LP

Len P. van der Hof, MSc

Founder, ReasonKit

27 years old, based in Rotterdam, Netherlands. I'm building ReasonKit to bring structured reasoning to AI development. Previously studied Strategic Entrepreneurship. Now turning academic research into practical tools. Building in public because the journey matters.

12,400+
Installs
Week 12
Building
3
Enterprise Trials
1
Founder
Latest Updates

Week 12: The Website Overhaul

Dec 24, 2024

Spent this week completely rethinking the website. The old "structured reasoning" messaging wasn't landing. Shifted to "Cognitive Engineering" - from prompt engineering to something more systematic. Added an interactive demo, fixed responsiveness, and started building the content hub. Still looking for a technical co-founder.

marketing website positioning

Why I Started ReasonKit

Dec 2024

The frustration started when I realized AI was giving me confident garbage. Every LLM sounded sure of itself but missed obvious questions. Then I found the research: Tree-of-Thoughts hits 74% success where Chain-of-Thought hits 4%. That's not incremental. That's paradigm-shifting. Someone needs to make this accessible. So I'm building it.

origin story research

First 10K Installs

Dec 2024

Hit 10,000 installs this week. Mostly from Hacker News and word of mouth. No paid marketing yet. The interesting part: enterprise inquiries are coming in. Turns out companies care about AI reliability. Who knew? (Everyone. Everyone knew. But they're paying attention now.)

milestone growth enterprise

Want to Build This Together?

I'm looking for a technical co-founder who's excited about AI reasoning.

Learn About the Opportunity
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