A great founding engineer may not be the right person to be CTO of a larger team. Recognizing this misfit can lead to a mutual, amicable departure where the exiting co-founder retains their fully vested equity, preserving the relationship and acknowledging their early contribution.

To avoid building a company for a quick sale, Semafor's founders made a 10-year commitment to each other. They then embedded this philosophy into the company's structure by putting all employees and shareholders on a 10-year vesting schedule, aligning the entire organization for long-term, durable growth.

Don't default to a 50/50 split on day one. Instead, agree to formally discuss equity only after reaching a predefined milestone, like $10,000 in revenue. This allows you to base the split on demonstrated contribution and commitment, avoiding the resentment from premature, misaligned agreements.

A co-founder's deep equity stake and personal identity being tied to the company creates unparalleled ownership. This incentive alignment makes them default-to-fix problem solvers, whereas an employee's default response to extreme difficulty might be to leave.

De-risk bringing on co-founders by first hiring them as key employees. Grant ownership over time based on hitting specific milestones, creating a trial period to assess fit and contribution before making a permanent, expensive commitment to an equity partner.

Without a formal partnership agreement defining roles and expectations, a co-founder can cease contributing while retaining significant equity. This leads to difficult negotiations and rewarding non-performance upon an exit.

For a high-skill service business, the biggest barrier to scaling is finding autonomous, high-quality employees. To retain this crucial talent and prevent them from leaving to start a competing business, founders should offer an equity stake that vests over a long period (e.g., 5-6 years), aligning their incentives with the company's long-term growth.

Granting a full co-founder 50% equity is a massive, often regrettable, early decision. A better model is to bring on a 'partner' with a smaller, vested equity stake (e.g., 10%). This provides accountability and complementary skills without sacrificing majority ownership and control.

The Rainmaking startup studio had founders vest their personal equity into a shared holding company. This created an "insurance" policy where one founder's success benefited the entire group, allowing them to pursue passion projects while mitigating the financial risk of individual failure.