Opta Widget is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Qualifio has better usage coverage in more websites categories. Including Arts & Entertainment, Music & Audio, Health, Magazines & E-Zines and 27 other categories.
Opta Widget is leading in Sports, Soccer, News & Media, Newspapers and 15 other categories.
Opta Widget is leading in most countries, including Spain, United Kingdom, Italy, Australia and 39 other countries.
Qualifio is leading in France, Belgium, Netherlands, Switzerland and 2 other countries.