Y Combinator (@ycombinator) / X

Y Combinator

25.1K posts

Y Combinator

@ycombinator

We help founders make something people want. Subscribe to our newsletter: yc.link/newsletter

San Francisco, CA

Joined February 2010

@ycombinator

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Y Combinator
@ycombinator
Jun 22
The best way to learn AI is to work at an AI startup. On August 15, we're inviting ambitious students to YC HQ to meet founders and engineers from 50+ YC companies. Roam the expo hall to meet founders (and collect swag), startups pitch you, interview onsite, and land your
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wafer
@wafer_ai
3h
🚨 OpenAI is launching GPT-5.6 Sol on Cerebras at up to 750 tps. Here's How kernels work on Cerebras Chips cerebras built a chip with 900,000 cores on a single silicon wafer. CSL (Cerebras Software Language) is a Zig-inspired DSL that gives you direct control over the
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Diana
@sdianahu
2h
closing the loop is key for exponential improvement nice work!
Amjad Masad
@amasad
Jul 6
Many are asking how Replit is improving so rapidly—we closed the loop and the agent is self-improving. Technical details here:
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Blake Scholl 🛫
@bscholl
3h
Boom also had a board meeting where the board told me to shut the company down. XB-1 hadn’t broken the sound barrier yet. The team deployed in the Mojave desert was exhausted from months of fighting tough technical issues. We had only a few weeks of cash left and no one saw a
Race 🕊️
@multiplanet1
10h
A Tesla executive once described a board meeting where Elon was told by three separate advisors that Tesla would not survive the next quarter. The money was gone. The Model 3 production line was failing. Media was running daily stories about Tesla's imminent bankruptcy. One
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Nebula Security
@nebusecurity
2h
GhostLock (CVE-2026-43499) is a 15yr old kernel 0-day we used in IonStack full chain exploit. Everything around you, as long as it runs Linux, from IoT to mobile to desktop, is affected. Read how we won $92,337 bug bounty with GhostLock and see our exploit on Github. Link below
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Y Combinator
@ycombinator
4h
Congrats to @surtrdefense on their $4.8M seed! Counter-drone operators today juggle a wall of screens: sensors, radars, and effectors that don't talk to each other. Surtr pulls it all into one interface and can automatically cue a response to incoming threats. They already
Exclusive: Surtr Raises $5M Seed for C-UAS Integration
From tectonicdefense.com
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Stillwind
@stillwinddotai
8h
Every PCB design is a constraint problem. Stillwind Builder solves it — zero to BOM in minutes instead of days. Electrical + functional compatibility, checked across the whole system. Public beta is live, free during launch week: stillwind.ai
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Nino
@use_nino
12h
Today Nino goes live in beta. A dedicated CFP + CPA team, backed by software that sees your whole financial life. The advice that used to require a family office, for the rest of us. 🧵
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Pete Koomen
@koomen
8h
In <2yrs @bekacru turned better auth into the #1 auth framework for typescript and one of the most popular and influential oss projects in the world. He’s a world-class developer with impeccable taste. It’s hard to imagine a better home for him and his work than @vercel, or a
Better Auth
@better_auth
11h
Better Auth is joining Vercel. Vercel shares our commitment to keeping auth open source, framework and platform agnostic. Joining forces gives us more resources and room to focus on building the framework that much of the community relies on. Together, we’ll also be able to
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Verdant
@verdantgov
8h
Verdant is building the modern tech infrastructure for local government, starting with permitting software. Permit and entitlement review takes too long. Applicants often apply with incomplete or incorrect information, triggering rounds of back-and-forth with the government. And
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Willow
@WillowVoiceAI
11h
Introducing Willow Frontier Mini and Willow Frontier Pro. Frontier Mini gives everyone free, unlimited dictation. Frontier Pro is our most accurate model yet, built for power users and teams who want the fastest and best dictation experience.
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Jay@Proception
@JayLiStanford
Jul 6
Robots need to handle fragile objects. Here’s our ProHand moving real eggs between trays. The video is sped up to show multiple successful transfers, and we cracked one at the end to prove it’s real. Not fast yet. But useful dexterity starts here.
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Nitrode Research
@NitrodeResearch
11h
Today, @NitrodeResearch is excited to present where we're headed as a company, and what's next - read our @ycombinator launch below: ycombinator.com/launches/RIH-n…
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Catalin Voss
@CatalinVoss
11h
Everyone's asking what AI can do for their job. We asked if it could teach a 6-year-old. Introducing Ello 2.0: reading, math & more for ages 4-9. Free tier for all. If we want AI to force-multiply humanity, let's start with teaching our youngest.
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