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, Health and 31 other categories.
Slashdot Widget is leading in Internet & Telecom, Religion & Spirituality, Telecommunications and Consumer Electronics.
Qualifio is leading in most countries, including France, Belgium, Netherlands, United Kingdom and 10 other countries.
Slashdot Widget hasn't got a lead over Qualifio in any country.