FastSpring is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
FastSpring has better usage coverage in more websites categories. Including Computer & Electronics, Software, Arts & Entertainment, Internet & Telecom and 104 other categories.
IAI Shop is leading in Shopping, Business & Industry, Clothing, Sports and 48 other categories.
FastSpring is leading in most countries, including United States, Germany, Brazil, India and 109 other countries.
IAI Shop is leading in Poland, Belarus, Lithuania, Latvia and 6 other countries.