YC Demo Day: What Happens Off-Stage

Founders closing rounds before lunch. Investors making handshake commitments in the hallway. A startup with $9M+ ARR and another with $15M ARR lighting up the room. YC Demo Day isn’t a show; it’s a marketplace where speed and execution decide everything.

In this fast, founder-first debrief, we break down what actually happened at the latest YC Demo Day: the subtle format changes (that matter), why the one-minute pitch is only the opener, and how deals really get done. We cover the batch’s AI/devtools tilt, the contrarian bets in defense and hardware, and why early traction remains the single best predictor at seed. We also unpack portfolio construction, conversion-rate dynamics inside YC, and what support looks like after the cameras stop.

You’ll learn:

- The real Demo Day mechanics: tranches, chat apps, long breaks for dealmaking

- Why some hot rounds are already full and what to do about it

- How to win YC deals: first-meeting decisions, 24–48h timelines, and prep work

- The $9M+ ARR investment we made—and why traction beats narrative

- Why we’re now backing deeptech/hardware (missiles vs drones, autonomous excavators)

- Portfolio strategy: aiming for the fund returner, not spray-and-pray

Chapters:

00:00 Introduction and Demo Day Overview

00:15 Behind the Scenes of Demo Day

01:03 Changes and Improvements at YC Demo Day

03:11 Investor Insights and Strategies

04:23 Engaging with YC Startups

06:35 The Importance of Early Traction

09:49 Demo Day Pitch Dynamics

13:42 Fundraising Conversations and Strategies

18:07 Lobster Capital's Investment Approach

21:54 Portfolio Construction and Future Prospects

27:02 AI and Dev Tools: A Crowded Space

27:39 Challenges in Identifying Winners

28:48 Customer Acquisition: The Key to Success

29:57 The Importance of Traction

33:32 Investing in Deep Tech and Hardware

39:24 Evaluating Flywheel's Potential

45:46 Supporting Startups Post-Demo Day

50:09 Looking Ahead: The Never-Ending Cycle

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