Open AdExchange is leading in Top 100K Sites.
zapunited has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Adult, Photography and 54 other categories.
Open AdExchange is leading in Business & Industry, Marketing & Advertising, Real Estate, Travel and 10 other categories.
zapunited is leading in most countries, including India, United States, Germany, Russia and 13 other countries.
Open AdExchange is leading in Denmark, Netherlands, Sweden, Italy and one other country.