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, Clothing, Marketing & Advertising and 18 other categories.
Unister is leading in Travel, Tourism, Investing, Finance and one other category.
Nextag ROI Optimizer is leading in most countries, including United States, United Kingdom, France, Saudi Arabia and 4 other countries.
Unister is leading in Germany, Switzerland, Austria, Ukraine and 3 other countries.