See how solo founders use Lean to go from a raw idea to a live, marketed product — without a team, without code, and without spending weeks on validation.
Alex was a freelance designer who spent hours chasing unpaid invoices. He had an idea for an invoice tracker but no time to build it, no budget for a developer, and no idea if anyone else wanted it.
Described the idea: "A simple tool for freelancers to track unpaid invoices and send automated reminders."
AI agents analyzed r/freelance, r/graphic_design, r/webdev, r/smallbusiness, and r/Entrepreneur. Found 340+ posts mentioning invoice pain points in the past 6 months.
Generated a focused PRD: invoice dashboard, automated email reminders, and a client portal. Deprioritized payment processing based on research showing most freelancers already use Stripe.
BG Lovable generated a React + Tailwind app with the invoice dashboard, reminder settings, and a clean landing page.
Auto-deployed to Vercel. Live URL in 90 seconds.
AI posted tailored launch content to r/freelance and r/webdev. The r/freelance post hit 150 upvotes in 24 hours.
“I described my idea at 9 AM. By lunch, I had market research showing exactly which subreddit communities were begging for my product.”
Maria had 10 years of product experience but couldn't code. She'd been sketching a habit tracker app that combined accountability with community — but every no-code tool felt too limited and every developer quote was too expensive.
Described the concept: "A habit tracker where users join small accountability groups and share daily check-ins."
AI analyzed r/getdisciplined, r/productivity, r/Habits, r/selfimprovement, and r/DecidingToBeBetter. Identified that loneliness in habit-building was the #1 complaint — most apps were too solitary.
The PRD nailed it: small group formation, daily check-in feed, streak tracking, and gentle nudge notifications. Maria edited the tone section to be "warm, not gamified."
Generated a responsive web app with group creation, check-in interface, and streak visualization.
Live on Vercel with a custom subdomain. HTTPS and CDN included.
Launch posts on r/getdisciplined and r/productivity. The authenticity of the messaging — informed by actual community language — drove strong engagement.
“The PRD was better than what I'd write myself. And seeing it turn into a working app within minutes? That's when I realized the game has changed.”
Jordan had an idea for a CLI tool that auto-generates API documentation from code comments. But he'd been burned before — spending weekends building things nobody wanted. This time, he wanted proof before committing.
Described the tool: "A CLI that reads JSDoc comments and generates OpenAPI specs with a hosted docs page."
AI agents analyzed r/webdev, r/node, r/programming, r/typescript, and r/devops. Found strong demand but also identified two existing tools with poor UX — a clear positioning opportunity.
PRD focused on what competitors got wrong: slow generation, ugly output, no TypeScript support. Jordan's tool would be fast, beautiful, and TS-first.
Generated a landing page and waitlist — not the CLI itself, but the marketing site to gauge real interest before building.
Landing page live in under 2 minutes. Waitlist form connected.
Posts on r/webdev and r/node. The positioning — "the API docs tool that doesn't suck" — resonated immediately.
“I used to build first and find users later. Now I validate first. The research alone saved me weeks of wasted effort.”
Across all case studies, the pattern is the same: describe, validate, build, ship — all before your coffee gets cold.
Every case study above started with a single sentence. Describe your idea and let the pipeline do the rest.