APSIS is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
iContact has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Shopping, Health and 116 other categories.
APSIS is leading in Business & Industry, Science, Social Sciences, Marketing & Advertising and 41 other categories.
iContact is leading in most countries, including United States, Canada, United Kingdom, Australia and 48 other countries.
APSIS is leading in Sweden, Denmark, Norway, Finland and 26 other countries.