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 20 other categories.
Unister is leading in Travel, Tourism, Airlines & Airports, Sports and one other category.
Unister is leading in most countries, including Germany, Switzerland, Austria, Ukraine and 4 other countries.
Fathom SEO is leading in United States, India, Japan and South Africa.