Start with search demand
Free tools like Google Trends and Search Console, or paid keyword tools, show whether people are already searching for your solution.
Study competitors
List five competitors. Note pricing, positioning, reviews, and complaints. Complaints reveal gaps you can fill.
Talk to real customers
Ten honest customer interviews often teach more than a large survey. Ask about past behaviour, not hypothetical intentions.
Test before you build
A simple landing page and small ad budget can test interest and pricing in days.
Decide with evidence
Write down what you learned, what would make you proceed, and what would make you stop, before emotion takes over.