Latest Interviews
Showing 1–15 of 65 transcripts.
Clear all filters- Y Combinator10 min
How To Build A Company With AI From The Ground Up
This presentation argues that AI must function as a company's central operating system rather than a peripheral tool, driving a shift toward closed-loop systems that render the entire organization queryable for automated decision-making. In this model, traditional middle-management hierarchies are eliminated and replaced by AI agents that execute engineering tasks and manage workflows, allowing human leaders to focus on strategy as founders, builders, or directly responsible individuals. By leveraging these "AI software factories," startups gain a decisive advantage over incumbents to achieve tenfold velocity increases and operate with human headcount replaced by optimized token usage.
- Y Combinator20 min
The Powerful Alternative To Fine-Tuning
Ian Fischer, Mark Mandelbaum, Francesc Campoy Flores, Mark Mandelmann, Jr.
Poetic, led by co-CEO Ian Fisher, deploys a recursive Meta-System that autonomously optimizes foundation models to outperform them on benchmarks like Arc AGI v2 and the Humanity's Last Exam at a fraction of the cost. This stealth-stage platform functions as a cost-effective "stilts" for startups, achieving 9 percentage point gains over competing models while utilizing a lean team of seven scientists rather than massive training budgets. The company now invites early access from ventures seeking to integrate these self-improving reasoning strategies into their specific verticals.
- Y Combinator16 min
Inside The Startup Building Reusable Rockets
Aaron Epstein, Andy Lapsa, Tom Feldman
Stokes Space, founded in 2019 by former Blue Origin engineers Andy and Tom, is developing the Nova two-stage rocket to achieve full reusability for both orbital stages and drastically reduce launch costs. Backed by nearly $1 billion in funding and operating from a 168,000-square-foot factory in Kent, Washington, the company plans to execute its first orbital launch later this year from Historic Complex 14 in Florida. The team aims to establish daily launch cadence and ubiquitous space access by integrating in-house manufacturing with a proprietary software platform to manage rigorous testing and FAA-regulated operations.
- Y Combinator12 min
How Intelligent Is AI, Really?
Diana Hu, Greg Kamradt, François Chollet
The ARC Prize Foundation, guided by François Chollet's definition of intelligence as efficient novelty, is advancing its benchmark through the upcoming interactive Arc AGI v3, which removes all textual instructions to test agent generalization via video game-like environments. Major industry players including OpenAI, xAI, Google, and Anthropic have adopted the benchmark as a standard metric, though the Foundation explicitly warns that high scores alone do not constitute AGI and emphasizes efficiency in data and energy consumption over simple accuracy. The organization maintains a rigorous stance that true artificial general intelligence will only be declared when systems demonstrate human-level adaptability and efficiency, immediately analyzing any system achieving perfect benchmark scores for potential overfitting rather than accepting them as a final milestone.
- Y Combinator13 min
This Startup Is Trying To Delete 29% Of All CO2 Emissions
Remora has launched a solid-pellet based carbon capture system that reduces CO2 emissions by up to 90% in hard-to-electrify diesel trucks and freight trains, converting the captured gas into beverage-grade CO2 for commercial reuse. Backed by $117 million in venture capital, the Detroit-based company is vertically integrating its manufacturing to deploy modular retrofits to major partners like Ryder and Union Pacific while testing the technology on a repurposed locomotive. Co-founders Paul Gross and Christina Reynolds aim to scale this point-source solution to capture one billion tons of carbon annually by overcoming the logistical challenges of retrofitting diverse vehicle fleets.
- Y Combinator14 min
How Blake Scholl Built The First Independent Supersonic Jet
Boom Supersonic, founded by former Amazon and Groupon engineer Blake Schull, is advancing its XB-1 supersonic prototype to validate the technical feasibility of a next-generation airliner. This initiative aims to replace the Concorde with the Overture, a 65-passenger aircraft utilizing sustainable fuel and sonic boom mitigation technology to enable overland travel. By prioritizing business-class pricing and targeting commercial operations by 2029, the venture seeks to overcome the historical economic failures of supersonic flight through a lean development strategy.
- Y Combinator14 min
How To Use AI In Your Startup
The Y Combinator Spring Batch application deadline of February 11th offers selected startups a $500,000 investment and critical network access, with a strong emphasis on relocating to the San Francisco Bay Area to stay synchronized with rapidly evolving market conditions. Founders are advised to integrate large language models into their core product or operations rather than merely pivoting for trendiness, leveraging their physical proximity to industry leaders to identify automation opportunities in sectors like healthcare and legacy software replacement. Case studies such as WAPI illustrate how embedding within the SF community enabled an early pivot to voice AI, contrasting with remote companies that failed to adapt due to an informational lag in understanding current technological capabilities.
- Y Combinator20 min
How David Lieb Turned a Failing Startup Into Google Photos | Backstory
David Lieb co-founded the contact-sharing startup Bump, which was eventually acquired by Google in 2015, but his subsequent secret launch of the billion-user Google Photos product resulted in two firings before its 2015 debut. Following a 2020 leukemia diagnosis and a grueling year-long treatment regimen, Lieb transitioned from a product builder to a mentor at Y Combinator. He now leverages his history of strategic pivots and near-death survival to guide and protect the next generation of founders.
- Y Combinator14 min
You Don’t Have To Be A Billionaire To Launch Satellites
John Gedmark, Ryan MckLinko, Jason Carman
Eight years after transforming from a two-person apartment startup into a multi-billion dollar entity, Astronis became the first Y Combinator-backed company to successfully launch a commercial satellite into space. The firm, founded by John and Ryan, disrupted the $122 billion geostationary orbit market by securing a dedicated Falcon 9 launch for four low-cost satellites while internalizing critical manufacturing and testing processes at their Pier 70 facility. This historic achievement validates a strategy where scrappy engineering and a working prototype overcame traditional funding barriers, proving that regular domain experts can build successful hard tech aerospace companies without billionaire backing.
- Y Combinator18 min
Signs Your Company Is Recovering From ZIRP
Hosts define the current economic recovery from the "Zerp" era as a period marked by the elimination of vanity projects, the removal of excessive perks, and a mandatory return to office to enforce a culture of accountability. This shift involves high executive turnover and founders reclaiming operational control to replace ineffective leadership with a wartime mentality that prioritizes substantive output over comfort. The speakers advise employees to adapt to increased work intensity and stricter standards, warning that those remaining in stagnant organizations should consider leaving to join entities genuinely correcting their strategic errors.
- Y Combinator14 min
Tarpit Ideas: The Sequel
YC partners Dalton and Michael define "tar pit" ideas as market spaces that appear highly attractive but historically fail due to a lack of genuine technological shifts or fundamental behavioral changes. While Large Language Models have rendered some previously impossible ventures viable, founders must demonstrate concrete problem-solving capabilities rather than relying on social validation or assuming the first successful iteration is imminent. This dynamic framework warns against behavioral coordination failures and fast wealth arbitrage, urging entrepreneurs to rigorously validate ideas against historical precedents and actual user needs.
- Y Combinator18 min
What Is ZIRP And How Did It Poison Startups?
During the Zero Interest Rate Phenomenon, a flood of cheap capital distorted venture capital markets, prompting fund managers to chase assets under management while founders prioritized aggressive hiring and inflated valuations over product-market fit. This environment spawned a wave of unsustainable businesses that collapsed immediately when rates normalized, separating companies with viable profit models from those reliant on infinite liquidity. In response, experienced investors and accelerators like Y Combinator are now urging a return to realistic growth strategies that prioritize operational efficiency and enduring business models over market timing.
- Y Combinator12 min
Standing Up For Startups - YC Goes To D.C.
Y Combinator has established a physical presence in Washington, DC, hiring former Yelp executive Luther to lead its advocacy for "little tech," a movement supporting small, high-impact startups against the dominance of established industry giants. This initiative prioritizes policy reforms regarding skilled immigration, labor mobility, and antitrust legislation while safeguarding the legality of open-source artificial intelligence tools to prevent regulatory stagnation. By leveraging authentic narratives from its global founder network, the organization aims to counteract astroturfing and bridge technical literacy gaps within Congress to foster a more balanced innovation ecosystem.
- Y Combinator8 min
How New Technology Creates New Businesses
Leveraging historical precedents like the internet and cloud computing, the event argues that emerging technologies like AI drastically reduce capital barriers, enabling individuals to build high-leverage businesses with minimal headcount. By targeting unsaturated "green field" markets within niche online communities, founders can replicate past successes such as Flappy Bird's rapid monetization or the rise of live-streaming entrepreneurs. This strategic shift promises a structural transformation toward widespread self-employment, allowing creators to bypass traditional corporate hierarchies and establish industries before competition saturates the landscape.
- Y Combinator12 min
When Should You Trust Your Gut?
Startup guidance at YC distinguishes between founders bringing deep prior expertise, who should trust their gut to build products that impress themselves, and those building expertise, who must rely on rapid learning and customer discovery to avoid over-planning. The most frequent failure mode involves role confusion where experts chase investor trends instead of leveraging their unique vision, or novices apply complex roadmaps without validating assumptions. Consequently, advisors are urged to tailor feedback dynamically, shifting from instinct-driven validation for experts to iterative market learning for generalists to align strategy with the founders' actual capabilities.