Nextag ROI Optimizer
3 websites

Nextag ROI Optimizer is free to use

http://nextagsellers.blogspot.com/2010/02/roi-optimizer.html

2 Feb 2010 ... The ROI Optimizer is one of the most important features that you can implement to understand the performance of your account. What is it?

VS

Peerius
67 websites

Peerius is free to use

http://www.peerius.com/

Peerius - Personalisation. ... Maximise your ecommerce sales with Peerius. The market leader in multi-channel personalisation. Increased sales; Improved ...

Market Share by Top Websites

1 Peerius is leading in Top 100K Sites and Top 1M Sites.

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

Websites Categories

1 Peerius has better usage coverage in more websites categories. Including Lifestyle, Health, E-commerce & Shopping, Food & Drink and 7 other categories.

2 Nextag ROI Optimizer hasn't got a lead over Peerius in any websites category.

Geography

1 Peerius is leading in most countries, including Germany, United Kingdom, United States, Australia and 12 other countries.

2 Nextag ROI Optimizer hasn't got a lead over Peerius in any country.