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, Industrial Goods & Services and 21 other categories.
Unister is leading in Travel, Tourism, Airlines & Airports and Sports.
Unister is leading in most countries, including Germany, Switzerland, Austria, Ukraine and 4 other countries.
Fathom SEO is leading in United States, Hong Kong, Japan, Philippines and one other country.