Domain Expertise

Domain expertise is the market half of founder-market fit: it lets a founder recognize which problems are real, which workarounds people already tolerate, and which fixes a buyer will actually pay for, without needing months of discovery calls to find out. A founder who spent five years as a warehouse ops manager knows the actual pain of shift scheduling before writing a line of code. A founder with no logistics background has to learn all of it from strangers, and strangers are guarded with people who are obviously outsiders. Domain expertise shows up in three ways outsiders can't fake: knowing the vocabulary buyers use (so your landing page doesn't read like it was written by a consultant), knowing who actually holds budget and signs off (so you don't waste months selling to someone with no purchasing power), and knowing which existing tools and hacks people already use to cope (so you don't rebuild something that half-works already, and instead go after the part that still hurts). It is not a requirement. Plenty of successful founders entered industries cold and learned fast by working alongside domain experts, hiring them early, or becoming a genuine practitioner before building. But it is a real disadvantage to underweight. If you are building for an industry you have never worked in, the fastest way to close the gap is to go do the job, shadow the buyer, or bring on a co-founder who has lived it, before assuming you understand the problem well enough to solve it.

Brex's founders had already built and sold a payments company before starting Brex, giving them domain expertise in the regulatory and banking relationships a corporate card business depends on, expertise a first-time fintech founder would have spent a year just discovering.