Joined May 2008
- Tweets 1,680
- Following 1,795
- Followers 13,429
- Likes 13,881
48 Photos and videos
Pete Koomen retweeted
Jun 12
We've always told startups to launch early, but I realized there's a powerful new reason to.
Before you launch, the speed you can build is now mainly limited by your imagination in what you tell AI.
After you launch, the AI can watch your users and make improvements on its own.
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Jun 12
I've admired @sdianahu since we met. She's an exceptional mentor to her founders and an exceptional partner at YC. Congratulations!
Jun 11
We're excited to announce Diana Hu (@sdianahu) as YC's newest Managing Partner.
Diana co-founded Escher Reality (YC S17), which was acquired by Niantic, where she shipped AR to the 100M people playing Pokémon GO. Since returning to YC as a partner, she has worked with nearly 230 companies that are now worth a combined $7 billion.
Few people have built a startup from zero and also shipped at global scale. Diana has done both.
ycombinator.com/blog/diana-h…
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Pete Koomen retweeted
Jun 11
We're excited to announce Diana Hu (@sdianahu) as YC's newest Managing Partner.
Diana co-founded Escher Reality (YC S17), which was acquired by Niantic, where she shipped AR to the 100M people playing Pokémon GO. Since returning to YC as a partner, she has worked with nearly 230 companies that are now worth a combined $7 billion.
Few people have built a startup from zero and also shipped at global scale. Diana has done both.
ycombinator.com/blog/diana-h…
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Pete Koomen retweeted
Jun 10
Brex co-founder and CEO Pedro Franceschi believes most people still underestimate how much AI will change the way companies are built. AI isn't just another tool, it's a new foundation for building products, teams, and companies.
In this episode of @LightconePod, @pedroh96 explains why we're only months into a platform shift as significant as the invention of electricity, why the CEO needs to be the chief AI officer, and why founders should rethink what's possible when intelligence is available on demand.
01:13 – How Pedro Became AI-Pilled
04:08 – The Electricity Analogy
05:21 – Free the Claw
06:56 – Making AI Safe for Enterprise
10:57 – Why Most Companies Are Behind
13:09 – AI Teammates, Not Chatbots
14:22 – The Case for Tokenmaxxing
18:24 – The Company of One
20:54 – The One Thing AI Can't Replace
28:06 – Building Customer World Models
32:58 – Rebuilding Brex Around AI
39:02 – The CEO Must Be the Chief AI Officer
43:50 – Building Company AGI
51:43 – Why We're Still So Early
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i've started using @trybloomai to generate diagrams and images for blogs I'm writing via codex and it's actually pretty insane - it used to take me like an hour to even just think of an image description, but now it's like 1 prompt
Jun 5
@v0 now has a brand layer
Building in v0?
Connect @trybloomai to ship on-brand.
Steps below...
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Jun 6
New trolly problem just dropped
Jun 5
PSA: Do not open your windows in Waymos.
I was assaulted and robbed in a Waymo in the Mission District.
I was punched three times in the face and head. Waymo treats criminals as pedestrians and stops moving, leaving you vulnerable.
They gave me 5 free rides tho
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Jun 6
Binbin has been quietly cooking on something very powerful this batch: a small, fast VM with container-like ergonomics that runs everywhere.
I think it has the potential to become a new primitive for deploying software
Jun 5
smolvm has hit stable release: v1.0.0!
You can now fork smolvm.
It means you can fork to create virtual machines off of an existing one in less than 100ms, with all the processes cloned and running.
smolvm is the first to have this feature cross platform compatibility (macOS and linux natively).
Here's a demo of a counter continuing on a forked clone while I only started it on the original!
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Defense primes build Bugattis. The army is begging for an F-150.
A founder in our batch is building munitions backwards: start at 'what can we stamp out for $20k?' and make the engineers hit it.
May 30
Tenet Industries (@industriestenet) is building low-cost, mass-producible defense systems, starting with strike drones.
Defense primes are still building Bugattis and Ferraris. Tenet is building the F-150 for defense.
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Jun 5
I met the @industriestenet founders while visiting KTH in Stockholm this January. They invited me to tour their basement lab and showed me an early prototype of their quad drone.
They were obsessed with deleting unnecessary parts. When I left they handed me a 'business card': a custom PCB they'd designed to replace four boards on a standard quad.
May 30
Tenet Industries (@industriestenet) is building low-cost, mass-producible defense systems, starting with strike drones.
Defense primes are still building Bugattis and Ferraris. Tenet is building the F-150 for defense.
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Jun 4
I like the idea of creating "slop free zones" in a codebase where every line must be written or reviewed by a human. Has this concept been formalized a la rust's unsafe?
Jun 4
In the first episode of our new series Full Stack, @conductor_build CEO and co-founder @charlieholtz takes us into the details of how he sets up his workflow for coding and managing AI agents.
00:00 – Building Conductor With Conductor
01:05 – Managing a Team of Coding Agents
02:39 – Do You Still Write Code?
04:17 – Charlie's AI Stack and Setup
05:48 – “Slop-free” Zones
07:25 – Don’t Let the AI Be Your Architect
09:15 – The Future of Cloud Workspaces
10:40 – Claude vs Codex
12:01 – Tokenmaxxing
14:17 – The Future of Human–AI Collaboration
15:07 – "Code Is Becoming Sawdust"
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Pete Koomen retweeted
May 30
Tenet Industries (@industriestenet) is building low-cost, mass-producible defense systems, starting with strike drones.
Defense primes are still building Bugattis and Ferraris. Tenet is building the F-150 for defense.
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Everyone's bottleneck in voice AI is the same: retrieval. The agent thinks, network round-trips to a vector DB, and the magic dies.
Moss runs search at sub-10ms (no hop). Open source. This is the layer voice agents were missing. Build on it June 6-7 at the YC office.
May 29
Come build agents that can finally hold a fluid conversation at the 24-Hour Conversational AI Hackathon, hosted by @usemoss at the YC Office, June 6-7. First place wins an interview with a YC partner: events.ycombinator.com/conve…
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May 29
Come build agents that can finally hold a fluid conversation at the 24-Hour Conversational AI Hackathon, hosted by @usemoss at the YC Office, June 6-7. First place wins an interview with a YC partner: events.ycombinator.com/conve…
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Pete Koomen retweeted
May 27
One night I quietly gave our AI agent full access to YC's production database. It made the agent 10x more useful. That's what convinced me that trust-by-default is the only way to get the most out of agents.
May 27
Over the past year, we've been building our own internal agent infrastructure at YC: over 350 tools, self-improving skill loops, and a shared organizational brain that gets smarter overnight.
In this episode of the @LightconePod, we sat down with YC General Partner Pete @koomen to talk about how he led the effort from the ground up.
We cover how giving agents unrestricted access to one database was the key unlock, the self-improving skill loops that get smarter overnight, and why he thinks we've arrived at the personal computer moment for AI.
00:39 — YC's AI Stack
02:15 — The Finance Team Problem That Started It All
05:07 — SQL Access Changes Everything
07:20 — One Database to Rule Them All
09:14 — Jevons Paradox
10:07 — Denormalizing for Agents
12:15 — The Single-Player Era of Agents
14:16 — 350 Tools and a Shared Registry
16:24 — Skillify, DRY, and MECE Resolvers
18:23 — The Self-Improving Dream Cycle
20:26 — The Two-Sentence Pitch Skill
23:06 — How Super Intelligence Compounds
25:10 — Recording Everything as a Building Layer
27:10 — The Shared Organizational Brain
29:18 — Trust-Default Culture as a Requirement
30:44 — Raising the Floor for New Employees
32:35 — Horseless Carriages
34:24 — Why Chat Is the Best Interface for Agents
38:50 — Just-in-Time Software
40:49 — Centralizing vs. Decentralizing AI
43:32 — The Personal AI Revolution
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May 27
Napkin math is the first food tracker I actually like using
May 27
What’s messing up your tummy? Napkin Math (napkinmath.club) knows.
Napkin Math is the hyper-personalized AI food journal that helps people achieve their health goals.
Congrats on the launch, @jynniit, @clairen19 & @manny4c!
ycombinator.com/launches/QXK…
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May 27
For more than a year we've been building tools at YC to make it easier to use agents at work. I enjoyed speaking publicly about this for the first time with the Lightcone crew!
May 27
Over the past year, we've been building our own internal agent infrastructure at YC: over 350 tools, self-improving skill loops, and a shared organizational brain that gets smarter overnight.
In this episode of the @LightconePod, we sat down with YC General Partner Pete @koomen to talk about how he led the effort from the ground up.
We cover how giving agents unrestricted access to one database was the key unlock, the self-improving skill loops that get smarter overnight, and why he thinks we've arrived at the personal computer moment for AI.
00:39 — YC's AI Stack
02:15 — The Finance Team Problem That Started It All
05:07 — SQL Access Changes Everything
07:20 — One Database to Rule Them All
09:14 — Jevons Paradox
10:07 — Denormalizing for Agents
12:15 — The Single-Player Era of Agents
14:16 — 350 Tools and a Shared Registry
16:24 — Skillify, DRY, and MECE Resolvers
18:23 — The Self-Improving Dream Cycle
20:26 — The Two-Sentence Pitch Skill
23:06 — How Super Intelligence Compounds
25:10 — Recording Everything as a Building Layer
27:10 — The Shared Organizational Brain
29:18 — Trust-Default Culture as a Requirement
30:44 — Raising the Floor for New Employees
32:35 — Horseless Carriages
34:24 — Why Chat Is the Best Interface for Agents
38:50 — Just-in-Time Software
40:49 — Centralizing vs. Decentralizing AI
43:32 — The Personal AI Revolution
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Pete Koomen retweeted
May 27
Gustaf (right) when he was in YC. You can see why our nickname for this startup was "the band".
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May 26
Szymon, TesterArmy’s 19yo CEO, started professional development at 14 and shipped production apps used by millions throughout high school. He had to travel back to Poland during the batch to graduate.
May 26
TesterArmy is the simplest way to QA your website or mobile app.
It runs real tests across browsers and devices, catches regressions on every PR, generates tests from natural language, and much more.
Try now and start testing in minutes: @TesterArmy
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Memorial Day is a reminder that freedom isn't the default state of the world. People fought and died for it.
I am thankful America is where you can build, create, and push the frontier forward.
Thank you to the men and women who served and gave their lives. 🇺🇸
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Pete Koomen retweeted
May 25
Mount (@mountinsure) secures and insures autonomous AI agents before they cause damage.
They secure the workflow, measure the remaining risk, and transfer that risk through insurance built specifically for it, so companies can use AI agents in more productive workflows without carrying the full risk alone.
Congrats on the launch, @johnbachm & @fabeamherd!
ycombinator.com/launches/QUI…
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