UzCombinator
UZ
EN
Startup School
Curriculum0/19
Module 1
Idea and problem
  1. 1What a startup is, and how it differs from a small business4 min
  2. 2Finding a real problem4 min
  3. 3Judging an idea: market, timing and team4 min
  4. 4Co-founders and the team4 min
Module 2
Customers and validation
  1. 5How to run a customer interview5 min
  2. 6Who your first users are4 min
  3. 7Testing demand cheaply5 min
Module 3
Building the MVP
  1. 8What an MVP is, and what it is not4 min
  2. 9Building fast: code, no-code and ready-made tools4 min
  3. 10Launching and collecting feedback4 min
  4. 11Signs of product-market fit4 min
Module 4
Growth and metrics
  1. 12Choosing the metric that matters4 min
  2. 13Unit economics: CAC, LTV and margin4 min
  3. 14Your first growth channels4 min
  4. 15Keeping your users4 min
Module 5
Fundraising and pitching
  1. 16Do you need funding? Stages and sources4 min
  2. 17Building a pitch deck4 min
  3. 18Meeting investors4 min
  4. 19Terms and valuation basics4 min
Module 3Lesson 114 min

Signs of product-market fit

Building the MVP
The numbers and user behaviour that show a product has found its market.
"Product-market fit" means a product and its market fitting each other. Reaching it is one of the most important milestones in a startup's life. Before it, the main job is to change the product and learn from customers. After it, the focus shifts to growth, to building the team and to putting processes in order.

What it means

With product-market fit, the market pulls the product towards it. You do not fight to persuade each customer; instead, demand grows faster than your ability to deliver. Customers come by themselves, use the product regularly and tell others. Without it everything is hard: sales are slow, users drift away, and every new customer takes a huge effort.
There is no sharp line here. It is not a yes or a no, but a state that gets stronger gradually. You can still spot the signs.

Strong signs

  • Users come back without reminders. The product has become part of their routine.
  • If the product disappeared, people would be genuinely upset and would look for a replacement.
  • A noticeable share of new customers arrive through recommendations.
  • Selling gets easier: conversations get shorter and objections fewer.
  • The rate at which customers leave falls and levels off.
  • Customers ask to use it more widely: more staff, more branches, more features.

Misleading signs

  • Press coverage and awards. They are nice, but they say nothing about how customers behave.
  • The number of people who signed up but do not use the product.
  • Praise from friends and acquaintances.
  • Interest from investors alone. Investors make mistakes too, and often look at other things.
  • Growth that came from a big discount or a free offer. When the price returns to normal, that growth may stop.

How to measure it

The most reliable measure is retention. Track what share of the users who joined in a given month are still active one, two and three months later. If that line falls to zero over time, the product has not found its market yet. If it levels off at some point, you are giving real value to someone. We cover this in detail in module four.
Another simple method is to ask active users: "How disappointed would you be if you could no longer use this product tomorrow?" If the share who answer "very disappointed" grows over time, you are on the right track. Asking different groups this question also tells you who needs the product most.

With business customers

If you sell to companies, the signs look a little different: do pilots turn into paid contracts, do customers renew, do they extend use to other departments or branches? What matters is not one large customer's interest, but a result that repeats across several customers of the same kind.

If you do not have it yet

That is normal; most startups stay at this stage for a long time. There are several ways forward:
  • Narrow the group. Perhaps the product is not for everyone, but fits one particular kind of customer very well.
  • Talk to users who left. They will tell you the most painful but most useful truths.
  • Re-examine the problem. Sometimes the problem is right but the solution is wrong, and sometimes the other way round.
  • Simplify the product. Often users never reach the core value because the path is too long.
Do not spend large sums on advertising before you have product-market fit. It is like pouring water into a leaking bucket: the more customers you bring in, the more of them flow out.

After product-market fit

Once the product has found its market, the job changes. The main question becomes how to keep up with demand: hiring, putting processes in order, strengthening customer support. But do not stop talking to customers. Markets change, competitors appear, and today's fit can weaken tomorrow. Many companies found product-market fit once and then lost it. Check it again every quarter.

Try this

Take the list of strong signs above and assess honestly where you stand on each. For every sign, write down what number or evidence you have. If the only evidence is a feeling, plan how you will measure it.