Opta Widget is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Opta Widget has better usage coverage in more websites categories. Including Sports, Soccer, News & Media, Newspapers and 20 other categories.
SimilarWeb Website Visits is leading in Internet & Telecom, Tourism, Travel, Food & Drink and 11 other categories.
Opta Widget is leading in most countries, including Spain, United Kingdom, Italy, Australia and 36 other countries.
SimilarWeb Website Visits is leading in Japan, Russia, India, Poland and 11 other countries.