No single demo fits a whole buying committee, because the people in the room are accountable for different things. The economic buyer who signs cares about the business case and the risk. The evaluator checks whether you meet the criteria and fit their environment. The champion needs proof they can defend to their own boss. Tailor the demo to the person watching — that's how you run a demo that moves a deal instead of just impressing one fan.
Demo to the economic buyer (business case + risk)
When the decision-maker is in the room, keep it short and outcome-led. Lead with the business case you've built — the cost today, the value of the fix, the payback. Show the product only as proof the value is real and the risk is low. They're deciding whether to spend and whether it's safe to do so; give them the confidence to say yes.
Demo to the evaluator (criteria + fit)
The technical or functional evaluator is grading you against written requirements and real constraints — integration, security, architecture, workflows. Give them depth where their criteria live and be honest about fit. An evaluator who trusts you is the difference between a clean vendor evaluation and a late veto.
Demo to the champion (ammunition)
Your champion is going to argue for you when you're not in the room. Their demo isn't about them being impressed — it's about giving them the proof, the language, and the answers to the objections their company will raise. Walk away knowing your champion can restate the case and the outcomes cold.
The discipline
Before any demo, ask who's in the room and what each person is accountable for — then build the demo around the highest-stakes audience present, and briefly serve the others. If you can't split the room, run separate demos for the economic buyer and the evaluators. Showing everyone everything is how demos become feature tours that convince no one.
Start here
The demo is proof; the next step is packaging that proof into the document that gets approved — writing a proposal the buyer can defend inside their own company.