How a Forgotten Free Tool Built a 28,000-Email Audience Before It Had a Business Model

Illustration of a free utility tool growing into a repeat-user paid product

Some of the best product signals do not arrive as a survey response or a polished waitlist. Sometimes they show up quietly: a small tool keeps getting used long after its maker has stopped thinking about it. That is what happened to a free truss-analysis tool built by developer Andrew Young. He made it for … Read more