Fake Door Tests and Ethics: How to Validate Without Burning Trust

By BuildVoyage Team September 2, 2025 2 min read Updated 1 day ago

Validate the right thing, the right way

A “fake door” is a link or button to a feature or product that doesn’t exist yet. The point isn’t to trick people; it’s to measure intent with minimal waste, then be honest about the status and next steps.

Make the test fair

  • Label it clearly once clicked: “You’re early — we’re validating demand for this feature.”
  • Offer a fast path to value: a waitlist, an interview slot, or a manual workaround you can deliver now.
  • Capture context (role, company size, must‑have vs nice‑to‑have) — don’t rely on a single email field.

Where to place fake doors

  • In product: in a related workflow where intent is highest
  • On your site: in relevant pages (Docs, Pricing, Templates)
  • In content: CTAs inside a how‑to that surfaces the exact job

What to measure (and how to act)

  • Clicks by segment and page location
  • Emails captured and the reasons they gave
  • Replies to your follow‑up message

Close the loop with a short note: “Thanks for your interest — we’re talking to users before we build. If this is a priority, here’s a 20‑minute slot.” Respect goes a long way.

If you’re new to validation, pair this with: Validate Your SaaS Idea Without Writing Code and the Pre‑Launch Checklist.

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Frequently asked questions

Are fake door tests deceptive?
They can be if you hide the truth. Be explicit that you’re gauging interest and will follow up. Offer a waitlist and a personal note.
What conversion rate is ‘good’?
For a high‑intent audience, 5–10% click‑through to the ‘feature’ and 20–40% of those leaving an email is encouraging. Always segment by traffic source.
What should I do with collected emails?
Send a thank‑you, a short survey, and an invite for a 15–20 minute call. Keep the list warm with monthly updates until you ship.
About the author

BuildVoyage Team writes about calm, steady growth for indie products. BuildVoyage highlights real products, their stacks, and milestones to help makers learn from each other.