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, Internet & Telecom and 76 other categories.
Opta Widget is leading in Sports, Soccer, News & Media, Newspapers and 32 other categories.
Opta Widget is leading in most countries, including Great Britain, Spain, Italy, United States and 61 other countries.
Viadeo is leading in France, Belgium, Switzerland, Morocco and 34 other countries.