Luis Henrich-Bandis

I’m Luis. 23, founder, based in Cologne. I’m building Lagias, a quant research harness for retail traders, and I run StudyPDF solo at 100,000+ users across 200+ universities.

I write here when something’s actually worth writing about. Solo founding, applied AI, what Claude Code can and can’t do. Usually something I learned the hard way.

Currently

• Building Lagias with Luca Wuerker. Your own quant researcher: describe an investment idea in plain English, and it comes back backtested
• The AI proposes, a deterministic harness decides. No model gets to grade its own work
• Waitlist open at lagias.com. Alpha invites start in August, launch follows in September
• Still running StudyPDF, now past 100,000 registered users

Writing

• Aug 7, 2026Did the bet work?
• Aug 7, 2026100,000 users, and the number that is going down
• Jun 19, 2026I rewrote my entire product. Here's the bet.
• May 12, 2026How I run an 85,000-user AI study platform solo