ChatGPT Prompts for Startups: 12 Founder Validation Prompts

ChatGPT prompts for startups are most useful at the stages where founders guess too much: deciding whether the problem is real, talking to customers, choosing cheap tests, and reporting progress honestly. Use the 12 prompts below to validate an idea, run customer discovery, outline a pitch, and write investor updates, always from the evidence and numbers you paste in. They do not replace legal, tax, or investment advice.

Prompts for validating the idea

1. Assumption map

My idea: [idea]. Target customer: [customer]. Evidence so far: [evidence with counts]. List 6 to 8 assumptions across problem, customer, solution, pricing, and channel, and rate each high, medium, or low risk based on my evidence.

2. Riskiest assumption test

For assumption [assumption], suggest the cheapest test I can run in [N] days with [budget]. Give the metric and ask me to set a pass line before I start.

3. Alternatives audit

My customers handle [problem] today with [alternatives]. For each, list what it does well, where it fails, and what I would have to beat. Use only what I describe; do not invent competitor facts.

Prompts for customer discovery

4. Past-behavior interview script

Write 8 interview questions for [customer] about the last time [problem] happened. Ask about past behavior and current tools only; no pitching and no "would you use this" questions.

5. Interview notes to patterns

Here are notes from [N] interviews: [paste]. Group what people said into problems, current workarounds, and buying signals, with how many interviews mention each. Quote exact words only.

6. Recruiting message

Write a short, honest message asking [customer role] for a 20-minute call about how they handle [problem]. Say I am not selling anything yet.

Prompts for building and launching

7. Concierge MVP plan

Design a concierge version of [idea] that I deliver by hand for [N] customers for [weeks]. List the steps I do manually, what I measure, and when to stop.

8. First pricing test

Suggest 3 ways to test whether [customer] will pay for [solution] within [budget], such as a paid pilot or pre-order. For each, what counts as a yes.

9. Launch week checklist

I launch [product] to [audience] on [date] through [channels]. Make a day-by-day checklist for the week before and after, using only these channels.

Prompts for fundraising and updates

10. Pitch deck outline

Outline a 10-slide pitch deck for [startup] using only these facts: [problem, solution, traction numbers, team, ask]. Mark any slide where I am missing evidence instead of filling it in.

11. Monthly investor update

Write a monthly investor update from these numbers and notes: [metrics, wins, misses, asks]. Sections: highlights, metrics, lowlights, asks. No rounding up and no metrics I did not give.

12. Go, pivot, or stop review

Here are my test results: [results] and the pass lines I set: [pass lines]. Tell me which assumptions passed or failed and what my own decision rule says to do next.

Run a two-week validation sprint

The flagship Startup Validation Sprint from Idea, Customer, and Evidence turns your idea and evidence into an assumption map, an interview script, a two-week test plan, a decision rule, and an evidence ledger. Its example tests a reminder and rebooking tool for independent vet clinics with 7 interviews, $300, and 15 hours.

Related prompts

When you are ready to raise, use the Startup pitch deck architect and keep investors informed with the Monthly board and investor update memo. Map the whole business with the ChatGPT prompt for business model canvas, and plan your launch with the 30-day product launch plan.

Related: ChatGPT prompts for small business owners.

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