Check online for what is POC, meanings of POC, and other abbreviation, acronym, and synonyms. What is Proof of Concept? A proof of concept (POC) is a series of activities intended to demonstrate the potential effectiveness of an early stage project, change, business idea, or product idea. PoC can occur at any point in the software development life cycle. You can use it at the start to test the viability of the entire idea, or you can use it halfway through the project to test a specific feature. The PoC or Proof of Concept is a study of the feasibility and viability of a product or service from a technical, commercial and economic point of view.