Garry Tan

Garry Tan

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President & CEO @ycombinator —Founder @Initialized—designer/engineer who helps founders—SF Dem accelerating the boom loop—haters not allowed in my sauna

Incumbents Call AI Startup Agents Parasites, Data Belongs to Users
SocialMar 18, 2026

Incumbents Call AI Startup Agents Parasites, Data Belongs to Users

Recent earnings call, Aneel Bhusri of Workday says startups with AI agents are "parasites" This is what system of record incumbents really think of startups. The war is just beginning. The facts: the user data belongs to the users, not...

By Garry Tan
Launch of GStack Office-Hours Skill Mimics YC Guidance
SocialMar 18, 2026

Launch of GStack Office-Hours Skill Mimics YC Guidance

I just launched /office-hours skill with gstack. Working on a new idea? GStack will help you think about it the way we do at YC. (It's only a 10% strength version of what a real YC partner can do for...

By Garry Tan
Diagram Requests in Reviews Eliminate 90% of Bugs
SocialMar 18, 2026

Diagram Requests in Reviews Eliminate 90% of Bugs

/plan-ceo-review and /plan-eng-review skills basically gets you 90% of the way to done most of the time the secret in plan-eng-review is that you can always ask for a diagram, and the act of creating the diagram (user flow, data flow,...

By Garry Tan
Data‑Driven Agents Power Accurate Automated File Search
SocialMar 18, 2026

Data‑Driven Agents Power Accurate Automated File Search

You can build an agent but it is blind without data. The founders of @RunCaptainRAG applied their NLP research in their startup to create automated file search. Really accurate results within Garry's List. Here they are at the YC MV...

By Garry Tan
GStack Automates Role‑specific Review Tracking for Startups
SocialMar 17, 2026

GStack Automates Role‑specific Review Tracking for Startups

New innovation: Just as at a well-run startup, there are CEO, engineering manager and design reviews, GStack now helps you keep track of what reviews are run, figures out what is appropriate (e.g. CEO doesn't have to look at infra...

By Garry Tan
Upgrade Gstack in Claude Code with Simple /Gstack-Upgrade
SocialMar 16, 2026

Upgrade Gstack in Claude Code with Simple /Gstack-Upgrade

Upgrading your gstack setup in Claude Code is now as easy as just calling /gstack-upgrade. "Markdown as code" in action https://t.co/KdLt6hIMCO

By Garry Tan
AI Promises an Amazing Future, yet Underappreciated
SocialMar 15, 2026

AI Promises an Amazing Future, yet Underappreciated

AI is going to create a truly amazing future, but very few people really think that ... yet

By Garry Tan
Claude Code Delivers “I Know Kung Fu” Moments
SocialMar 15, 2026

Claude Code Delivers “I Know Kung Fu” Moments

The really crazy thing about language as code is that it's just about passing the right info to the right agent at the right time, even across workspace boundaries I'm having the time of my life developing https://lnkd.in/gDJRzGNr <-- if...

By Garry Tan
LLM Evaluations Enable Consistently Better Agentic Systems
SocialMar 15, 2026

LLM Evaluations Enable Consistently Better Agentic Systems

Full evals system coming to GStack shortly. LLM evals are the only way you can make fully agentic systems that are repeatably better as you improve the workflow, context engineering and prompts.

By Garry Tan
AI
SocialMar 14, 2026

AI

AI requires high IQ right now to get the most out of it But will that be true in 10 years? Or even next year?

By Garry Tan
NY AI Ban Shields Cartel, Ignoring Uninsured Crisis
SocialMar 14, 2026

NY AI Ban Shields Cartel, Ignoring Uninsured Crisis

New York wants to ban AI that outscores doctors on medical exams. Over 900,000 New Yorkers have no insurance. 92% of low-income legal problems go unaddressed. Anti-AI NY bill S7263 isn't consumer protection. It's cartel protection. https://t.co/e9BdWuvvUB

By Garry Tan
GPT-5.4 Solves Two-Decade AI‑impossible Polish Math Puzzle
SocialMar 14, 2026

GPT-5.4 Solves Two-Decade AI‑impossible Polish Math Puzzle

A Polish mathematician spent 20 years building a problem he said no AI could solve. GPT-5.4 cracked it on run 11. https://t.co/ORmXbqZrVQ

By Garry Tan
From Stanford Pizza Nights to Palantir’s Birth
SocialMar 14, 2026

From Stanford Pizza Nights to Palantir’s Birth

Amazing. In 2006 I went to Stanford with stacks of pizza to the Unix cluster at Sweet Hall with xerox fliers It said: Come join the next Google We were a 12 person startup The name of the startup? Palantir

By Garry Tan
Embrace Fluid Roles: Agents Can Be CEO Today
SocialMar 13, 2026

Embrace Fluid Roles: Agents Can Be CEO Today

Running a team of agents is interesting because any given agent can be CEO one moment, then the eng manager wagging the finger the next And as the orchestrator, you want this. https://t.co/xjhE4jwiGq

By Garry Tan
Install Gstack Instantly via Claude Code Snippet
SocialMar 12, 2026

Install Gstack Instantly via Claude Code Snippet

I've been having such an amazing time with Claude Code I wanted you to be able to have my *exact* skill setup: Introducing gstack, which you can install just by pasting a short piece of text into your Claude code...

By Garry Tan
Future AI Will Constantly Rewrite Perfect Software for Users
SocialMar 11, 2026

Future AI Will Constantly Rewrite Perfect Software for Users

One of the things everyone believes about software is that "once it works you shouldn't touch it." But what if that is wrong? What if in the world of infinite software that is very very good and smart and well tested...

By Garry Tan
Groq + LLaMA 4 Maverick Excels at Low‑latency Tasks
SocialMar 10, 2026

Groq + LLaMA 4 Maverick Excels at Low‑latency Tasks

Don't sleep on Groq + LLama 4 Maverick - wow, very very useful for low latency tasks

By Garry Tan
Vibe Coding Fuels Success, Despite the Haters
SocialMar 9, 2026

Vibe Coding Fuels Success, Despite the Haters

All these smartasses think it’s vibe coding I made Posterous (one of the biggest Rails sites in the world at the time) and Bookface (a social network used by half of YC alums daily) If you can fly, you fly to...

By Garry Tan
Hard‑
SocialMar 8, 2026

Hard‑

The hard left is becoming slightly more YIMBY, but the policies that got them here means their housing math doesn't add up. NYC and LA won't make housing affordable with Mamdani and Raman. https://t.co/CsMJLThCws

By Garry Tan
Great Journalism Turns Into VC Investment, Wired Missed
SocialMar 4, 2026

Great Journalism Turns Into VC Investment, Wired Missed

Trae Stephens Wants to Buy Wired. He’s Right. A 2011 article about male birth control became a Founders Fund investment. That’s what great journalism does. Wired forgot. https://t.co/nJv3I8Tg81

By Garry Tan
Cheap AI Cognition Fuels a Vibrant, Efficient Market
SocialFeb 24, 2026

Cheap AI Cognition Fuels a Vibrant, Efficient Market

AI will unleash the most vibrant new market there could be. Cognition becoming cheap means we will do more with less, emphasis on doing more. https://t.co/jGKgs06jTi

By Garry Tan
Unusual Retention Curve Mirrors the Hype Cycle
SocialFeb 22, 2026

Unusual Retention Curve Mirrors the Hype Cycle

Does a hype cycle have a retention curve that looks like this? Literally never seen a retention cohort graph like this https://t.co/BwMCDv7eIY

By Garry Tan
Boston Trains AI Founders; SF Steals Them—Others Beware
SocialFeb 17, 2026

Boston Trains AI Founders; SF Steals Them—Others Beware

Boston has the schools. SF has the companies. 21 of the Forbes AI 50 founders went to school in Boston—then left for San Francisco. If SF doesn’t learn from this cautionary tale, Austin and Miami will. https://t.co/pmYxLaYXWy

By Garry Tan
AI's Open Era for Heretical Ideas Is Fleeting
SocialFeb 16, 2026

AI's Open Era for Heretical Ideas Is Fleeting

AI Is In Its Gentleman Science Era. AI research is wide open for builders with heretical ideas. The window won’t last forever. https://t.co/QxaaZClAHj https://t.co/ZgLbymNfIw

By Garry Tan
Unrealized Gains Tax Threatens New Investments Globally
SocialFeb 14, 2026

Unrealized Gains Tax Threatens New Investments Globally

Unrealized gains tax is a mega-drag on new investments. The same reason why the California Asset Seizure Tax by SEIU-UHW is going to destroy startups is happening in the Netherlands. https://t.co/jMgP3ieI2G

By Garry Tan
Pre‑PMF Funding Demands Clear Traction Over Resume
SocialFeb 14, 2026

Pre‑PMF Funding Demands Clear Traction Over Resume

Big splashy pre-PMF rounds happen on big legible ideas and teams with social proof Don’t hate the player hate the game It doesn’t mean you can’t build a big co if you don’t have the right resume but it does mean you...

By Garry Tan
SF's VC Boom Faces Tax Hike and Lab Bans
SocialFeb 14, 2026

SF's VC Boom Faces Tax Hike and Lab Bans

SF is the ONLY VC hub with positive company formation growth (+24%) while every other city declines—but an 800% gross receipts tax hike and lab bans threaten to destroy what makes the city special. https://t.co/gVxAtL7zDC

By Garry Tan
Startups Can Grow Tenfold, YC Fuels the Boom
SocialFeb 10, 2026

Startups Can Grow Tenfold, YC Fuels the Boom

What do I believe that few other people believe yet? Startups can and will be 10x bigger YC’s role to make that happen. We're the tree of prosperity: minting more great founders so that both the mega-platforms and the boutiques have...

By Garry Tan
Bug‑Fix Speed Reveals a Founder’s True Mastery
SocialFeb 9, 2026

Bug‑Fix Speed Reveals a Founder’s True Mastery

If you use any software, you will hit bugs. Only a tiny 5% of your users will ever report bugs. The speed at which those bugs are fixed is the true measure of a founder in mastery of their craft.

By Garry Tan
Avoid Boiling the Ocean: Prioritize Small, Impactful Wins
SocialFeb 7, 2026

Avoid Boiling the Ocean: Prioritize Small, Impactful Wins

Boil the Ocean https://lnkd.in/gqrf2J2v

By Garry Tan
California Policies Threaten Fintech’s Growth Engine
SocialFeb 7, 2026

California Policies Threaten Fintech’s Growth Engine

Vlad Tenev: California is killing the golden goose https://lnkd.in/gi_PUuHa

By Garry Tan
Reviving the Lost Culture of Building Together
SocialFeb 4, 2026

Reviving the Lost Culture of Building Together

We used to build things? What happened? And what do we have to do to get back to building again? https://lnkd.in/gKUa7cNe

By Garry Tan
NIMBYism Costs U.S. Workers $8,775 Annually
SocialFeb 1, 2026

NIMBYism Costs U.S. Workers $8,775 Annually

I found a paper that actually quantifies the amount of money that is lost by society because NIMBYism prevents NY, SF Bay Area from building enough housing for their highly productive workers: $8,775 for every worker in America every year....

By Garry Tan
California Risks Losing Future Startups to Austin, Miami
SocialJan 30, 2026

California Risks Losing Future Startups to Austin, Miami

The Atlantic acknowledges the core risk: California could lose not just current billionaires, but the next generation of startups entirely. Austin and Miami are waiting. https://lnkd.in/gdwZ97WW

By Garry Tan
Celebrating TigerEye Team’s New Chapter with Lennar
SocialJan 15, 2026

Celebrating TigerEye Team’s New Chapter with Lennar

Congrats to Tracy Young Ralph Gootee and the TigerEye Team. So proud to work with this team all these years and can't wait to see what they do as a part of Lennar.

By Garry Tan
Voting Power Triggers 50% Tax on Alphabet Founders
SocialJan 10, 2026

Voting Power Triggers 50% Tax on Alphabet Founders

Larry and Sergey can’t stay in California since the wealth tax as written would confiscate 50% of their Alphabet shares. Each own ~3% of Alphabet's stock, worth about $120 billion each at today's ~$4 trillion market cap. But because their...

By Garry Tan
Billionaire Tax Would Push Founders Out Early
SocialJan 4, 2026

Billionaire Tax Would Push Founders Out Early

In the future, should the UESF-UHW Billionaire Tax pass, startup founders like these would leave well before the valuation reaches $3B. (If founders have special founder class voting shares, that number is much lower — if you read the fine...

By Garry Tan
Jared Friedman: The Hacker‑Builder Rock of YC
SocialJan 1, 2026

Jared Friedman: The Hacker‑Builder Rock of YC

YC Managing Partner Jared Friedman is a rock. He's a hacker, builder, and true founder. It's one of my favorite things about returning to YC the last 3 years, getting to work with him.

By Garry Tan
Antitrust Should Foster Small Tech, Not Block M&A
SocialDec 27, 2025

Antitrust Should Foster Small Tech, Not Block M&A

Antitrust regulators should just allow M&A and focus on helping little tech so consumers get alternatives and keep big tech in check American antitrust policy should be about creation Support little tech, allow M&A and stop big tech structural self-preferencing instead https://t.co/HNE3w7wX4r

By Garry Tan
Federal Pre-Emption Threatens AI Innovation, Favours Big Tech
SocialDec 27, 2025

Federal Pre-Emption Threatens AI Innovation, Favours Big Tech

If you’re wondering why we should support a federal pre-emption for AI regulation, this is a case study in the idiocy that will destroy AI innovation in America, particularly for little tech Big tech can afford the army of lawyers. Startups...

By Garry Tan
Billionaire Tax Threatens California Startups, Fuels Exodus
SocialDec 27, 2025

Billionaire Tax Threatens California Startups, Fuels Exodus

Why might the proposed “billionaire tax” kill startups in California? This is simple and extreme uncertainty that will cause people to leave the state before their startup becomes successful Many will choose not to start in California at all https://t.co/yPhUDw0Tbn

By Garry Tan
California's Agglomeration Fuels Billions, Protects US Innovation
SocialDec 27, 2025

California's Agglomeration Fuels Billions, Protects US Innovation

California already has incredible agglomeration effects. It’s a thing that generates companies worth billions to trillions Why dismantle it? Startups in SF Bay succeed 2.5X more than every other place in the world. Protecting California *is* protecting American innovation

By Garry Tan
Tech Tax Could Disperse Startups Beyond California
SocialDec 27, 2025

Tech Tax Could Disperse Startups Beyond California

Ro mistakes this for a big tech tax But over a decade all of big tech won’t start in CA anymore because little tech, the startups, will start in all the other states If you want to kill the golden goose of...

By Garry Tan
Unified AI Regulation Needed to Shield Small Startups
SocialDec 19, 2025

Unified AI Regulation Needed to Shield Small Startups

America doesn’t win by making every startup navigate 50+ regulatory regimes. Fragmented AI rules become a moat helping big tech only. A coherent federal framework is how you protect safety and keep US AI advancing. This EO is a meaningful...

By Garry Tan
LLM Startup Boom Mirrors 2009 Mobile, 2003 Web
SocialDec 19, 2025

LLM Startup Boom Mirrors 2009 Mobile, 2003 Web

It’s the golden age for startups that turn latent LLM capability and intelligence into actual adoption Will be like working on mobile apps in 2009 or the web in 2003

By Garry Tan
Product Strength Beats Capital as True Business Bludgeon
SocialDec 18, 2025

Product Strength Beats Capital as True Business Bludgeon

Capital is not a bludgeon The best product is the bludgeon

By Garry Tan
Customers Choose Outcomes, Not Just Software or Platforms
SocialDec 10, 2025

Customers Choose Outcomes, Not Just Software or Platforms

People don’t want to buy software or platforms or even products They want to buy outcomes

By Garry Tan
EquipmentShare Files S-1, Signaling Upcoming IPO
SocialDec 9, 2025

EquipmentShare Files S-1, Signaling Upcoming IPO

EquipmentShare filed their S-1 today

By Garry Tan
From $1M to $100M in Two Years
SocialDec 9, 2025

From $1M to $100M in Two Years

$1M to $100M in 2 years is an incredible run

By Garry Tan