In terms of market share, HitSniffer is clearly lagging behind, losing to Vizu in all segments.
HitSniffer has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, People & Society, Shopping and 16 other categories.
Vizu hasn't got a lead over HitSniffer in any websites category.
HitSniffer is leading in most countries, including United States, Australia, Russia, United Kingdom and 43 other countries.
Vizu is leading in Hungary, Iraq, Malaysia and Sri Lanka.