What are some alternatives?
When comparing 360 Polaris and MoPub, you can also consider the following products
AerServ - AerServ offers monetization solution for mobile publishers.
Google Ad Manager - Grow revenue wherever your users are with an integrated ad management platform that surfaces insights for smarter business decisions.
OpenX - Ad technology platform available as a hosted service or as an open source download.
px - px tells you what processes are running on your system and how they are interconnected.
ONE by AOL - Ad Serving and Supply Side Platform (SSP)
Clickky - Clickky is a full-stack platform for mobile advertisers and publishers, with the current focus on its own SSP and the RTB Marketplace.