Market Share by Top Websites

2 In terms of market share, Fathom SEO is clearly lagging behind, losing to Nextag ROI Optimizer in all segments.

Websites Categories

1 Fathom SEO has better usage coverage in more websites categories. Including Business & Industry, Senior Health, Health, Computer & Electronics and 18 other categories.

2 Nextag ROI Optimizer is leading in Shopping, Home & Garden, Marketing & Advertising, Clothing and 16 other categories.


1 Nextag ROI Optimizer is leading in most countries, including France, Germany, Greece, Japan and 2 other countries.

2 Fathom SEO is leading in United States and China.