our first ten customers saved the company. our next thirty almost destroyed it.

first ten customers came from our network. founders, operators, people who knew us, trusted us, gave us honest brutal feedback. they shaped everything. we built fast, iterated constantly, felt like we really understood our market.

then we opened things up.

next thirty customers came through proper acquisition channels. different backgrounds, different expectations, different definitions of success. support tickets tripled. onboarding calls got longer and harder. the setup that worked perfectly for our first cohort confused almost everyone in the second one.

we spent six months convinced it was a product problem. hired two engineers to fix issues that kept appearing. built features we thought would solve the friction.

churn kept climbing.

then one of our original ten customers introduced us to someone outside our network. that person got onboarded in twenty minutes, hit value in day two, never submitted a single support ticket.

we got on a call with them and asked why it was so easy.

they described their workflow. it was almost identical to our first ten customers. completely different from our next thirty.

we had been building for the wrong cohort for six months without realising it.

how do you figure out which of your customers are actually the right ones before you've already built your product around the wrong ones?