WebTrends Ads
2 websites

WebTrends Ads is free to use

http://webtrends.com/solutions/campaign-optimization

Webtrends Optimize gives marketers the tools that they need to customize user ... optimize your global ad spend across paid search and Facebook ads without ...

VS

zapunited
4 websites

zapunited offers both free and paid options

http://www.zapunited.com/

Earn Money with attractive advertising on your website, blog, forum, or app. Generate traffic, buzz and conversions with efficient advertising.

Market Share by Top Websites

2 In terms of market share, WebTrends Ads is clearly lagging behind, losing to zapunited in all segments.

Websites Categories

1 WebTrends Ads has better usage coverage in more websites categories. Including Computers Electronics & Technology.

2 zapunited hasn't got a lead over WebTrends Ads in any websites category.

Geography

1 zapunited is leading in most countries, including Sri Lanka, Pakistan and United States.

2 WebTrends Ads hasn't got a lead over zapunited in any country.