Monsido is leading in Top 1M Sites.
Observer has better usage coverage in more websites categories. Including Arts & Entertainment, Computer & Electronics, Internet & Telecom, People & Society and 20 other categories.
Monsido is leading in Business & Industry, Travel, Tourism, Transportation & Logistics and 17 other categories.
Observer is leading in most countries, including Russia, Netherlands, Japan, Brazil and 4 other countries.
Monsido is leading in Denmark, United Kingdom, Sweden, Norway and 2 other countries.