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 104 other categories.
IAI Shop is leading in Shopping, Clothing, Sports, Health and 49 other categories.
FastSpring is leading in most countries, including United States, Germany, India, Brazil and 101 other countries.
IAI Shop is leading in Poland, Belarus, Ireland, Lithuania and 4 other countries.