What are some alternatives?
OpenX - Ad technology platform available as a hosted service or as an open source download.
ONE by AOL - Ad Serving and Supply Side Platform (SSP)
AerServ - AerServ offers monetization solution for mobile publishers.
Google AdSense - Use Google AdSense to make money online by placing ads on your website and YouTube channel. Start monetizing your website with Google AdSense today.
Unity Ads - Unity Ads allows to supplement the existing revenue strategy by allowing to monetize thr entire player base.
Smart AdServer - The only fully-integrated ad server for managing RTB, Mobile, Video & Web display. Best manage all your campaigns in one interface. Best local support