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, Business & Industry and 107 other categories.
IAI Shop is leading in Shopping, Clothing, Sports, Consumer Electronics and 46 other categories.
FastSpring is leading in most countries, including United States, Germany, United Kingdom, Brazil and 124 other countries.
IAI Shop is leading in Poland, Lithuania, Belarus, Estonia and 2 other countries.