At its Series A, ServiceUp had "concept-market fit"—the core idea was compelling enough to attract investors and early customers—but not yet product-market fit. The product didn't fully solve the problem, but the vision was strong enough to secure the capital needed to continue building towards it.

Product-market fit isn't just growth; it's an extreme market pull where customers buy your product despite its imperfections. The ultimate signal is when deals close quickly and repeatedly, with users happily ignoring missing features because the core value proposition is so urgent and compelling.

You've achieved product-market fit when the market pulls you forward, characterized by growth driven entirely by organic referrals. If your customers are so passionate that they do the selling for you, you've moved beyond just a good idea.

Founders must distinguish between persistence and fighting a losing battle. If you constantly feel like you're pushing a boulder uphill to convince the market, you're on the wrong path. Genuine product-market fit feels like the market is pulling you, and your job is to sprint to keep up.

A visionary founder must be willing to shelve their ultimate, long-term product vision if the market isn't ready. The pragmatic approach is to pivot to an immediate, tangible customer problem. This builds a foundational business and necessary ecosystem trust, paving the way to realize the grander vision in the future.