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A startup is not a small version of a big company. It’s a different kind of organisation entirely - one operating under extreme uncertainty, trying to find a repeatable business model before it runs out of money. That context changes almost everything about how product work gets done 🚀

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What’s actually different

In an established company, the problem is mostly execution - you know what to build, you have customers, the challenge is building it well and scaling. In a startup, the problem is discovery - you don’t yet know if what you’re building is something people want, whether the business model works, or whether the market is big enough to matter. Eric Ries built The Lean Startup around this insight: startups need a different management approach because they’re not executing a known plan - they’re searching for one. The build-measure-learn loop is the method for that search.

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The product-market fit obsession

Everything in an early startup is subordinate to finding product-market fit - the point where a meaningful number of customers genuinely need what you’re building and would be disappointed if it disappeared. Before PMF, scale is dangerous. Hiring more people, spending on marketing, building more features - all of it amplifies a signal that may not exist yet 💡 The pretotyping and concierge test approaches exist precisely for this phase - validate demand before building, and build as little as possible to get a real signal.

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Startup PM vs. scale-up PM

In a small startup, the PM role often doesn’t formally exist - founders do product, sometimes alongside engineering and sales. As the company grows, dedicated PMs emerge, but the work remains different from a large company:
  • Less process, more direct customer contact
  • Faster cycles, higher tolerance for rough edges
  • More ambiguity about what to build and why
  • Greater proximity to revenue decisions
Marty Cagan’s Inspired is written primarily for product teams at scale, but his Transformed addresses the transition from startup to product-led organisation - the shift in mindset and process that’s required as companies grow 🙌

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The runway reality

Startups operate with a clock ticking. Runway - the amount of time before the money runs out - shapes every decision. A startup with eighteen months of runway makes different bets than one with three. Understanding the business context isn’t optional for a startup PM; it’s the water you swim in. Lesson learned: the biggest adjustment I’ve seen PMs struggle with moving from large companies to startups isn’t the pace - it’s the absence of certainty. There’s no established playbook, no guaranteed audience, no safety net. That’s also what makes it the best product school there is.