How to conduct customer interviews that reveal the truth

Building a startup requires a constant stream of information from the outside world. This process focuses on the art and science of the customer interview. The goal is to move past the surface level feedback that people give to be polite and instead reach the hard truths about their problems and behaviors. We will cover the mindset required to stay objective, the specific types of questions that yield data instead of opinions, and how to handle the interview process to ensure you are not leading the witness. The focus here is on discovering reality so you can make decisions based on evidence rather than assumptions.

When I work with startups I like to start by stripping away the role of the salesperson. When you are in an interview, you are not there to convince anyone that your idea is good. In fact, if the person you are talking to starts praising your idea, the interview is likely heading off track. You are a researcher or a journalist. Your job is to collect data points about a specific problem or a set of behaviors. This requires a level of emotional detachment from your product.

Founders often fall into the trap of looking for validation. It feels good when someone says they like your idea, but that feeling is dangerous because it provides a false sense of security. Most people are naturally inclined to be nice and will tell you what they think you want to hear. To get the truth, you have to create an environment where the person feels comfortable telling you that your concept is useless or that they would never pay for it.

Consider these questions as you prepare:

• Am I looking for a specific answer to prove I am right?
• How will I react if this person tells me the problem I am solving does not exist?
• Am I willing to change my entire product roadmap based on what I learn today?

The biggest mistake in customer discovery is asking about the future. Questions like, would you use this, or, how much would you pay for this, are essentially useless. Humans are notoriously bad at predicting their own future behavior. They will give you an optimistic answer that rarely matches their actual actions when the time comes to pull out a credit card. Instead of the future, focus entirely on the past and the present.

When I am helping a team draft their interview script, I push them to ask about specific instances. Instead of asking if someone finds a task difficult, ask them to tell you about the last time they did that task. Ask them to walk you through the steps. Ask what they did to solve the frustrations they encountered. This grounds the conversation in reality. If they have not spent money or time trying to solve the problem in the past, they probably will not spend money on your solution in the future.

Try using these prompts during your session:

• Tell me about the last time you dealt with this problem.
• What was the hardest part about that experience?
• What, if anything, are you currently doing to solve this?
• Where does the money for this current solution come from in your budget?

During the actual interview, your most powerful tool is silence. As entrepreneurs, we are often uncomfortable with quiet moments and feel the need to fill the gap with a pitch or more explanation. Resist this urge. When you ask a question, give the person time to think and speak. Often, the most valuable insights come after a long pause when the person has had time to dig deeper into their own memory or feelings.

I always suggest the eighty twenty rule for these meetings. The customer should be speaking eighty percent of the time. If you find yourself talking more than twenty percent, you are likely leading them or selling to them. Your goal is to be a guide who keeps them on the topic of their own life and challenges. When they say something interesting, do not jump to your solution. Instead, ask them why they felt that way or if they can give you an example.

Keep these tactical tips in mind:

• Do not mention your product or idea until the very end of the interview, if at all.
• Take notes on their specific vocabulary because the words they use to describe their pain are the words you should use in your marketing.
• If they give a vague answer, ask for a specific story to illustrate their point.

Once the interview is over, the work of analysis begins. It is easy to get caught in a cycle of endless debate with your cofounders about what a specific comment meant. I have seen teams waste weeks arguing over the interpretation of a single user interview. Avoid this. Movement is always better than debate. If you have a piece of feedback that suggests a new direction, find a way to test it quickly rather than discussing it for days.

Look for patterns across multiple interviews. One person saying something is an anecdote, but five people saying the same thing is a data point. Pay close attention to where people get emotional. If they get angry or frustrated when talking about a specific process, you have likely found a significant pain point. Conversely, if they describe a problem in a bored or academic way, it might not be a problem they are willing to pay to solve.

Ask yourself and your team these questions after a round of interviews:

• What surprised us the most during these conversations?
• Which of our initial assumptions were proven wrong by factual stories?
• What is the smallest possible move we can make to address the biggest pain point we heard?

The startup environment is inherently uncertain. You are building something where nothing existed before, and the temptation to rely on your own intuition is strong. While intuition has its place, it should be informed by the ground truth of your market. Conducting interviews that reveal the truth is not about being right, it is about being informed.

Every hour you spend listening to a potential customer is an hour you are not spending building a feature that nobody wants. This is the hard work of entrepreneurship. It is not as flashy as designing a logo or writing code, but it is the difference between building a hobby and building a business that lasts. Stay focused on the facts, keep moving, and prioritize the actual needs of the people you intend to serve over the ideas currently in your head. Successful founders are the ones who can look at their own assumptions and discard them when they no longer match the reality of the market.