Here is a follow up interview with Raj Kadam, CEO of Viralheat API whom we have interviewed on the Sentiment Analysis API here. In 2012, Viralheat had about 30 billion calls over all its' APIs. Viralheat just announced a new API called Human Intent API.
Hello Social, aimed at liberating social media data and enabling users to better engage their social media audience, just launched its company and an API to better incorporate its product offering into existing apps and workflows. Hello Social focuses on the term "engage". Since social media has taken firm hold in the marketing space, Hello Social believes true engagement with social media audiences unlocks the true potential of social media marketing.