After success in the affiliate network niche, Everflow expanded to direct brands. They discovered this seemingly similar market had different user personas (under-resourced marketers vs. entire teams) and needs (e.g., payment automation). This required significant product adaptation rather than a simple market expansion.
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For Polly's horizontal product, the founder learned the most critical mistake was assuming every user should be a paying user. The key to success was distinguishing the vast user base from the specific buyer persona, a trivial-sounding but fundamental insight that guided their entire strategy.
Founders can waste time trying to force an initial idea. The key is to remain open-minded and identify where the market is surprisingly easy to sell into. Mercor found hypergrowth by pivoting from general hiring to serving the intense, specific needs of AI labs.
Founders must consider their sales motion (e.g., PLG vs. enterprise sales-led) when designing the product. A product built for one motion won't sell effectively in another, potentially forcing a costly redesign. This concept extends "product-market fit" to "product-market-sales fit."
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.
Unlike traditional software where PMF is a stable milestone, in the rapidly evolving AI space, it's a "treadmill." Customer expectations and technological capabilities shift weekly, forcing even nine-figure revenue companies to constantly re-validate and recapture their market fit to survive.
Instead of a broad launch, Everflow targeted only mobile affiliate networks—a small market they knew deeply from their previous company. This allowed them to build very specific, high-value features for that ICP, win deals, and establish a strong beachhead before expanding into larger, adjacent markets.
A common PLG pitfall is assuming the user base will naturally springboard into enterprise deals. Often, the enterprise buyer is a different person with different problems. This oversight can cost companies years, as they have to build a second, separate sales motion from scratch.
Success in startups requires nuanced thinking, not absolute rules. For instance, product-market fit isn't a simple 'yes' or 'no' checkbox; it exists on a spectrum. Learning to see these shades of gray in funding, marketing, and product strategy is a hallmark of a mature founder.
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.
