AppNexus
trend
365,356 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
1,610 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 In terms of market share, Centro is clearly lagging behind, losing to AppNexus in all segments.

Websites Categories

1 AppNexus has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Business & Industry, Internet & Telecom and 239 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, France, United Kingdom, Germany and 195 other countries.

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