Your first customers require obsessive, daily interaction to ensure the product works for them. Astronomer's founder spoke with their first managed Airflow customer four times a day for two months. This grueling process is essential for ironing out roadblocks and achieving product-market fit.

True product intuition isn't just from standard discovery calls. It's forged by directly engaging with customers' most urgent problems on escalation calls. This unfiltered feedback provides conviction and data-backed confidence for decision-making.

In the pre-product-market fit stage (the first ~20 deals), the sales leader's primary role is not just closing revenue, but acting as a product manager. They must be in every meeting to gather objections, find pockets of value, and translate raw market feedback into actionable insights for the engineering team.

Many founders mistakenly believe achieving product-market fit is the final step to explosive growth. However, growth only ignites after also finding a repeatable go-to-market fit, which translates the founder's initial sales success into a scalable process that a sales team can execute consistently.

Before building a product, create a pitch deck and have the sales team use it in real meetings. A lack of traction can reveal critical flaws not in the product idea, but in the go-to-market strategy, such as targeting the wrong buying center.

When a salesperson with a consistent track record of high performance suddenly struggles to close deals, the root cause is likely the product, not a sudden loss of skill. Use their performance as a litmus test for your product-market fit; their failure is a strong signal that something is fundamentally wrong with the offering.

When a clunky sales process fails, founders often incorrectly conclude their product isn't good enough and retreat to building more features. The real problem is typically the sales motion itself, which isn't aligned with customer demand. This leads to a cycle of building instead of fixing the sales process.

Sales are a vanity metric for product-market fit. The real test is having ~25 customers who have successfully implemented your product and achieved the specific ROI promised during the sales process. If you don't have this, you have a product problem, not a go-to-market problem.

Even with a productive sales team, founders should periodically run sales conversations. Jack Altman continued doing sales calls to stay connected to the market. It's the most direct way to understand what resonates with customers, what feels hard, and what lights them up, providing an unfiltered view of product-market fit.