Understanding Product Market Fit.

Shubham Mutha
3 min readMay 20, 2024

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In the world of startups and product development, achieving product/market fit is crucial for success. It’s the point where you’ve created a product that resonates with your target market and solves a real problem. One popular method for assessing product/market fit is the Sean Ellis Test, named after entrepreneur and marketer Sean Ellis.

What is the Sean Ellis Test? The Sean Ellis Test is a simple survey that aims to quantify how well your product satisfies your customers’ needs. It consists of a single, straightforward question:

How would you feel if you could no longer use the product ?

Respondents can choose from the following multiple-choice options:

  • Very disappointed
  • Somewhat disappointed
  • Not disappointed (it isn’t really that useful)
  • N/A — I no longer use the product

The key metric to focus on is the percentage of respondents who answered “Very disappointed.”

Interpreting the Results: According to Sean Ellis, if 40% or more of your respondents answer “Very disappointed,” you’ve likely achieved product/market fit. This benchmark indicates that a significant portion of your user base finds your product truly valuable and indispensable.

If less than 40% of respondents select “Very disappointed,” it suggests that your product may not be solving a critical need for your target market, and you may need to reevaluate your product strategy or target audience.

Using the Sean Ellis Test: The beauty of the Sean Ellis Test lies in its simplicity. It’s easy to implement and can provide valuable insights into your product’s market fit. Here are some tips for using the test effectively:

  1. Timing: Send the survey to your existing customers or users who have been using your product for some time already. This ensures they have had enough experience with your product to give a well-informed opinion.
  2. Segmentation: Divide your survey responses into different groups based on factors like the customers’ age, location, how often they use your product, or what type of subscription plan they have. This can help you identify which specific groups of customers are really satisfied with your product and which groups may need some improvements.
  3. Follow-up: For the customers who say they would be “very disappointed” if they couldn’t use your product anymore, ask them some additional open-ended questions. This allows you to get more detailed feedback on what exactly they find most valuable or useful about your product.
  4. Continuous monitoring: Checking if your product meets your customers’ needs is not a one-time activity. You need to keep monitoring and evaluating this regularly, especially when you add new features, enter new markets, or when your customers’ needs start changing over time.

In simple terms, the key points are: survey your existing users who have good experience with your product, analyze responses from different customer groups, get deeper feedback from highly satisfied customers, and keep repeating this process regularly as things evolve.

Limitations and Considerations: While the Sean Ellis Test is a valuable tool, it’s important to recognize its limitations and use it in conjunction with other product development and market research methods. The test provides a quantitative measure of perceived value, but it doesn’t offer insights into specific areas for improvement or new feature ideas.

Additionally, the 40% benchmark is a general guideline and may not apply universally to all products or markets. Some successful products may achieve lower “Very disappointed” rates but still have a loyal customer base.

Conclusion: Achieving product/market fit is a critical milestone for any product-focused business. The Sean Ellis Test provides a simple and effective way to gauge how well your product resonates with your target market. By regularly administering the survey and analyzing the results, you can gain valuable insights to inform your product strategy, prioritize improvements, and ultimately drive greater customer satisfaction and business success.

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