Gustaf Alströmer
@gustaf
general partner @ycombinator. previously product @airbnb
Applications for the YC Fall 2025 batch are now open! Apply by August 4: ycombinator.com/apply
9 years to get to $10M ARR; 9 months to $100M+. Replit is a story of a founder with a vision finally unlocked by AI.
Amjad Massad (@amasad) started Replit to make programming accessible to anyone, anywhere. What began as a tool for learning to code has grown into a platform pushing the limits of AI-assisted software creation and recently surpassed $100M in ARR. On The Breakdown with @t_blom…
Lovable just raised $200M at a $1.8B valuation led by Accel. This all started unexpectedly with me calling my friend at 6AM to go for a walk. I've never shared this story before: (thread)
Introducing Circleback Assistant Ask a question and Circleback will agentically search every meeting you have access to and give you an answer with cited sources.
exactly 3 weeks ago, at the end of office hours, @gustaf asked if we had anything to demo for YC Launch Live. we said yes, without knowing what we'd actually demo yet. on the way back we decided we'd demo the agentic assistant we'd been wanting to build for a while. last week,…
Introducing Circleback Assistant Ask a question and Circleback will agentically search every meeting you have access to and give you an answer with cited sources.
Internet search traffic for health information has dropped precipitously, the outlier vs drop in all other categories, as chatbots and genAI take hold economist.com/business/2025/…
Take private, 50% pay cut for anyone who isn't a licensed pilot or engineer/technician (cumulative), HQ now in the middle of the factory in Seattle, no remote work, cancel Starliner, SLS, and any other program that doesn't serve the interests of both the US, the customer, and the…
You become CEO of Boeing. What are you doing first?
Reminder - if you’re a developer who wants to make government work better - let’s chat this Thursday: promise-pay-5332344.hs-sites.com/engineering-fo…
I'm a San Francisco Democrat I got involved in local politics because of my mentor Nancy Tung, the chairwoman of the SF Democratic Party. I support public transit, I support building market-rate and affordable housing (YIMBY), and our work building the world's best new tech…
This guy thinks cutting MUNI, building luxury housing, and empowering people like Elon Musk are going to save everyday people. One of the techno fascists making SF that much more unaffordable for everyday people
In June 2025, Germany produced a record 11.8 TWh from solar ☀️ If this had been produced by coal (as it was in the past), Germany would have had to burn an additional 6 million tonnes of coal! 🔥 That's ~3000 full trainloads... or enough to fill 50 Bundestag buildings with coal
I’m hiring engineers to join my Tesla App for @teslaenergy and @TeslaCharging We work on almost all of the Tesla app: Powerwall, Solar, Supercharging, VPPs, ecosystem integrations, IoT, distributed systems, and more 🧵
This @ycombinator W24 Group Office hours group was pretty stacked in hindsight: Legora, ModelML, Gumloop, Circleback, AndyAI, Penciled, Latern, and Marr Labs.
It's a tremendously good thing that so many smart people are racing against each other to deliver smarter models at lower cost.
Grok 4 looks very strong. Importantly, it has a mode where multiple agents go do the same task in parallel, then compare their work and figure out the best answer. In the future, the amount of intelligence you get will just be based on how much compute you throw at it.
Join us in NYC next week for an inside look at YC with General Partner @aaron_epstein! Whether you’re actively building a startup or just considering taking the leap, come to learn more about how we support founders, what we look for in startups, and ask questions. Expect honest…