Market Share by Top Websites

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

2 Despite its recent growth, GroupM Server is still behind AdReactor in all market share segments.

Websites Categories

1 GroupM Server has better usage coverage in more websites categories. Including People & Society, Business & Industry, Autos & Vehicles, News & Media and 41 other categories.

2 AdReactor is leading in Arts & Entertainment, Music & Audio, Internet & Telecom, Movies and 30 other categories.


1 AdReactor is leading in most countries, including Indonesia, India, United States, Brazil and 57 other countries.

2 GroupM Server is leading in Poland, Germany, Denmark, Austria and 12 other countries.