Celtra is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Celtra has better usage coverage in more websites categories. Including News & Media, Internet & Telecom, Business & Industry, Marketing & Advertising and 12 other categories.
SelectMedia is leading in Education, Womens Interests and Sports.
Celtra is leading in most countries, including United States, Germany, France, Canada and 21 other countries.
SelectMedia is leading in Israel, Viet Nam, Indonesia and Brazil.