acxiom
12 websites

acxiom offers both free and paid options

https://www.acxiom.com/

Acxiom Provides the Data and Technology Foundation for Marketers

VS

V12
24 websites

V12 costs money

http://www.v12data.com/

As an omnichannel data powerhouse, V12 Data combines rich data assets with robust technology to provide brands with a seamless and connected customer view.

Market Share by Top Websites

2 acxiom is leading in Top 100K Sites.

Websites Categories

1 acxiom has better usage coverage in more websites categories. Including Finance, Arts & Entertainment, E-commerce & Shopping, Science & Education and one other category.

2 V12 is leading in Computers Electronics & Technology and Food & Drink.

Geography

1 V12 is leading in most countries, including Russia, Saudi Arabia, Austria, Belgium and 3 other countries.

2 acxiom is leading in United States and France.