CheckM8 is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Marchex has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, Shopping, Internet & Telecom and 224 other categories.
CheckM8 is leading in Child Health.
Marchex is leading in most countries, including United States, India, Russia, Canada and 125 other countries.
CheckM8 is leading in Japan, United Kingdom, Israel, Netherlands and 10 other countries.