Nikesh Arora warns that founders often solicit feedback from large enterprise customers too early. These customers ask for "speeds and feeds," not a holistic product, leading founders to build features instead of a complete solution. The best founders first build a product based on their own end-to-end vision.

Founder Amanda Kahlow deliberately targeted large enterprise customers first for both her companies. This defies the common advice to start with SMBs. Her rationale: it’s easier to simplify an enterprise-grade product for smaller markets than it is to scale a simple product up.

Counterintuitively, Filevine discovered that larger customers were easier to work with. They were more sophisticated, had internal resources for implementation, and understood technical limitations. Smaller customers, in contrast, often had "beer money and champagne tastes" with unrealistic expectations.

There's an optimal stage for startup innovation. Companies are large enough for diverse customer feedback but small enough that product leaders are still interacting directly with clients. This tight feedback loop, where decision-makers hear problems firsthand, allows them to innovate faster than tiny startups (not enough data) or large corporations (too much bureaucracy).

Pursuing large "whale" customers for early validation is risky because they often come with heavy demands that can derail the product vision. Instead, seek out innovative, mid-level companies who are early adopters. They provide better feedback, and building traction with them opens doors to larger clients later.

For consumption-based models, simple size-based segmentation (SMB, Enterprise) is insufficient. Stripe and Vercel use a two-axis model: company size (x-axis) and growth potential (y-axis). A small company growing at 200% YoY is more valuable and warrants more sales investment than a large, stagnant one.

When prioritizing features, don't just ask what percentage of your current customers will use it. Sometimes, it's strategic to build features that very few existing users need, specifically because those features will attract a new, more desirable customer segment. This is a risk, but it's a calculated bet on moving your business upmarket or into a new vertical.

While building one-off features for large clients is risky, their requests can be a leading indicator for the market. Lattice CEO Jack Altman notes that like Shopify at Stripe, these clients can push your product in directions that prove valuable for many future customers, making it a strategic bet.

Counterintuitively, the best early customers are the most demanding. Their rigorous feedback is a gift that improves your product for everyone. Their reputation also serves as a powerful market signal, as industry peers know how good they are and will follow their lead.