How do you find people to interview for a startup idea?
Updated · by Vouch
Short answer
Start with a narrow description of who had the problem recently, then go where those people already discuss it: niche communities, forums, LinkedIn or X searches, events and your own past colleagues. Ask for a short conversation to learn about their experience, not to pitch. Expect many non-replies; track every ask so you know which channel actually produces interviews.
Step-by-step
- 1Describe who had the problem recently
Write one sentence: role, situation and the last time the problem happened. 'Freelance designers who chased a late invoice this month' is searchable; 'small businesses' is not.
- 2Go where they already talk
Search communities, subreddits, Slack or Discord groups, LinkedIn and X for people describing the problem in their own words. Read the rules first; many communities ban promotion, so contribute and ask permission before messaging.
- 3Ask to learn, not to sell
Send a short, specific request: why you are reaching out, that you want to hear about their experience, and that it takes about 20 minutes. Do not attach a pitch deck or product link.
- 4Ask each interviewee for one more name
Close every conversation by asking who else deals with this problem. Warm introductions usually reply far more often than cold messages.
- 5Track every ask
Log channel, message and outcome for each request. After a week you will see which channel produces conversations, and you can stop spending time on the rest.
Frequently asked
How many people should I interview?
There is no fixed number. Keep going within one customer group until new conversations stop revealing new problems or workarounds; for many early ideas that is somewhere around 5–15 conversations per segment.
Should I pay interviewees?
Small incentives can help with hard-to-reach groups, but paid participants may be less representative of real buyers. Note who was paid when you review the evidence.
Are friends and family useful interviewees?
Only if they genuinely match the customer description, and even then they tend to be polite. Prefer strangers who recently had the problem.
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Start freeFacts 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.