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 21 other categories.
Monsido is leading in Business & Industry, Travel, Tourism, Transportation & Logistics and 16 other categories.
Observer is leading in most countries, including United States, Russia, Japan, Germany and 10 other countries.
Monsido is leading in Denmark, United Kingdom, Sweden, France and 4 other countries.