Market Share by Top Websites

1 Quantcast 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 Quantcast in all market share segments.

Websites Categories

1 Quantcast has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, Business & Industry, Music & Audio and 240 other categories.

2 Act-On hasn't got a lead over Quantcast in any websites category.


1 Quantcast is leading in most countries, including United States, Germany, United Kingdom, Russia and 213 other countries.

2 Act-On is leading in Sao Tome.