Alchemer, a Louisville, Colo.-based survey software platform, acquired Apptentive, a Seattle startup that helps mobile app-makers gather customer feedback. Terms of the deal were not disclosed. Alchemer raised capital from private equity firm KKR & Co. in May, in part to find a startup to acquire. “Our board and investors are excited about the outcome and what it means for our next chapter,” CEO and co-founder Robi Ganguly told GeekWire. Apptentive helps clients like Alaska Airlines, Safeway, and CNN power in-app surveys and rating/review prompts. The startup ranks No.