Adwit
2 websites

Adwit offers both free and paid options

http://www.adwitserver.com/

Adwit's exclusive ad optimization system (patent pending) combines contextual and behavioural analysis technologies, optimizing each ad zone with real time analysis of user profiles to match individual profiles with optimal display ads. ...

VS

Spark Studios
3 websites

Spark Studios is free to use

http://sparkstudios.com/

Spark : Real Traffic System. A Premium Advertising Network. SIGN UPLOG ... Copyright © 2010 Spark Studios. 10811 Washington Boulevard, 4th Floor Culver ...

Market Share by Top Websites

2 In terms of market share, Adwit is clearly lagging behind, losing to Spark Studios in all segments.

Websites Categories

1 Spark Studios has better usage coverage in more websites categories. Including Arts & Entertainment and Sports.

2 Adwit is leading in Food & Drink.

Geography

1 Adwit is leading in most countries, including Brazil and Spain.

2 Spark Studios is leading in United States.