The short answer is to judge an AI trainer in Kenya on evidence rather than on claims, because anyone can call themselves a trainer and the evidence does the sorting for you.
Knowing AI and teaching it are two different skills, and the second one is what you are actually buying. Ask for a recording of a real session, or ask to sit in on part of a live class. Then check whether the trainer still practises. Tools change monthly, so ask what they used this week and what has shifted in the last three months; trainers who build things or publish regularly usually have a current answer.
Fit matters as much as competence. A trainer who works with executives will handle a boardroom differently from one who teaches students, so describe your team and ask what they would change in their standard programme. A vague answer predicts generic training.
Formal qualifications help. For programmes in Kenya's TVET system, TVETA requires trainers to be registered and licensed and publishes an accredited-trainers list. For corporate AI training, still verify teaching evidence and fit directly. Finish with two steps: get the scope in writing, covering what happens before, during and after the sessions, and ask for one referee you can call. A ten minute conversation with a past client tells you more than a page of testimonials. If a trainer fails two or more of these checks, keep looking, whatever their price.