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, Arts & Entertainment and 36 other categories.
SimilarWeb Website Visits is leading in Internet & Telecom, Travel, Search Engine, Career & Education and 23 other categories.
Opta Widget is leading in most countries, including Spain, United Kingdom, Italy, United States and 38 other countries.
SimilarWeb Website Visits is leading in Russia, Japan, Indonesia, Poland and 14 other countries.