Achieving Product-Market Fit for Startups: Key Signals and Retention Metrics
Product–market fit is not a vibe — it is a measurable point where a specific audience keeps using, loving, and paying for what you have built. Founders feel it when growth shifts from push to pull: cohorts stop churning to zero, word of mouth drives sign-ups, and users complain loudly when something breaks because they now depend on you. This guide breaks PMF into hard signals and retention metrics — from flattening cohort curves and NPS scores to LTV:CAC and expansion revenue — so you can separate genuine traction from paid acquisition spikes and wishful thinking.
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