Popular alternatives include OrbitSoft DSP, Platform.io, AdMachine White Label DSP, AdOperator and Admedo.
Key factors include Audience Targeting, Budget Management, Reporting, Real-time Bidding, Geo Targeting and pricing.
Tools like StackAdapt, The Trade Desk, Choozle, Adzooma and Hybrid Platform are best for small businesses for Demand Side Platform (DSP).