Klout is an influence tracking site that mines data social networking services.
Klout is a San Francisco based company that provides social media analytics to measure a user's influence across her or his social network. The analysis is done on data taken from sites such as Twitter and Facebook and measures the size of a person's network, the content created, and how other people interact with that content. The company has been subject to substantial criticism, both for its business model and its operating principle.