“Predictive is clearly the killer app of big data.” So said Chet Kapoor, CEO of API management and predictive analytics start-up Apigee, which has been acquired for $625m by Google. This will boost the search giant’s cloud business, as cloud applications increasingly become the point of interaction for businesses and their customers. Apigee is best known in the mobile world for taking over the technology underpinning WAC (Wholesale Application Community), a failed initiative by a group of cellcos to establish a common developer base around their key network APIs, in a bid to wrongfoot over-the-top platforms. The deal helped bolster Apigee’s own platform in the carrier world – it powers Telefonica’s API platform for linking third party developers into its…