In terms of market share, Simple AdServer is clearly lagging behind, losing to Unicast in all segments.
Simple AdServer has better usage coverage in more websites categories. Including Adult, Autos & Vehicles, Motorsports, Computer & Electronics and 3 other categories.
Unicast is leading in Arts & Entertainment and Performing Arts.
Unicast is leading in most countries, including United States.
Unicast is leading in United States.