In terms of market share, Unicast is clearly lagging behind, losing to Visible Measures in all segments.
Unicast has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, News & Media and Performing Arts.
Visible Measures is leading in Business & Industry and Marketing & Advertising.
Visible Measures is leading in most countries, including United States.
Unicast hasn't got a lead over Visible Measures in any country.