OpinionLab is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Slice Factory has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Computer & Electronics, Software and 51 other categories.
OpinionLab is leading in Travel, Business & Industry, Accommodation & Hotels, Shopping and 41 other categories.
OpinionLab is leading in most countries, including United States, United Kingdom, Canada, Germany and 48 other countries.
Slice Factory is leading in India, France, Sri Lanka, Senegal and 19 other countries.