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, People & Society and 92 other categories.
IAI Shop is leading in Shopping, Business & Industry, Clothing, Sports and 52 other categories.
FastSpring is leading in most countries, including United States, United Kingdom, Germany, India and 101 other countries.
IAI Shop is leading in Poland, Slovakia, Lithuania, Belarus and 2 other countries.