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 37 other categories.
SimilarWeb Traffic Sources is leading in Internet & Telecom, Computer & Electronics, Software, Online Marketing and 21 other categories.
Opta Widget is leading in most countries, including Spain, United Kingdom, Italy, United States and 44 other countries.
SimilarWeb Traffic Sources is leading in Japan, India, Israel, Ukraine and 9 other countries.