2 Ad Butler is leading in Belarus, Jordan, Uzbekistan, Bermuda and 4 other countries.