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 20 other categories.
SimilarWeb Website Visits is leading in Internet & Telecom, Search Engine, Travel, Tourism and 16 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, Brazil, Indonesia and 16 other countries.