Market Share by Top Websites

1 GroupM Server is leading in Top 10K Sites, Top 1M Sites and The Entire Web.

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

Websites Categories

1 Undertone Networks has better usage coverage in more websites categories. Including People & Society, News & Media, Business & Industry, Sports and 60 other categories.

2 GroupM Server is leading in Arts & Entertainment, Internet & Telecom, Autos & Vehicles, Music & Audio and 35 other categories.


1 GroupM Server is leading in most countries, including Poland, Germany, Denmark, Austria and 24 other countries.

2 Undertone Networks is leading in United States, United Kingdom, Japan, Indonesia and 16 other countries.