AppNexus
trend
853,735 websites

AppNexus offers both free and paid options

http://www.appnexus.com

AppNexus is the most advanced platform for buying real-time online advertising. AppNexus's clients include the largest ad networks and online advertisers. AppNexus offers a proprietary gateway to premier ad exchanges and ad inventory aggreg...

VS

Centro
trend
3,327 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, ...

Market Share by Top Websites

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

2 Despite its recent growth, Centro is still behind AppNexus in all market share segments.

Websites Categories

1 AppNexus has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Business & Industry, Internet & Telecom and 240 other categories.

2 Centro hasn't got a lead over AppNexus in any websites category.

Geography

1 AppNexus is leading in most countries, including United States, Germany, Japan, France and 224 other countries.

2 Centro hasn't got a lead over AppNexus in any country.