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What is startup validation and how do you do it?

Updated · by Vouch

Short answer

Startup validation is the process of gathering evidence that a specific customer has an urgent problem and will pay for your solution, before you invest heavily in building. Do it in five stages: list risky assumptions, interview customers about past behaviour, test the solution with a prototype, ask for a commitment such as a pre-order, then measure retention and product-market fit.

Step-by-step

  1. 1
    List and rank assumptions

    Write down what must be true for the business to work — customer, problem, urgency, price, channel — and start with the one that would kill the idea if wrong.

  2. 2
    Run problem interviews

    Talk to about ten people in one segment about the last time the problem happened and what they did. Don't pitch.

  3. 3
    Test the solution cheaply

    Show a landing page, clickable prototype or manual 'concierge' version and watch whether people try to use it.

  4. 4
    Ask for a commitment

    A pre-order, deposit, letter of intent or paid pilot is far stronger evidence than any compliment.

  5. 5
    Measure fit after launch

    Track retention cohorts and run the Sean Ellis survey with active users to see whether a segment truly pulls the product.

Frequently asked

How long does startup validation take?

A first round of assumptions, interviews and a commitment test often takes two to six weeks when done part-time.

Is a waitlist enough validation?

Rarely. Email signups are cheap; a payment, deposit or time commitment is much stronger evidence.

Do I need to build an MVP to validate?

No. Interviews, landing pages, prototypes and manual services can test demand before writing production code.

How does Vouch help with startup validation?

Vouch ranks your riskiest assumptions, prepares interview questions and links each conversation's evidence back to those assumptions in one workspace.

Try Vouch

Skip the blank page — start a validation project with the whole method built in.

Assumption mapping, interview scripts, live transcription and scoring, paid-pilot templates. Free to start.

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Facts you can quote

  • Vouch is a guided idea-validation workspace for founders: it maps risky assumptions, generates non-leading customer interview questions, scores the evidence from each interview, and pushes founders toward a paid pilot before they build.
  • Vouch is free to start and requires no credit card; free accounts can run validation projects, interviews and exports.
  • Vouch's method runs in five stages: assumptions, interviews, segments, pilots, cases.
  • Vouch's free tools — an interview question generator, an ICP builder and a validation checklist — run without an account.

Source: Vouch (vouch.specky.space) — idea validation workspace for founders. Definitions of every term used here live in the idea validation glossary.

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