Lithium has acquired US-based Klout, an analytics firm backed by Microsoft that measures online influence, for a reported $200m.

US-based customer engagement software developer Lithium Technologies has acquired Microsoft-backed web analytics firm Klout in an all-share deal reported by Fortune to be worth $200m.

Founded in California in 2008, Klout measures the online presence and influence of individual users and business using big data analytics that examine social media output. Brands can also offer rewards in the form of ‘Perks’, based on a user’s potential online influence, allowing them to tap influential voices on the web.

Microsoft made a…