Opta Widget is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Viadeo has better usage coverage in more websites categories. Including Business & Industry, People & Society, Career & Education, Arts & Entertainment and 78 other categories.
Opta Widget is leading in Sports, Soccer, News & Media, Newspapers and 30 other categories.
Opta Widget is leading in most countries, including United Kingdom, Spain, Italy, United States and 57 other countries.
Viadeo is leading in France, Russia, Morocco, Algeria and 34 other countries.