Qualifio 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, News & Media, Music & Audio, Business & Industry and 23 other categories.
Slashdot Widget is leading in Internet & Telecom, People & Society, Shopping, Clothing and 5 other categories.
Qualifio is leading in most countries, including France, Belgium, Netherlands, Spain and 9 other countries.
Slashdot Widget hasn't got a lead over Qualifio in any country.