In terms of market share, Fathom SEO is clearly lagging behind, losing to Unister in all segments.
Fathom SEO has better usage coverage in more websites categories. Including Business & Industry, Health, Senior Health, Shopping and 17 other categories.
Unister is leading in Travel, Tourism, Internet & Telecom, Airlines & Airports and 4 other categories.
Unister is leading in most countries, including Germany, Austria, China, Switzerland and 5 other countries.
Fathom SEO is leading in United States, Canada, Iran, Mexico and one other country.