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 22 other categories.
SimilarWeb Website Visits is leading in Internet & Telecom, Travel, Tourism, Food & Drink and 16 other categories.
Opta Widget is leading in most countries, including Spain, United Kingdom, Italy, Australia and 33 other countries.
SimilarWeb Website Visits is leading in Russia, Japan, Turkey, India and 15 other countries.