What Is a Proof of Concept (POC)?

A well-run POC has a written scope, a start and end date, named participants, the data or systems involved, and success criteria stated as pass or fail tests. The seller supplies setup help and support. The buyer supplies people, access, and time. At the end both sides review the results against the criteria, and the buyer decides whether to proceed. A demo shows the product, a free trial lets the buyer explore alone, and a POC tests one specific claim under real conditions.

POCs belong to complex or risky purchases, where an evaluator needs proof beyond a presentation. They tend to appear after discovery has confirmed the problem and before procurement begins. A seller’s job is to keep the test narrow: one use case, a small group, a clear question. The best POCs are tied to a business reason the economic buyer cares about, so passing the test leads directly to a decision instead of another meeting.

Open-ended POCs cause the most trouble. Without success criteria or a decision date, they turn into free consulting that drags on while the buyer’s attention moves elsewhere, and scope creep follows as every stakeholder adds a request. Warning signs include no executive sponsor, no named owner on the buyer side, and a vague promise to see how it goes. Many sellers protect themselves by requiring written criteria, a fixed end date, and a conversation about next steps before the POC starts.