← The Build Signals
A free founder tool

The Idea Validation Tool

You have an idea.But should you build it?

Use The Build Signals’ evidence-first method on one real idea — before you spend months building it.

A practical founder tool for finding real conversations, separating complaints from behaviour, and deciding what deserves your next move.

Bring one real idea. Start today.

What you’ll be able to do

Investigate your own idea, the way we investigate a market.

These aren’t things you’ll read about. They’re the moves you’ll make, in order, on the idea you brought with you.

Find the real conversations

Where people already discuss the problem, in places where you're not the audience — and how to search for the problem rather than your product.

Separate complaints from behaviour

Eight kinds of evidence, clearly distinguished. What people say, and what people actually did about it.

Identify the workarounds

The spreadsheets, scripts and group chats people built themselves — usually the clearest signal of what's missing.

Spot switching and shopping

Who left what, what triggered it, and who is actively looking right now.

Record what the evidence tells you

An evidence table that forces the distinction most founders skip, one row at a time.

Name what you still don't know

The column nobody writes down — and the one that tells you what to investigate next.

Decide your next move

Build a small test, investigate further, narrow the problem, or pause — with the reasoning written down.

Inside the tool

Built to be used, not read.

Worksheets you can print, a timed first pass you can run this afternoon, and worked examples from investigations that were actually published — including the points where each one stopped short of what it could prove.

Bring one real idea. It’s designed to be worked through, not skimmed.

  1. 01Your first 60 minutesA timed first pass you can run today, on one real idea.
  2. 02The evidence typesEight forms of evidence, grouped by what people say and what people do.
  3. 03The behaviour testEight questions, each with what a yes can and cannot tell you.
  4. 04The evidence tableThe core worksheet, with three worked rows from real investigations.
  5. 05Seven ways to build too earlyThe reasonable-looking habits that make evidence agree with you.
  6. 06The decisionFour defensible outcomes — and the two questions to answer before you commit.

The idea it rests on

People talking about a problem, and people doing something because it matters, are two different findings.

Complaint volume is the easiest thing to measure and the easiest thing to misread. It tells you what a market will discuss. It doesn’t tell you what a market will move for.

So the tool teaches you to classify evidence by what it cost the person to produce — and to keep those two questions separate for as long as the evidence does.

  1. A complainttells you it’s on their mind.
  2. A workaroundtells you it was worth their effort.
  3. A switchtells you staying became costly.
  4. A paymenttells you a budget already exists.

These are different kinds of evidence, not a score — nobody has to climb from one to the next. The goal isn’t a single magic signal. It’s an evidence picture clear enough to decide on, and precise about the questions it still hasn’t answered.

Built from real market investigations

The method isn’t theoretical. It produced these.

Both appear in the tool as worked case studies, with their real numbers, their real quotes, and — just as importantly — the points where each investigation stopped short of what it could prove.

Issue No. 01 · Property Management Software

The Loudest Complaint Isn't the One Anyone Will Pay to Fix

41 searches179 conversations found111 read closely

The loudest theme had eight independent discussions behind it and nobody switching, requesting a fix, or paying. A quieter theme had fewer discussions and people already acting on it.

The loudest complaint wasn’t the strongest signal.

Read Issue No. 01 →
Issue No. 02 · Construction Accounting

The Real Problem Isn't Your Software. It's the Lag.

52 searches319 conversations found171 read closely

Builders were switching accounting tools constantly — and the workarounds they’d built by hand pointed at something the complaints never named: the delay between spending money and seeing it recorded.

The complaints showed where people were looking. The workarounds showed what was missing.

Read Issue No. 02 →

We’ve used this approach on real markets. Now use it on yours.

Do it yourself

Pick the idea you’re actually weighing up, work through the first 60 minutes, and fill one evidence table. You’ll finish knowing more about the problem than most founders learn in a month of building. The tool is free.

Or have us do itWant us to investigate the market behind your idea instead? We can do that too →

What it isn’t

  • Not a startup idea generator.
  • Not a “build in 7 days” challenge.
  • Not a survey template pretending to prove demand.
  • Not a checklist designed to make you feel validated.

Don’t build yet. Investigate first.

You already have the idea. Give it one hour before you give it six months.