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, Business & Industry and 23 other categories.
SimilarWeb Website Visits is leading in Internet & Telecom, Search Engine, Travel, Tourism and 18 other categories.
Opta Widget is leading in most countries, including Spain, United Kingdom, Italy, Australia and 35 other countries.
SimilarWeb Website Visits is leading in Japan, Russia, Indonesia, Poland and 11 other countries.