Sanoma is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Silverpop has better usage coverage in more websites categories. Including Business & Industry, People & Society, Shopping, Death and 96 other categories.
Sanoma is leading in News & Media, Arts & Entertainment, Sports, Music & Audio and 15 other categories.
Silverpop is leading in most countries, including United States, United Kingdom, Canada, Australia and 40 other countries.
Sanoma is leading in Finland, Denmark, Norway, Peru and 20 other countries.