I'm a solo founder six months into developing a B2B SaaS tool for small architecture firms, and while I have a handful of enthusiastic pilot users, I'm struggling to define whether we've truly achieved product-market fit or if we're just pleasing a small niche. My key metrics are inconsistent, and I'm unsure how to systematically gather the right qualitative feedback to guide our next development priorities. For founders who have navigated this ambiguous phase, what specific signals or customer interview techniques did you rely on to move from anecdotal validation to a confident, data-informed understanding of fit?
First, pick a north star metric that actually matters for growth. For many B2B SaaS teams, that’s time-to-first-value and the rate of expansion. Then choose 2–3 leading indicators you can influence in short cycles: activation rate (what percentage of pilot accounts complete a core task within the first week), engagement depth (average number of key features used per account per week), and expansion/renewal momentum (additional seats or modules after trial). Run a 4–6 week pilot with 5–10 accounts, pair quantitative signals with short interviews (15–20 minutes), and decide if you’re seeing scalable demand or just a niche interest. If pilots convert and stick, you’re closer to product-market fit.