TruEffect is leading in Top 100K Sites and Top 1M Sites.
TruEffect has better usage coverage in more websites categories. Including News & Media, Business & Industry, Games, Health and 18 other categories.
Vizu is leading in People & Society, Arts & Entertainment, Law & Government, Government and 16 other categories.
TruEffect is leading in most countries, including United States, Russia, Brazil, Poland and 16 other countries.
Vizu is leading in Indonesia, India, Australia, Germany and 8 other countries.