PayZen is leading in Top 1M Sites.
PayZen has better usage coverage in more websites categories. Including Business & Industry, Internet & Telecom, Shopping, Travel and 15 other categories.
UpClick is leading in Computer & Electronics, Software, Programming, People & Society and 4 other categories.
UpClick is leading in most countries, including United States, Germany, Brazil, United Kingdom and 6 other countries.
PayZen is leading in France, French Polynesia, Australia, Belgium and one other country.