What are some alternatives?
When comparing PowerInbox and Nativo, you can also consider the following products
StackAdapt - Native advertising demand side platform.
Adobe Advertising Cloud - Adobe Advertising Cloud is ads providing a platform that lets your media-related thing to lift on the high note.
MGID - MGID is a native advertising platform to acquire visitors, monetize websites, build new audiences, and grow traffic.
AerServ - AerServ offers monetization solution for mobile publishers.
Pixfuture - Pixfuture is a self serve advertisement platform for advertisers and publishers.
Gold Lasso - Publishers, monetize and automate your email newsletters in new and unique ways.