The Vendor Demo Is a Magic Trick. Watch the Other Hand.

Every good demo is a magic trick. I don't mean that as an insult. A magician points your attention at the right hand so you don't watch the left. A good sales engineer does the same thing, and the best ones are very, very good at it.

I spent years advising executives on technology decisions, and I watched smart people get dazzled the same way over and over. Not because they were careless. Because the demo was built to do exactly that. Knowing how to evaluate software vendor demos is one of the most underrated skills a leader can have.

What do software vendor demos usually hide?

A demo shows the happy path: clean data, a perfect user, and a scenario that's been rehearsed fifty times. What it leaves out is usually what decides whether you'll succeed.

• How it handles your messy data

• How long setup really takes, and who does the work

• What happens when it gets something wrong

• What the admin and maintenance experience looks like

• What it costs after year one

How do you evaluate a software vendor demo?

You evaluate a software vendor demo by taking control of the script. Send your own scenario two weeks ahead, ask to see it run on a sample of your real (sanitized) data, and bring the people who will use the product every day, not just the people who will sign for it.

Then use the scorecard below. Score each answer 1 to 3 while you're in the room, not afterward when the glow has set in.

One rule overrides everything else on the card. Anything shown on a slide instead of in the live product gets a zero. Roadmaps are promises. You're buying what exists.

If it's on a slide and not in the product, it doesn't exist yet.

Should you run a proof of concept after the demo?

For any decision you'll live with for three years or more, yes. A short, scoped proof of concept on your data with your people is the only honest test. If a vendor resists one, that tells you something.

The takeaway

Next time you sit through a demo, print the six questions and hand them to everyone in the room. Watch the other hand. Vendor and market assessment is one of the core services we offer at Kairos Telos, and this scorecard is where most of our evaluations start.

And if the demo is for an AI tool, read Your AI Pilot Isn't Failing. Your Adoption Plan Is. before you sign. Buying the tool is the easy part.

Frequently asked questions

How long should a software vendor demo be?

Plan for 60 to 90 minutes with at least half the time spent on your scenario and your questions. A demo that's all presentation and no live product should raise a flag.

What should I send a vendor before a demo?

Send a written scenario based on a real workflow, a small sanitized sample of your data, and the list of questions you plan to ask. It forces the vendor off the script.

What are red flags in a software demo?

Features shown only on slides, reluctance to use your data, vague answers about implementation time, and no reference customers similar to you.

Got a big vendor decision on the table? Let's pressure-test it together.