Celtra is leading in Top 100K Sites and Top 1M Sites.
Celtra has better usage coverage in more websites categories. Including Computer & Electronics, Sports, Internet & Telecom, Software and 19 other categories.
SelectMedia is leading in News & Media, Education, Career & Education, Technology News and one other category.
Celtra is leading in most countries, including United States, Germany, United Kingdom, Turkey and 15 other countries.
SelectMedia is leading in Israel, Indonesia, India, Brazil and 2 other countries.