The conversations to have before you build together

Compare the lives you are each trying to build

Founders often begin with product excitement and postpone the personal questions. Start with the opposite. Ask what each person wants their life to look like in three years, how much financial risk they can take, and what success would mean if the company never becomes venture-scale.

Two talented people can want incompatible outcomes. One may want a durable, profitable company while the other wants rapid fundraising and an aggressive exit. Neither ambition is wrong, but ambiguity becomes expensive once employees and investors are involved.

Make commitment concrete

Replace phrases like ‘all in’ with specific commitments. Discuss weekly hours, the date each person can leave other work, personal runway, salary expectations, location, and responsibilities outside the company.

If someone cannot commit full time yet, define the milestone that changes that arrangement. A clear part-time phase is healthier than two people silently operating with different definitions of urgency.

• When can each founder work full time?
• How many months can each person operate without salary?
• What responsibilities are genuinely non-negotiable outside the company?

Define roles—and what happens when roles overlap

Titles matter less than decision ownership. List the recurring decisions across product, engineering, hiring, sales, finance, and fundraising. Give each domain a clear owner while preserving a process for high-impact decisions that require both founders.

A technical and commercial pairing can be complementary, but do not assume the labels resolve every question. Product direction, customer promises, and hiring priorities frequently cross the boundary.

Discuss equity after discussing contribution and risk

Equity should reflect the partnership you are building, not reward whoever first described the idea. Consider ongoing commitment, relevant assets, opportunity cost, capital contributed, and the responsibilities each person will carry.

Use vesting. Agree on what happens if someone leaves, becomes unable to work, repeatedly misses commitments, or wants to sell shares. A founder agreement does not signal distrust; it protects the relationship from predictable ambiguity.

Run a project before forming the company

The best co-founder interview is a demanding piece of work. Spend several weeks interviewing customers, building a prototype, or selling a small pilot together. Notice how each person handles uncertainty, criticism, deadlines, and unglamorous tasks.

After the project, hold a retrospective. Ask what created energy, what caused friction, and whether you would willingly repeat the experience. Compatibility is not the absence of disagreement; it is the ability to turn disagreement into a better decision.