Qualifio is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Qualifio has better usage coverage in more websites categories. Including News & Media, Arts & Entertainment, Music & Audio, Business & Industry and 27 other categories.
Slashdot Widget is leading in Internet & Telecom, Clothing, Consumer Electronics, Career & Education and 3 other categories.
Qualifio is leading in most countries, including France, Belgium, Spain, Netherlands and 9 other countries.
Slashdot Widget hasn't got a lead over Qualifio in any country.