In terms of market share, Nextag ROI Optimizer is clearly lagging behind, losing to Unister in all segments.
Nextag ROI Optimizer has better usage coverage in more websites categories. Including Shopping, Business & Industry, Marketing & Advertising, Home & Garden and 23 other categories.
Unister is leading in Travel, Tourism, Airlines & Airports and Software.
Nextag ROI Optimizer is leading in most countries, including United States, France, Japan, Australia and 5 other countries.
Unister is leading in Germany, Switzerland, Austria and China.