Founder stories
Browser extension to inspect and copy CSS.
How Guilherme acquired customers
Tools used to build CSS Scan
I'm from Brazil and built CSS Scan because I always wanted to know what border-radius, box-shadow, or font-family an element I see has.
It took me 9 months to get the first $10,000 and just 9 more months to get an additional $60,000.
I didn't spend money on paid ads - I let my product's effectiveness do the work. 7,000+ people from 116 different countries use my extension.
Solve your own problem - I built the tool I wanted to use
You don't need paid ads if the product is genuinely useful
Product Hunt can be a great initial launch platform
Self-taught developers can compete with anyone
Inspired by Guilherme's journey? Generate a business idea in the Developer Tools space using AI and real founder data.
Guilherme achieved 4 milestones on the path to $100K ARR
$5
$1,000
$70,000
$100,000
The journey, decisions, and context behind this milestone
See the complete breakdown: launch strategy, validation methods, startup costs, expert analysis, replication playbook, and more actionable insights.
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