What should I build first to test a business idea?
Short answer
Build the smallest version a real person can see and act on: one clear offer for one customer, a way to respond or pay, and a way to follow up. Not a full website, not a brand, not a course.
Start from the customer, not the tools
Decide who it is for and which problem it solves first. The tools come last.
Then pick the one build that tests the riskiest assumption: will this person respond, book or pay?
What a first build contains
A visible page that says who it is for, what it solves and what happens next.
One action: reply, book, join a list or pay.
Follow-up, so a response does not disappear.
Building is not the finish. After it stands, you make it visible, see who responds, learn and build again.
Illustrative example
Illustrative, not a client case.
Someone wants to offer bookkeeping help to freelancers. The first build is one page for freelancers who are behind on their quarterly VAT return, a booking link for a paid intake and an automatic confirmation mail. The test is whether people book.
Limitations
- A first build gives you a signal, not proof of a business.
- What counts as a good signal depends on your market. Decide your threshold before you test.
Written by Engracia Sleeswijk, founder of ESleeswijk Consultancy B.V.
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