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Solo Founders: How to Decide What Not to Build

Treat ideas as candidates, not commitments. Tie each one to a business or customer outcome, check the evidence, estimate its effort and opportunity cost, and decide whether to build, test, defer, or decline it.
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Decide what not to build by comparing each idea with your current business goal, the evidence that customers need it, the effort it will take, and the better work it would displace. Keep a list of ideas, but treat it as a record—not a promise. Build only when the likely outcome justifies the time.

Start with the outcome, not the feature

Before evaluating a proposed feature, name the customer problem or business result it is meant to change. That might mean helping more prospective customers become paying users, improving activation, or resolving a recurring problem for existing customers. The right measure depends on your business; no single KPI suits every solo founder.

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Y Combinator’s Startup School recap on prioritizing time recommends connecting tasks to a primary KPI, such as revenue or active users. The point is not to force every task into a number, but to make its intended effect clear enough to assess.

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Use evidence to separate a real need from an appealing idea

A request is useful evidence, but one request alone does not prove that a feature should be built. Look for repeated problems, ask users about what they are trying to accomplish, and pay attention to what they do as well as what they say. Your own enthusiasm is not evidence of customer demand.

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Adora Cheung, identified as a YC partner in the Startup School session, put the risk plainly: “A very common mistake technical founders make is to build things first, and then go talk to users.” Treat that as advice from the session, not a measured finding.

If demand is uncertain and implementation would be expensive, test the assumption with a smaller step first. For example, a Hacker News participant described using a landing page and manual service to gauge demand before building. That is one founder’s account, not a guarantee that the same test will fit every product.

Compare candidate work on the same axes

YC’s framework compares expected impact with the time or complexity required. For a solo founder, the comparison is most useful when it also makes evidence, opportunity cost, and fit with the product’s core job visible.

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Axis Question to ask
Outcome impact Which customer or business outcome should change, and how likely is this work to change it?
Evidence What have users said or done that supports the need? Can the uncertain assumption be tested cheaply?
Complexity and time How much work is required, and can you complete it with the capacity available?
Opportunity cost What more valuable work—such as talking to users, selling, or delivering something already promised—would be delayed?
Fit with the core job Does this improve the main outcome users came for, or add complexity mainly for an edge case?

High-impact work that is relatively easy to complete will often outrank work that is both uncertain and demanding. But a low-effort feature is not automatically worthwhile: it still needs a plausible connection to an outcome. Indie Hackers participants have described resisting additions that increase complexity or maintenance without improving the user’s core result; these are individual opinions, not measured findings.

A practical decision process for a solo founder

  1. Record the idea. Note who raised it, which users or segment it affects, the problem they are trying to solve, and what evidence you have. Recording an idea does not commit you to build it.
  2. Connect it to one current goal. State the outcome it could change, such as acquiring paying customers, improving activation, or fixing a recurring customer problem.
  3. Check how strong the evidence is. Talk with users and distinguish a repeated problem from an isolated request or your own preference. If the need remains uncertain, look for a smaller, cheaper test.
  4. Estimate impact, effort, and displacement. Compare the likely effect and required time with the other work available. Include what you would have to postpone to take this on.
  5. Choose a disposition. Work on it now, defer it for review, test it more cheaply, or decline it. Explain a deferral honestly rather than implying the request is already scheduled.
  6. Review the list against your goal. Cheung recommends a weekly review in the YC recap. Use that cadence if it fits your work; the essential point is to make review deliberate rather than letting every new idea interrupt the current plan.
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What “not now” protects

For a founder working alone, every feature competes with other ways to make progress. Time spent implementing an uncertain edge case may be time not spent speaking with customers, making a sale, or completing work tied to a clearer need. A roadmap and a stream of shipped features are not proof of impact; judge them by whether they moved the outcome they were meant to change.

The Product Hunt forum listing is available at Product Hunt Forums, but the discussion named in the supplied title could not be located. The process here therefore does not attribute advice, a date, or an author to that thread. It draws on the official YC session recap and clearly identified community discussions instead.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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