Y Combinator Startup Podcast

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.

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.

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

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

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