WebProspector is leading in Top 100K Sites and Top 1M Sites.
WebProspector has better usage coverage in more websites categories. Including Business & Industry, Internet & Telecom, Marketing & Advertising, Computer & Electronics and 41 other categories.
Zeta Search is leading in Career & Education, Alternative & Natural Medicine, Financial Management, Banking and 4 other categories.
WebProspector is leading in most countries, including Germany, Austria, France, Spain and 6 other countries.
Zeta Search is leading in United States, India and Canada.