Win-loss interviews are one of the few ways to get honest feedback about why a prospect chose you or your competitor. Most teams assume they need to hire a consultant to do this right. They don't. You can run effective interviews yourself if you follow a basic structure and resist the urge to sell during the call.
Why you should interview both wins and losses
Most teams only debrief losses. That's a mistake. A loss tells you what went wrong. A win tells you what actually persuaded someone to sign—and it's often different from what you think. Your sales team might credit the product roadmap, but the customer chose you because your support team responded faster than the competitor's. You need both perspectives to avoid building on false assumptions.
Aim to interview 10-15 customers per quarter: roughly a 60/40 or 70/30 split between wins and losses. This gives you enough patterns to act on without becoming a full-time research operation.
Structure that actually works
The interview should last 30-45 minutes. Send the questions in advance so the customer isn't blindsided. Use a neutral opener: "We're gathering feedback on why customers choose different solutions. I'd like to understand your process and what mattered most to you." Not: "Why didn't you pick us?"
Ask in this order:
- The problem they were solving. "What was broken or missing before you started looking?" This anchors the conversation in their reality, not yours.
- The solutions they considered. "Who else did you evaluate?" Get specific names. If they say "a few vendors," push gently: "Can you name them?"
- How they compared them. "What were your main evaluation criteria?" Listen for what they prioritize, not what you assumed they would.
- The deciding factor. "What was the thing that tipped the decision?" This is where you get gold. It's rarely the headline feature.
- What almost changed their mind. For wins: "What concerns did you have?" For losses: "What would have needed to be different for us to win?" Specificity matters here.
Write down what they say. Record the call if they agree, but don't rely on the recording to catch nuance later. Your notes in the moment are better because you can flag what surprises you.
What kills these interviews (and how to avoid it)
The biggest mistake is arguing or correcting. If a customer says your product can't do something it actually can, don't interrupt to correct them. Note it and move on. They perceived it as a limitation. That's the real insight. You can follow up by email later if it matters.
The second mistake is asking leading questions. "You must have loved how easy our onboarding was, right?" will get you a polite yes. Instead: "Tell me about the onboarding experience." Then shut up and listen.
The third is treating the interview as a sales call. This kills trust. If a loss customer senses you're trying to reopen the deal, they'll give you safe, generic answers. Your only goal is understanding. That's it.
Turning interviews into action
After 10-15 interviews, you'll start seeing patterns. Maybe three customers mention that your competitor's pricing is more flexible. Maybe five say your sales process felt slow. Maybe four wins cite your integrations as the deciding factor, but your sales team never mentioned it.
Share these patterns with your team. Not anecdotes—patterns. "We've heard from five customers that X was important. Our team is emphasizing Y. Let's talk about that gap." This shifts conversations from opinion to evidence.
Document your findings in a simple template: problem statement, what customers evaluated, key decision criteria, and what surprised you. Revisit it quarterly. Over time, you'll build a real picture of how the market sees you versus the alternative.
If you want to formalize this process—tracking interviews, spotting patterns across quarters, and comparing your positioning to what competitors are actually saying in the market—tools like Canopy can help you layer in broader competitive intelligence. But the interviews themselves? Those come from you, directly, with discipline and listening.