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 36 other categories.
SimilarWeb Website Visits is leading in Internet & Telecom, Travel, Tourism, Career & Education and 29 other categories.
Opta Widget is leading in most countries, including United Kingdom, Spain, Italy, United States and 45 other countries.
SimilarWeb Website Visits is leading in Russia, Poland, Greece, Ukraine and 12 other countries.