Before building, founders in complex industries must deeply understand the operational rigor and nuances of their target vertical. This 'operator market fit' ensures the solution addresses real-world workflows, as a one-size-fits-all approach is doomed to fail.

When deciding between deepening a vertical, adding adjacent ones, or going horizontal, analyze two key factors: the extent of product modification needed and your ability to market and sell to the new audience. This framework simplifies a complex strategic choice.

Counter to the "niche down" mantra, Missive's horizontal approach became a key strength. With their largest customer segment representing only 6% of revenue, they are highly insulated from industry-specific downturns. This broad, long-tail customer base provides a stable and defensible foundation.

Most successful SaaS companies weren't built on new core tech, but by packaging existing tech (like databases or CRMs) into solutions for specific industries. AI is no different. The opportunity lies in unbundling a general tool like ChatGPT and rebundling its capabilities into vertical-specific products.

Traditional software required deep vertical focus because building unique UIs for each use case was complex. AI agents solve this. Since the interface is primarily a prompt box, a company can serve a broad horizontal market from the beginning without the massive overhead of building distinct, vertical-specific product experiences.

Resisting the temptation to be a 'jack of all trades' is crucial for profitability. Specializing deeply in one service establishes you as an undeniable expert, which allows you to command premium prices and deliver a superior experience that generalists cannot replicate.

Many founders fail not from a lack of market opportunity, but from trying to serve too many customer types with too many offerings. This creates overwhelming complexity in marketing, sales, and product. Picking a narrow niche simplifies operations and creates a clearer path to traction and profitability.