Market Share by Top Websites

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

2 In terms of market share, GroupM Server is clearly lagging behind, losing to AdReactor in all segments.

Websites Categories

1 AdReactor has better usage coverage in more websites categories. Including Arts & Entertainment, Music & Audio, Internet & Telecom, Business & Industry and 50 other categories.

2 GroupM Server is leading in People & Society, Autos & Vehicles, Food & Drink, Cooking & Recipes and 30 other categories.


1 AdReactor is leading in most countries, including Indonesia, India, Tokelau, United States and 81 other countries.

2 GroupM Server is leading in Germany, Poland, Denmark, Spain and 14 other countries.