Validate a startup idea
From 'I have an idea' to 'I know the riskiest assumption' in one afternoon.
2–4 hours across the four steps Founders and indie hackers with an unvalidated idea
Most startup ideas fail on demand, not execution — someone builds a good product for a problem nobody urgently has. This playbook front-loads the demand question. You will not write a business plan; you will write down your assumptions in a form that makes the riskiest one obvious, then sharpen it against what customers actually say.
Do the steps in order. Each one produces something the next step consumes, and the whole sequence fits in an afternoon if you already know the customer space.
- 1
Dump the idea onto a Lean Canvas
The Lean Canvas is built for exactly this moment: nothing is validated, everything is a hypothesis. Problem comes first, and the existing-alternatives line forces you to name your real competition (usually a spreadsheet or doing nothing).
Carry forward
Your top problem, your early-adopter description, and your scrappiest guess at an unfair advantage. Mark every block that is a guess rather than a fact — that list is the point.
- 2
Talk to five people, then synthesise with an Empathy Map
Between steps, have real conversations with people who match your early-adopter block. The empathy map turns those conversations into one shared picture — and the gap between what they say and what they do is where the truth about demand lives.
Carry forward
Verbatim quotes (they become your landing-page copy later) and the pains that showed up unprompted across several people.
- 3
Match your offer to their jobs, pains, and gains
Now you have evidence on the customer side, check whether your product side actually answers it. Every pain reliever must point at a pain a real person described; anything with no partner on the customer side is a feature you invented for yourself.
Carry forward
A one-sentence value proposition written in the customer's own words, plus the shortlist of features that survived the pairing exercise.
- 4
Pressure-test the whole position with a SWOT
Before committing months of work, spend twenty minutes on the brutal quadrants: what could kill this (threats), and what are you personally missing (weaknesses)? Pair weaknesses against threats — that pairing is your risk register.
Carry forward
One decision: build, pivot the segment, or park it. Plus the single riskiest assumption to test first if you build.
What you walk away with
A Lean Canvas grounded in real conversations, a value proposition in customer language, and a named riskiest assumption — everything you need to decide whether to build, exportable as four PDFs.
Start with step one
The Lean Canvas editor opens with guided prompts on every block — 20-40 minutes to a first draft.
Begin: Lean Canvas