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, Software, Business & Industry and 13 other categories.
SelectMedia is leading in People & Society, Education and Career & Education.
Celtra is leading in most countries, including United States, Mexico, United Kingdom, Turkey and 15 other countries.
SelectMedia is leading in Viet Nam, Israel and Poland.