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 40 other categories.
SimilarWeb Traffic Sources is leading in Internet & Telecom, Computer & Electronics, Software, Online Marketing and 22 other categories.
Opta Widget is leading in most countries, including United Kingdom, Spain, Italy, United States and 49 other countries.
SimilarWeb Traffic Sources is leading in India, Viet Nam, Poland, Georgia and 9 other countries.