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Y Combinator

We help founders make something people want. The Y Combinator Podcast is where builders talk about building. From the earliest days of an idea to scaling a company that changes the world, YC partners and founders share real stories, lessons, and tactics from the frontlines.

YC Visiting Partner Vivian Shen sits down with Paul Graham at the original YC office in Mountain View to talk about startups, AI, ambition, and what makes great founders.

Paul Graham On Startups, Ambition, and Great Founders

Heart Aerospace (YC W19) just flew the largest electric airplane ever flown — a 100-foot wingspan, a takeoff weight of 25,000 pounds, and $5 of electricity to get it off the ground.

In this episode of Hard Tech, YC's Gustaf Alströmer visits Heart's pilot plant in LA and sits down with co-founder and CEO Anders Forslund to find out how they went from a 3D-printed model to a full-scale electric aircraft in seven years, why the jet engine has left short flights behind, and what cheap electric flight could unlock for the future of regional air travel.

The World’s Largest Electric Aircraft Just Flew

Today, more than 3% of the world’s lawyers use Legora, and the company has grown from $1 million to $100 million in ARR since launching in October 2024.At Startup School 2026, Legora co-founder and CEO Max Junestrand shares how they built one of the fastest-growing enterprise software companies in the world, from cold emailing lawyers and moving into a customer’s office to freezing sales for six months to rebuild the product. He explains why building a company is ultimately about people, how to create a culture that wants to win, and why founders have to learn to love the hustle.Transcript: https://www.ycrootaccess.com/p/max-junestrand-you-need-the-willingness

Max Junestrand: You Need The Willingness To Learn Faster Than Anyone Else

Susan Kare joined Apple as an art history PhD who barely knew anything about computers. She went on to design many of the icons, typefaces, and symbols that helped make the original Macintosh feel understandable and human, defining a visual language for personal computing that still influences software today.At Startup School 2026, Susan shares the stories behind the Happy Mac, Command key, Chicago font, and more, along with the design lessons she learned from Steve Jobs, Paul Rand, and the original Mac team: make things meaningful and memorable, embrace constraints, iterate constantly, and use just enough detail to make an idea instantly clear.Transcript: https://www.ycrootaccess.com/p/susan-kare-on-designing-the-original

Susan Kare: Designing Icons & Graphics For the Original Mac

Robots can already fold laundry, make espresso, clean kitchens, and assemble things. The harder problem is getting them to do those tasks reliably, for long periods of time, without a human babysitting them.

At Startup School 2026, Physical Intelligence cofounder Chelsea Finn explains what it takes to build general-purpose robots that work in the real world. She shares how reinforcement learning pushed robot throughput up 2x, how their systems can run autonomously for hours, and why she believes robotics is entering its GPT era: moving from specialized models toward general-purpose systems that can work across tasks, robots, and environments.

Transcript: https://www.ycrootaccess.com/p/chelsea-finn-on-the-next-decade-in

Chelsea Finn: This is the State of the Art in Robotics

Last November, Peter Steinberger was annoyed that there was no good way to talk to his coding agents from his phone, so he built one himself. A few months later, OpenClaw had exploded into one of the biggest open source AI projects in the world, with nearly 3,000 contributors and a peak of 4.7 million weekly downloads.At Startup School 2026, Peter tells the story of what happened when OpenClaw took off, what he got wrong as it grew, and how he eventually stopped using the product he had built for himself.He shares why the best products often start with something that annoys you, why focus matters more as building gets easier, and why, in his words, “fun is velocity.”Transcript: https://www.ycrootaccess.com/p/peter-steinberger-what-happens-when

Peter Steinberger: "Fun Is Velocity"

Science is building a retinal implant that restores vision to people who have gone blind. One patient has already used it to read a 300-page novel.Building a company like that requires a lot more than getting the technology right. At Startup School 2026, Science CEO Max Hodak explains how the company buys things and hires people, and why those systems determine how fast it can move.He also gets into why founders can’t delegate their judgment, and why there’s no set of five bullet points that makes a startup work.Transcript: https://www.ycrootaccess.com/p/max-hodak-there-are-no-blanket-rules

Max Hodak: How Startups Build Speed

AI isn't just changing the tools designers use. It's changing how they build, ship, and stand out. 

In this episode of Design Review, Stephen Haney, founder of AI-native design tool Paper, joins YC General Partner Aaron Epstein to demo the agent-first workflow that's making Paper one of the fastest-growing design tools since Figma. 

Using live redesigns of user-submitted websites as examples, they break down the most common AI design tells, show how to fix them in seconds, and explain why the biggest risk for founders isn't moving too slow, it's shipping something that looks like everyone else.

How To Design In The Agent Era

The next generation of startups will be built by smaller teams than ever before.

At Startup School 2026, YC President & CEO Garry Tan explains why we're entering the era of personal AGI: AI agents that run on your own infrastructure, compound your knowledge over time, and dramatically increase your ability to build. He shares the tools and workflows he uses every day, why every founder should own their intelligence instead of renting it, and what it means to build under your own power.

Transcript: https://www.ycrootaccess.com/p/garry-tan-own-your-intelligence

Garry Tan: Own Your Intelligence

Philip Johnston is the co-founder and CEO of Starcloud, the company building data centers in space. 

In November 2025, Starcloud launched an Nvidia H100 GPU into orbit and trained the first large language model in space. They've since raised $200 million, hit a billion-dollar valuation just 17 months after YC demo day, and filed with the FCC to deploy 88,000 more satellites. 

In this episode, Philip walks us through their wild origin story, the engineering challenges behind the Starcloud-1, why they booked a SpaceX launch before they even knew what they were building, and how data centers in space make sense both economically and politically.

Building the First Data Centers in Space

NVIDIA started with the wrong technology, learned the right one from three textbooks bought at Fry’s, and went on to invent most of the major breakthroughs in modern computing.At Startup School 2026 at Chase Center, Garry Tan sits down with Founder and CEO Jensen Huang to talk about confronting reality, learning your way into new domains, and why resilience — getting through one day at a time — matters more than anything else.

Jensen Huang: The Mindset That Built NVIDIA

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