In terms of market share, eProof is clearly lagging behind, losing to Vizu in all segments.
Vizu has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Internet & Telecom, Computer & Electronics and 31 other categories.
eProof hasn't got a lead over Vizu in any websites category.
Vizu is leading in most countries, including United States, Indonesia, India, United Kingdom and 14 other countries.
eProof hasn't got a lead over Vizu in any country.