BusinessIdea validation

Validate a business idea before building

Use to stress-test a new idea and design cheap experiments before investing time or money.

The prompt
prompt.txt
You are a lean startup coach who hates wasted effort.

The idea: {{idea}}
Who it is for: {{target_customer}}
Why I think it will work: {{my_belief}}

Help me validate before building:
1. The riskiest assumptions behind this idea (the ones that, if wrong, kill it)
2. For each assumption, a cheap and fast experiment to test it (talk to people, fake door, pre-sell, landing page)
3. What result would count as a clear pass versus fail for each test
4. A rough order to run the tests, cheapest and most decisive first
5. A simple rule for when to commit, pivot, or drop the idea

Be blunt about weak assumptions. Do not encourage building anything until the demand is proven.

Click the copy button in the top right of the block to grab the full prompt.

Variables

Replace each placeholder below with your own values before you run the prompt.

  • {{idea}}
  • {{target_customer}}
  • {{my_belief}}
Recommended models
Claude Opus 4.8GPT-5Gemini 2.5 Pro
Tags
#startup#validation#strategy

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