The Yahoo + Amperity Partnership
Yahoo and Amperity have an active Technology Partnership according to amperity.com. There are 133 companies in the Yahoo partner ecosystem and 144 companies in the Amperity partner ecosystem.
4 companies exist in both ecosystems, representing 3% of the Yahoo parther ecosystem and 3% of the Amperity partner ecosystem. AppsFlyer and AdRoll are the largest companies that exist in both ecosystems.