Centro
1,020 websites

Centro is free to use

http://www.centro.net

Centro is a digital media services and technology company. Founded in 2001 and headquartered in Chicago with 17 offices nationwide, Centro serves over 350 agencies representing more than 1,100 advertisers. Centro’s commitment to culture, ...

VS

Underdog Media
3,858 websites

Underdog Media is free to use

http://underdogmedia.com

Based in Santa Barbara, California, Underdog Media was founded in 2007 by Shayne Mihalka, a former executive at ValueClick Media and FastClick.com. The proprietary ad serving technology was carefully designed to be simple to use, efficie...

Market Share by Top Websites

1 Underdog Media is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Centro is clearly lagging behind, losing to Underdog Media in all segments.

Websites Categories

1 Underdog Media has better usage coverage in more websites categories. Including News & Media, Arts & Entertainment, Science & Education, Games and 19 other categories.

2 Centro is leading in Travel & Tourism.

Geography

1 Underdog Media is leading in most countries, including United States, Poland, Romania, United Kingdom and 96 other countries.

2 Centro is leading in Kyrgyzstan, Malawi and Uganda.