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 35 other categories.
SimilarWeb Traffic Sources is leading in Internet & Telecom, Computer & Electronics, Software, Online Marketing and 20 other categories.
Opta Widget is leading in most countries, including Spain, United Kingdom, Italy, Australia and 42 other countries.
SimilarWeb Traffic Sources is leading in Japan, India, Russia, Brazil and 9 other countries.