The LIWC API is available exclusively from Receptiviti. It provides researchers, data scientists, and developers with an easy-to-use API that delivers insights into people’s psychologies and cognitive states by analyzing their use of natural language.

Professor James W. Pennebaker,

Receptiviti Co-founder and Inventor of LIWC

Invented by Receptiviti co-founder, Prof. James W. Pennebaker, LIWC is a language psychology analysis framework through which thousands of researchers have established strong links between linguistic patterns and personality and psychological state.


LIWC is considered the gold-standard of psychology-based NLP; it has over 17,000 research citations spanning a broad range domains including insider threat, deception, relationship initiation and stability, political survival strategies, dementia detection and more. Receptiviti retains the global exclusive commercial rights to LIWC.

See the research citations.

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