Monsido is leading in Top 100K Sites and Top 1M Sites.
Monsido has better usage coverage in more websites categories. Including Business & Industry, Travel, Tourism, Health and 18 other categories.
Observer is leading in Arts & Entertainment, Computer & Electronics, People & Society, Internet & Telecom and 18 other categories.
Observer is leading in most countries, including United States, Russia, Japan, Germany and 5 other countries.
Monsido is leading in Denmark, United Kingdom, Sweden, Norway and 3 other countries.