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, Computer & Electronics and 20 other categories.
Unister is leading in Travel, Tourism, Internet & Telecom, Autos & Vehicles and 4 other categories.
Unister is leading in most countries, including Germany, Ukraine, Austria, China and 7 other countries.
Fathom SEO is leading in United States.