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, Computer & Electronics, Technology News, Software and 19 other categories.
SelectMedia is leading in Education, Career & Education, Adult and Business News.
Celtra is leading in most countries, including United States, United Kingdom, Argentina, Germany and 21 other countries.
SelectMedia is leading in Viet Nam, Israel and Indonesia.