StackAdapt is leading in Top 100K Sites and Top 1M Sites.
zapunited has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Adult, Photography and 56 other categories.
StackAdapt is leading in Health, Cycling & Biking, Chats & Forums, Nursery & Playroom and 4 other categories.
zapunited is leading in most countries, including India, United States, Indonesia, Turkey and 17 other countries.
StackAdapt is leading in Canada, Egypt, Netherlands, Philippines and one other country.