How to Vet an AI Vendor Without a Technical Team

Buying AI is hard when you do not have a technical team to tell the substance from the sales pitch. The demos all look impressive, the language is confident, and the claims are difficult to check from the outside. Plenty of capable-sounding vendors will quietly leave you with software you cannot maintain, data you cannot move, and quality that no one ever actually measured.

You do not need to be an engineer to vet a vendor well. You need the right questions and the discipline to insist on real answers rather than reassurance. Here are the ones that matter most, and what good and bad answers tend to sound like.

How will they handle your data?

Your data is the asset most at risk in any AI engagement, so start there. Ask plainly: where is our data stored, who can access it, is it used to train anyone's models, and what happens to it when we stop working together? A serious vendor answers these clearly and is willing to put the answers in writing. Vague reassurance, or an answer that shifts depending on who you ask, is itself a warning sign.

Pay attention to how the answers are given, not only what they contain. A vendor who treats these as fair, expected questions is a good sign. One who seems surprised or irritated that you asked is telling you how much thought they have actually given to protecting the thing that matters most to you.

How do they measure quality?

AI systems fail in ways that are easy to hide behind a confident tone. Ask how they evaluate quality before and after launch. Do they test against realistic examples drawn from work like yours? Can they show you how often the system is right, and what happens when it is wrong? If quality is described only as impressive or cutting-edge, rather than measured and reported, stay sceptical.

It helps to ask what happens on a bad day. How would they even know the system had started producing worse answers? If the honest answer is that a customer would have to complain first, quality is not being measured at all, it is just being hoped for. Real evaluation catches problems before your users ever do.

What are their security basics?

You do not need deep expertise to ask sensible security questions and listen for clear, specific answers. You are checking whether they have thought about this at all, or whether security is an afterthought they would rather not discuss.

• How is access to systems and data controlled, and who has it?
• How are secrets and credentials managed and rotated?
• What happens if there is a breach, and how quickly would we be told?
• Do they follow recognised security practices, and can they explain them simply?

Lock-in, portability and who owns the code

Ask who owns the code and the data when the project ends, and how hard it would be to move to another provider or bring the work in-house. Some lock-in is normal and even reasonable, but it should be a choice you make with open eyes, not a trap you discover later when you try to leave. If the honest answer is that leaving would be slow, painful and expensive, factor that into the decision now rather than after you have signed.

Portability is not really about distrust, it is about leverage. A vendor who knows you could leave has every reason to keep serving you well. A vendor who knows you are trapped does not. The cost of an exit is worth understanding at the very start, while you still have the negotiating power to shape the terms.

Ask for references, and actually call them

Any vendor worth hiring can point you to clients who will speak honestly about working with them. The value is in the awkward questions, so ask them: what went wrong, how the vendor handled it when it did, and whether they would hire them again knowing what they know now. A vendor who cannot or will not provide references is telling you something important, and it is worth listening.

Two questions tend to be the most revealing of all. Ask what the vendor was like when something went wrong, because something always does eventually, and ask the reference what they wish they had known before they signed. The answers will tell you far more than any polished case study on the website ever could.

Red flags to watch for

A few patterns come up again and again when an engagement is heading for trouble. None of them is automatically disqualifying, but two or three together should give you real pause.

• Guaranteed results, or claims that sound too good to be measured.
• Reluctance to put data handling and ownership terms in writing.
• No clear way to describe how they test quality.
• Pressure to sign quickly, before you have had time to check anything.
• Answers that grow vaguer the more specific your questions become.

When to bring in a second opinion

If a decision is large or hard to reverse, it is worth having someone technical in your corner for an hour, even when you do not have one on staff. A short, independent review of a vendor's claims and contract often pays for itself many times over, simply by surfacing the questions you would not have known to ask. Sitting on the buyer's side of these conversations, translating sales language into plain questions and honest answers, is exactly the kind of thing a fractional CTO is there for.