The advice that a non-technical founder must find a technical co-founder is repeated so often it is rarely examined. Sometimes it is right. Frequently it produces a rushed partnership with someone barely known, holding a large share of a company for a long time.
Equity is permanent and expensive
Twenty or thirty percent to a co-founder is the largest cheque you will ever write, paid over the entire life of the company. It should buy shared risk and years of judgement, not the first six months of building — which is what people often actually need and could buy far more cheaply.
A co-founder is a decade-long marriage. Do not enter one to get version one shipped.
Separate the two needs
Needing someone to build the product and needing someone to own technical direction for a decade are different requirements. The first can be met by hiring or partnering. Only the second justifies co-founder equity, and confusing them is the most common and costly error here.
Work together before committing
Nobody would marry after two coffees, yet co-founder agreements are signed on that basis routinely. Run a paid project together for two or three months first. You will learn how they handle disagreement, deadlines and being wrong — none of which is visible in conversation.
Vesting protects both of you
Four years with a one-year cliff is standard for good reason. It protects the company from someone leaving early with a large stake, and it protects the joiner from being pushed out after building the foundation. Anyone reluctant to vest is telling you how long they expect to stay.
The fractional CTO option
An experienced engineer for one or two days a week, providing architectural judgement, hiring help and vendor evaluation, without equity or a full salary. For many early companies this covers the actual gap — someone to tell you when a plan is wrong — at a fraction of the cost.
Write down what you each own
Whatever the arrangement, record who decides what: product direction, technical architecture, hiring, spending. Most founder disputes are not about effort or equity; they are about an unspoken assumption that both people were making the same decision. Writing it down early costs an hour.
