Latest Interviews
Showing 1–12 of 12 transcripts.
Clear all filters- Y Combinator36 min
The Case For Data Centers In Space
Philip Johnston, Mark Mandelmann
Founded by Philip Johnston in 2024 and backed by a $170 million Series A from Benchmark, StarCloud has emerged as YC's fastest-growing unicorn by pioneering orbital data centers to bypass terrestrial energy constraints. The company successfully launched its first satellite in November 2025, deploying custom-modified GPU hardware and thermal management systems to run AI models like Gemini while utilizing automotive-grade components to mitigate radiation risks. With plans to scale to 88,000 satellites by 2028 and deploy high-bandwidth compute for government and hyperscale customers, StarCloud aims to eventually generate terawatts of processing capacity through partnerships with SpaceX and NVIDIA.
- Y Combinator44 min
He Built the World's #1 Open-Source Coding Agent
Jay V, Gary Tan, Mark Mandelmann, Seth Vargoevic, Frank, Dax, Dylan Patel, Soyal, PG, Jay Poldinger
OpenCode, a sixteen-year-old platform founded by Jay Poldinger and Frank, has grown to 13 million monthly active users and processes 7 trillion daily tokens by serving as a neutral model harness that bypasses vendor lock-in. The company's strategy of supporting over 70 open-source models, which became critical after Anthropic restricted open usage, generated $160,000 in monthly subscription revenue and an estimated $33 million in inference revenue as of June. With significant adoption in China, Brazil, and the United States, OpenCode validates its product-market fit through enterprise organizations that proactively seek security agreements to integrate its agent loops into internal workflows.
- Y Combinator43 min
The Age Of The 40-Year-Old Solo Founder Is Here
Bryant Chou, Jared, Diana, Mark Mandelmann, Francesc Campoy Flores
Co-founded by ex-Webflow leader Bryant Cho, Ploy is an AI-driven platform that reconstructs and modernizes websites while autonomously managing marketing operations through a curated design system. The technology replicates the output of a three-to-five-person engineering team, processing complex tasks like SEO optimization and data auditing in seconds rather than weeks. Currently adopted by 12% of the Y Combinator batch, the tool democratizes high-level growth strategies by integrating with over 50 business tools to function as a unified, AI-optimized company brain.
- Y Combinator45 min
How This 25-Year-Old Built A $675M Legal AI Startup (With No Legal Experience)
Gustaf Alströmer, Max Junestrand, Mark Mandelmann, Martin Splitt
Founded in 2024 by Max Giunestrand, Legora is an AI-powered workspace for legal professionals that recently secured an $80 million Series B funding round led by Iconic and General Catalyst. The company differentiates itself through a "software + service" hybrid model and a data-centric architecture that ensures GDPR compliance by hosting all European client data within the EU. With a flat organizational structure that scaled from ten to 100 employees in less than a year, Legora is aggressively expanding its operations to hubs in New York, London, and Stockholm to support law firms in navigating the AI transition.
- Y Combinator49 min
How AI Is Changing Enterprise
Aaron Levie, Gary, Jared, Harj, Diana, Mark Mandelmann, Mark Mirchandani, Mark Mandalini, David Eastman, Melanie Warrick
Industry leaders assert that sustainable AI startups must evolve into software companies delivering proprietary business logic rather than relying on simple model wrappers, a shift driven by the economic reality that intelligence is becoming commoditized. This transition is fueled by Jevons Paradox, which predicts that lower costs will expand the total addressable market by enabling enterprises to automate previously unaffordable workflows while shifting pricing models toward usage-based structures. Consequently, Fortune 500 organizations are rapidly adopting AI-native strategies focused on core intellectual property, leveraging agentic workflows to reinvest efficiency gains into growth rather than workforce reduction.
- Y Combinator34 min
The 10 Trillion Parameter AI Model With 300 IQ
Leslie Kendrick, Mark Mandelmann, Jared, Harj, Paul Lewis O'
OpenAI recently secured a historic $6.6 billion funding round to accelerate the development of 10 trillion parameter models that promise to match human genius-level intelligence in scientific discovery and software engineering. While the O1 model achieves near-perfect accuracy for knowledge worker tasks, market dynamics are shifting as competitors like Claude and Llama gain significant developer share and startups rapidly adopt agentic coding tools like Cursor. This capital-intensive scaling strategy aims to overcome current latency and cost barriers, potentially transforming enterprise operations by replacing legacy systems with autonomous AI workflows.
- Y Combinator37 min
Now Anyone Can Code: How AI Agents Can Build Your Whole App
Amjad Masad, Jared Harge, Diana, Mark Mandelmann, Zahid Ali Jeelani, Francesc Campoy Flores, Franc Espinosa, Mark Manderson, Mark Mandelbacher, Mark Mandalbach, Amjad Ali Khani
Replit has unveiled the Replit Agent, a multi-system that builds full-stack web applications from natural language prompts using a specialized orchestration of Claude Sonnet 3.5 and GPT-4.0 models. This early-access beta enables rapid development of complex projects like mood tracking dashboards while co-founder Amjad Ali frames the technology as a step toward AGI that necessitates a symbiotic human-AI workflow. Future iterations aim to expand stack agnosticism and visual interaction modes while maintaining the tool within Replit Core subscriptions to manage significant computational costs.
- Jane Street1h 6m
The Uncertain Art of Accelerating ML Models with Sylvain Gugger
Sylvain Gugger, Ron Minsky, Jeremy Howard, Mark Mandelmann, Mark Mirchandani, Francesc Campoy, Gabriel Sanchez
Former fast.ai co-author Jeremy Howard discusses his transition from mathematics education to optimizing machine learning infrastructure at Jane Street, highlighting breakthroughs in learning rate schedules and image resizing that previously secured top benchmark placements. He details the development of the Hugging Face Accelerate library, a lightweight tool designed to abstract complex hardware parallelism and eliminate boilerplate code for training across diverse GPUs and TPUs. The discussion further explores the architectural constraints of financial data, the dominance of PyTorch's iterative execution model, and Jane Street's rigorous approach to reproducibility and custom model development for high-frequency trading.
- a16z46 min
How Discord Became a Developer Platform
Jason Citron, Anjney Midha, Mark Mandelmann, David Malani
Discord has grown to serve over 200 million monthly active users, leveraging a recent shift in developer activity that generated more than 20,000 new activities via its Embeddable Apps SDK. This platform evolution, driven by CEO Jason Citron's strategy to prioritize community feedback and open architecture, now allows startups to deploy rich HTML5 applications directly within the ecosystem while utilizing new one-click payment features for monetization. As a result, development friction has decreased significantly, enabling a projected surge from 20,000 to 200,000 apps within a single year as the platform transitions from a gaming chat tool into a comprehensive hub for the generative AI and interactive metaverse.
- Y Combinator41 min
Better AI Models, Better Startups
Gary, Jared, Harj, Diana, Melanie Warrick, Mark Mandelmann, Mark Blythington, Joel Morton, Jordan, Francesc Campoy Flores, Carrie Nordlund
The event analyzes a strategic shift where startups can thrive by building specialized vertical B2B tools and niche consumer products rather than competing with major labs on general-purpose interfaces. It highlights how advanced capabilities like massive context windows and multimodal reasoning create new opportunities in sectors such as robotics, legal tech, and personalized agents while maintaining RAG infrastructure for enterprise data control. Ultimately, the consensus advises founders to leverage these model improvements to automate complex workflows, citing historical precedents where specialized players succeeded by avoiding head-on competition with tech incumbents.
- Jane Street1h 23m
Memory Management with Stephen Dolan
Stephen Dolan, KC Sivaramakrishnan, Ron Minsky, Mark Mandelmann, Simon Hughes, Matt Sullivan, Mark Blyther, Paul Lewisohn, Simon Verstraeteker
Stephen Dolan discusses advanced optimizations in the OCaml language, detailing how generational, incremental garbage collection and software pre-fetching reduce memory access latency by up to 90%. He introduces local types and unboxed representations to enable safe stack allocation and native memory layouts, thereby eliminating heap overhead for temporary values while maintaining automatic memory safety without manual lifetime annotations. The presentation concludes with a roadmap for integrating multi-core garbage collection and lifting GC barriers to support denser data structures, balancing performance with ergonomic simplicity.
- Y Combinator48 min
Mathilde Collin on Feature Prioritization and Employee Retention at Front
Mathilde Collin, Craig Cannon, Tuomas Grannas, Jordan Jackson, Tomas Granos, Mark Mandelmann, Gabrielle Tcheyani, KP
Front, a shared inbox collaboration platform founded by Gabrielle Tcheuyani and Laurent, transforms email into a team workflow tool by integrating individual inboxes and external applications like Salesforce and GitHub. The company achieved its initial market traction through content marketing and manual onboarding before securing product-market fit and reaching $1.5 million in ARR by the Series A round. Guided by a "Work Happier" mission, Front prioritizes radical transparency, employee well-being, and a unique product philosophy that discards legacy email structures in favor of fluid conversation threads and automation.