Part VI · Chapter 14 · Founding · lesson 3

What fit feels like, and what it does not

11 min

Builds on Why customers stay, and what churn does to everything

Two businesses did 40,000 last month.

The first spent three weeks of founder time and 9,000 on advertising to get there, and will have to do all of it again in April. Every customer arrived because somebody pushed them.

The second answered the phone. Support is behind, the pricing is wrong, two customers are annoyed that a feature broke, and nobody has done any marketing since January.

Same revenue. Only one of them has a business yet.

Fit is when demand stops being something you generate and starts being something you handle.

It is defined by an absence rather than a presence. The absence of pushing. Customers arrive without being convinced, stay without being retained, and complain loudly when the thing breaks, because it has become part of how they work.

Before fit, effort produces customers and stopping produces silence. After fit, effort produces capacity, and the constraint moves from finding people to serving them.

What it actually looks like

Nobody experiences fit as an announcement. It shows up as a set of small operational irritations, all of which are the good kind.

Retention flattens instead of decaying. People who started three months ago are mostly still there. This is the single most informative number a young business has, and it cannot be bought.

Customers arrive from other customers. Not a referral programme — someone mentioned you to a colleague because mentioning you made them look useful.

The sales conversation gets shorter. Fewer objections, less explaining, more questions about how to start rather than why to start.

Things break and people mind. An outage that generates angry messages is better news than an outage nobody noticed.

You are the bottleneck. Support, delivery, onboarding — something is behind, and it is not sales.

What it looks like when it is not there

The false signals are all things that can be produced with money, effort or charm, which is precisely the problem: you control them, so they measure you rather than the market.

Press coverage. A large waiting list. A launch spike. Growth that tracks the advertising budget exactly, one month behind. Users who are enthusiastic and do not return. A single customer who loves it and represents nobody.

Predict

Which single measurement best separates a business with fit from one without?

Month-on-month revenue growthWhat fraction of a cohort is still active several months after joiningTotal number of registered usersHow satisfied customers say they are

Not the same thing

Push

Demand exists because you generated it. Remove the effort and the demand goes with it.

Measured in: Cost and founder hours per customer acquired
For example: Every customer this month came from advertising or from a conversation you personally had.
Chase it alone and: It works, so it hides the diagnosis. A well-run push looks like a growing business right up until the money or the founder runs out.

Pull

Demand exists independently of your effort. Remove the effort and it continues, slower.

Measured in: Share of new customers who arrived without being contacted
For example: Three of last month's eight customers were sent by existing ones and had already decided before the call.
Chase it alone and: It can be narrow. Pull inside one small segment is real and can be mistaken for pull in general, which is how businesses stall at a size nobody expected.

Which is which? Put each one on a side.

A spike in signups the week after a large publication wrote about you
Customers asking whether they can pay annually instead of monthly
Revenue rising in proportion to the advertising spend, reliably
A customer complaining bitterly that a feature broke on a Sunday

Fit is with a market, not with the world

The phrase has two halves and people only ever hear the first.

A product fits a specific set of people with a specific problem. The same product can have overwhelming fit with two hundred logistics operators and none at all with anybody else, and both of those are true at the same time.

This has an awkward consequence. Finding fit tells you which market you are in, and that market may be smaller than the one you set out to serve. Businesses that have found real fit in a narrow segment routinely spend a year trying to prove they found it in a wide one, and the year is spent pushing.

Check

A business has flat retention, customers arriving by word of mouth, and revenue of 12,000 a month that has not grown in five months. What is the most likely situation?

Real fit with a segment that is nearly saturatedNo fit — a business with fit would be growingThe pricing is too lowMarketing has been neglected

Fit is perishableOptional

It is treated as a milestone — reached once, held forever. It is closer to a position that has to be defended.

Markets move. The problem that justified the product gets solved another way, or stops existing, or a larger competitor includes an adequate version for free. Customers who once arrived by themselves start needing to be convinced again, and the business quietly returns to pushing without anyone deciding to.

The symptom is a slow rise in the cost of acquiring a customer, over years, with no single month where anything went wrong. It is the most easily missed decline there is, because every individual month looks like the last one.

Worth remembering

Fit is the absence of pushing: demand stops being something you generate and becomes something you handle.
Retention across a cohort is the hardest signal to manufacture and therefore the most informative one.
False signals all share a property — press, waiting lists and launch spikes can be produced by effort or money.
The diagnostic is to stop pushing for a fortnight and see what continues.
Fit is with a specific market, it can be narrow, and it decays if the market moves.