Ion Interactive is leading in Top 1M Sites.
Ion Interactive has better usage coverage in more websites categories. Including Games, Business & Industry, Video Games, Internet & Telecom and 28 other categories.
ReadZ hasn't got a lead over Ion Interactive in any websites category.
Ion Interactive is leading in most countries, including United States, Canada, Australia, India and 13 other countries.
ReadZ is leading in Spain, Belgium and Bahrain.