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 32 other categories.
Slashdot Widget is leading in Internet & Telecom, People & Society, Religion & Spirituality, Telecommunications and one other category.
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.