general partner @ycombinator. previously product @airbnb
San Francisco
Joined July 2006
- Tweets12.4K
- Following5.7K
- Followers36.8K
- Likes25.7K
Gustaf Alströmer retweeted
Churchill could have shortened WW2 by years if he had just “done a deal” with Hitler. George Washington could have done a deal to end the American Revolution. Zelenskyy is in good company.
Gustaf Alströmer retweeted
@sequoia is leading our Series C at a $1B valuation.
We started Blacksmith in 2024 to make CI faster and less painful. In January we ran 5 million CI jobs a week. Today it's over 90 million and growing, and we’re still early.
ALT Line chart of weekly CI jobs run on Blacksmith, growing from 5.4M in January to 90.5M in October 2026.
I just stepped out of Legora’s NYC office. Hard to describe how special it is to see hundreds of people working on something that Max, Sigge, and Jake once only had each other to believe in. They will win this and everyone who doesn't know yet will know soon.
And they're hiring for all roles in NYC but especially engineers and product. legora.com/careers – at Hoboken, NJ
We have raised a $550M Series E at an $8.8B valuation, led by Atreides.
Every major existing investor is back in, and we’re welcoming Baron Capital, Capital Group, Fidelity, Glade Brook and J.P. Morgan. We picked investors who think in decades. Several of them work with law firms and legal teams every day, so they can see where the work is heading.
Lawyers are moving from AI assistants to agents that do multi-step work. The money goes there. We’re growing our teams across North America, Europe, Latin America and Asia-Pacific, and going deeper on the Legora aOS.
Thank you to the 1,000+ people at Legora, and to the 140,000 legal professionals who use what we build.
I say this a lot because I believe it: it’s the best time in history to be a lawyer. We're thankful to be a part of it.
Full story: legora.com/blog/series-e
Gustaf Alströmer retweeted
Congrats to @MaxJunestrand, @siggelabor, and @WeAreLegora (W24) on their $550M Series E at an $8.8B valuation!
Legora’s agentic operating system is where more than 140,000 legal professionals and their AI agents do legal work together.
They went from $1 million to $100 million in ARR in under 18 months, and the next $100 million took less than six. The US, where Legora opened its first office in spring 2025, is now their largest market by revenue, with more than half of the AmLaw 50 as customers.
legora.com/blog/series-e
Gustaf Alströmer retweeted
We have raised a $550M Series E at an $8.8B valuation, led by Atreides.
Every major existing investor is back in, and we’re welcoming Baron Capital, Capital Group, Fidelity, Glade Brook and J.P. Morgan. We picked investors who think in decades. Several of them work with law firms and legal teams every day, so they can see where the work is heading.
Lawyers are moving from AI assistants to agents that do multi-step work. The money goes there. We’re growing our teams across North America, Europe, Latin America and Asia-Pacific, and going deeper on the Legora aOS.
Thank you to the 1,000+ people at Legora, and to the 140,000 legal professionals who use what we build.
I say this a lot because I believe it: it’s the best time in history to be a lawyer. We're thankful to be a part of it.
Full story: legora.com/blog/series-e
Gustaf Alströmer retweeted
We have raised a $550 million Series E at a $8.8B valuation to accelerate our growth in the U.S. and globally, and deepen investment in the Legora aOS, our agentic operating system for legal work.
@Atreidesmgmt leads this round, alongside new investors @BaronCapital, @CapitalGroup, @Fidelity, @GladeBrookCap, and @jpmorgan. Every major existing investor is participating. We’re grateful to have partners who share our ambition and our long-term view.
We build AI together with the people who use it. That’s always been our approach. Our customers help shape what we build, pushing us to go further on the work that matters.
This is the most exciting time in history to be a lawyer, and we’re lucky to be in the middle of it.
Read the full release: legora.com/blog/series-e
Gustaf Alströmer retweeted
Greptile has raised a $50M Series B led by Menlo Ventures. The round values the company at $750M.
Greptile reviews and tests more than 1% of all PRs opened on GitHub every day. Thousands of engineering teams including Nvidia, Coinbase, Decagon, and Vanta use Greptile as their independent and central validation layer.
Fewer than 50 people, we are a small, talent-dense team of engineers and researchers in a quiet corner of San Francisco. If you’re interested in joining us, we’d love to hear from you.
Gustaf Alströmer retweeted
The SF homelessness trap, simply:
Advocates convince liberals they're helping locals priced out of housing. The city spends billions on housing and services. But many recipients are drug users from outside SF.
Users attract dealers. Drugs stay cheap, services stay generous, and more people come. Cartels see this and bring in cheap fentanyl. Problem explodes.
Advocates mean well, but the unintended consequences are too great. The money we spend on housing, treatment, and healthcare for out-of-town drug users could go to San Francisco Kids & Schools.
Gustaf Alströmer retweeted
"Wiener is the hardest working and most effective politician I’ve covered in my seven-newspaper, 25-year career as a California journalist." sfstandard.com/opinion/2026/…
I think the driver for the US to have a chance to catch-up here is with autonomous electric cars – at San Francisco, CA
Electrification is energy security, national security, improved public health, better products and healing our climate. This should not be partisan issue – at San Francisco, CA
Gustaf Alströmer retweeted
Some news I’ve been excited to share: @gonzalosm7 is officially a co-founder of @gumloop
Gonzalo joined us two years ago as employee #5, back when Gumloop was a simple workflow platform. He was a key part of re-founding the company as the agent-building platform our customers know and love today.
Since then, we’ve 9x’d headcount and built a product that has automated over 1.3 billion tasks with Gonzalo leading our product and design teams the entire way.
More than that, he’s become the third voice in the room when the hard decisions get made. The title is just catching up to the role he’s been playing.
@rbehal1729 and I couldn’t be more excited to make it official. Congrats, Gonzalo!
Gustaf Alströmer retweeted
The mood in Ukraine is grim today. There's frustration and outrage here in Kyiv towards the Trump administration over what Ukraine's government, the troops and society believe is a deliberate attempt on the part of Washington to force Ukraine to capitulate to Russia – by withholding intelligence that allows early warning when Russian missiles are incoming, and cutting off Starlink to the military which needs it to strike and for defence against jet drones. These decisions cut intel sharing and restrict Starlink cost lives; at least 5 people killed in Kyiv, 6 more in Lutsk, dozens others badly injured.
NEW: Ukrainian troops have been caught off guard by restrictions on Elon Musk’s Starlink satellite internet systems that disrupted frontline operations, as Kyiv received no advance warning from its partners of a Russian missile attack on its energy facilities for the second day running, Ukrainian officials and troops tell @FT.
ft.com/content/37085602-726a…
Gustaf Alströmer retweeted
Allowing Russian diesel fuel to be sold freely in global markets, including in the United States, weakens American security interests and helps fund Putin’s ongoing invasion of Ukraine.
Today, I joined 11 of my Senate colleagues in a bipartisan letter to @POTUS urging him to rescind this deal with Putin. We must maintain economic pressure to keep our negotiating position strong and protect vital U.S. national security interests.
Gustaf Alströmer retweeted
Exa just passed $100m in annualized revenue.
We've grown almost exactly 10x per year for 3 years. We now handle 2 billion requests a month from 200k+ teams. And it’s still so early:
We predict agents will search 1000x more than humans by 2030.
Agents don't search like humans. They write long, complex queries and want all the world's data, not just the web. We've spent 5 years building a search engine designed for them.
We now serve personal agents, AI labs, coding agents, GTM agents, really any agent. Exa gives these agents access to 100s of billions of web documents and tons of proprietary data.
Our customers are increasingly noticing that information is the bottleneck to agent performance. While the world seems close to perfect intelligence with models like Fable and Astra, we are very far from perfect information.
To our small but legendary team, thank you for getting us here, from engineering to research to GTM to ops.
To our customers, it is an honor to serve you. We have some exciting releases coming soon and can't wait to share them 🫡
Gustaf Alströmer retweeted
It is sickening that the USA is now lifting sanctions on Russian fuel, and transparently ridiculous to blame Ukraine for the spike in prices that obviously began with the closure of the Strait of Hormuz. Putin is murdering innocent Ukrainian civilians every day. The Ukrainians are fighting for their lives. And yet the White House is apparently determined to force American drivers to bankroll Putin’s slaughter. It won’t work and I doubt it will make much difference to the price of fuel.
If we want Russian oil and gas back on the world market then let’s end this war - with a free, sovereign and independent Ukraine.
Gustaf Alströmer retweeted
Sweden's position is the same as it has been since February 24 2022: we will stand with Ukraine for as long as it takes. Now more pressure needs to be put on Russia and more support needs to be provided for Ukraine.
We regret the US agreement with Russia to supply diesel, as energy revenues are a vital source of funding Russia’s war of aggression.
On Monday, the EU will adopt the largest sanctions package to date, listing 1,600 entities in the Russian military industrial complex. This is - in contrast - a welcome step.
More countries also need to do more against the shadow fleet and eventually make use of the frozen Russian assets to the benefit of Ukraine. In all of this, we need to stay closely coordinated in the EU and with the US, UK and other international partners.
The broad political and popular support in Sweden for Ukraine is a strength and an asset in these turbulent times. Sweden stands with Ukraine, and Ukraine’s freedom and sovereignty remains our foremost foreign policy priority.