OpinionLab is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
UpSellit has better usage coverage in more websites categories. Including Shopping, Adult, Finance, Business & Industry and 98 other categories.
OpinionLab is leading in Travel, Tourism, News & Media, Transportation & Logistics and 19 other categories.
UpSellit is leading in most countries, including United States, Canada, Russia, Australia and 31 other countries.
OpinionLab is leading in United Kingdom, France, India, Japan and 29 other countries.