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 112 other categories.
APSIS is leading in Business & Industry, Science, Marketing & Advertising, Social Sciences and 48 other categories.
iContact is leading in most countries, including United States, Great Britain, Canada, Australia and 49 other countries.
APSIS is leading in Sweden, Denmark, Norway, Finland and 27 other countries.