Proof of Concept Explained: The Three Types Every Sales Professional Must Know

A proof of concept is a structured evaluation that buyers use when they do not yet fully trust a product or solution. In this session, sales strategist Michael Humblet breaks down the core reason POCs exist — trust — and identifies the three distinct forms they take in practice. Whether you are selling software, hardware, or complex services, knowing which type of POC a prospect is running changes how you prepare, what you demonstrate, and how you measure success. This session gives you a clear mental model so you can approach every POC with confidence and a defined strategy.

Learning objectives

• Define proof of concept (POC) and explain the underlying buyer motivation that drives the request
• Distinguish between the three main types of POC: product validation, system integration, and user acceptance
• Identify which type of POC a prospect is conducting so you can tailor your approach accordingly
• Recognise why user acceptance testing is often the most critical and overlooked POC type
• Apply this framework to reduce POC risk and increase the likelihood of a successful outcome

Key takeaways

• POCs exist because buyers do not yet fully trust your product — addressing that trust gap is the real objective
• Type 1 — Product Validation: does the product do what you claim it does at the required performance level?
• Type 2 — Integration: can your product connect and operate within the buyer's existing technical infrastructure?
• Type 3 — User Acceptance: will internal and external users actually adopt and engage with the product in their environment?
• Knowing which POC type you are in allows you to set the right success criteria and manage stakeholder expectations from the start