Decoding Product-Market Fit: A Simple Guide

Nayan Kanaparthi
4 min readDec 18, 2023

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The term “Product-Market Fit” (PMF) is a omnipresent buzzword in the startup world, often tossed around without a comprehensive understanding. Let’s demystify this crucial concept and explore the keys to achieving it for sustained success.

Defining Product-Market Fit

“Product-Market fit means being in a good market with a product that can satisfy that market.”

According to Marc Andreesen, co-founder of Andreesen Horowitz, Product-Market Fit means being in a thriving market with a product that genuinely satisfies that market’s needs. In essence, a good market is not only large but also rapidly expanding. A fitting product should be capable of capturing substantial market share, resulting in customers eagerly purchasing your product, rapid usage growth, a burgeoning bank account, and an expanding team.

PMF is achieved when you’ve built a product that a lot of people want and are willing to pay for it. some of the few indicators in business terms of when you have achieved a product market fit would be

In business terms, several indicators signal the achievement of PMF:

- High user growth rate
- Low customer cost of acquisition
- High virality coefficient
- Low churn

When these factors align, gaining users becomes a seamless process.

Measuring Product-Market Fit

1) The 40% Test

This was introduced by Sean Ellis, an Expert Growth Hacker. so in this you basically ask your users a question i.e. “How would you feel if you could no longer use the product?” and they will be given 4 options Very disappointed, somewhat disappointed, Not disappointed, I no longer use this product.

If more than 40% of the users will be very disappointed if your product were to vanish tomorrow, it’s a strong indicator that you are close to PMF.

But, for this to be considered as an indicator, there must be at least few 100’s of users

2) Net Promoter Score (NPS)

This basically measures Customer Satisfaction. how your customers are promoting your product. that is people who spread word of mouth about your product and help garner more users in the process

and how to measure that?

first lets have a customer survey question that asks: How likely are you to recommend our product or service to someone you know? Score on a scale of 0 to 10, 0 being the lowest and 10 being the highest. and customers with scores are classified as follows

  • 0 to 6 — Detractors
  • 7 to 8 — Neutrals
  • 9 to 10 — Promoters

NPS = % of Promoters — % of Detractors

NPS score greater than 30 is considered great.

Product-Market Fit Across Business Models

Consumer Product:

- Usage 3 out of every 7 days
- Organic growth of around 100 signups/day
- 30% users active the day after sign up
- Clear path to 100,000 users

SaaS Products:

- 5% conversion from free to paid
- 3x CPA to LTV ratio (cost per acquisition to lifetime value ratio)
- <2% monthly churn rate

Introducing Product-Market-Founder-Fit (PMFF)

Getting a product to be really liked by customers might take a few months or even up to a year. If a startup is creating something that people really need in a big market, then doing the right things can lead to that likable status. But, for the product to keep being liked, or even get better, it needs a founder or a group of founders who are very determined to make it successful.

Product-Market-Founder-Fit (PMFF) is about how well the startup founder fits with making their product grow and get better. It looks at how much the person wants it to succeed and how good they are at managing the product. While Product-Market Fit shows if a startup has the potential to do well, PMFF shows a better chance of being successful for a long time. It’s mainly about how motivated the founder is to keep building, way after the start, the fundraising, and all the events that happen during the journey. In my experience, three things are really good signs of PMFF.

  • Personal Experience with the problem
  • Industry Understanding
  • Intrinsic motivation

PMFF is not a popularized term yet. Founder-Market Fit (FMF) is more widely known which essentially refers to point 2 here. However, I feel PMFF is a broader, more encapsulating concept to predict long-term success than Founder-Market Fit alone. It considers not just the ability of the founder to operate in a particular market, but also their capacity to drive the product to PMF and beyond.

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