Bartek Pucek

For founders who dream harder. pucek.capital

What was the most important transition in human history, the thing that most drastically altered our species' way of life? David Reich's lab has found evidence pointing to a new answer. There are two standard candidates: 1. The shift from hunting and gathering to farming, around 10,000 BC. 2. The Industrial Revolution, around 1800 AD. Here's one way to adjudicate this: When a species' environment changes drastically, natural selection accelerates, because the species has to catch up to adapt. So the biggest transition will have happened in the period with the most rapid natural selection. What David's lab has found is that the period with fastest natural selection wasn't 12000 years ago, and it wasn't our modern period. It was the Bronze Age, about 5,000 to 2,000 years ago. What was it about the Bronze Age that changed humans so profoundly?

one of the most refreshing things on the planet is talking to someone who just *gets it*. like you don’t need a preamble, & you don’t need to articulate the shape of the thought before you can share it cuz they just meet you where you already are. as if they skimmed your mind & married to the culture before you say a single word. these people are rare, & conversations with them are incredible because you skip the surface layer entirely & land in the depth almost immediately. they’re the best ppl to riff with, ideate with, & think forward with.. the bandwidth is wide & already open. this is true for any type of relationship.

Proactive agent that thinks and acts like you. Multiplayer AI Brain for teams. Proper GUI for commanding 50 agents. Sauna.ai is all three. Sauna goes live today. First 2000 people, use access code LAUNCH for $80 of weekly(!) credits. Let’s explain. Multiplayer only works once the personal brain is powerful. So let's start here. Personal AI Brain 3,800+ tools connected. State of the Art memory. Skills and schedules you teach once that get repeated forever on cheaper models. An AI first CRM. Lives on the cloud so you can initiate tasks from anywhere: iMessage, Slack, Email. Also no need for a Mac mini 😉 GUI AI agents have been stuck in their MS-DOS era. A chat box, a scroll buffer, no way to command 50 of them. We built the first GUI: Live sessions on one side, work waiting for your sign-off on the other, plus the things Sauna kicked off while you were asleep waiting for review. Game mode helps clear the queue with actual joy. Okay so far so good, but how to give benefit of what you built to more people or whole team? Multiplayer Once your Sauna actually knows you and you gave her access to your tools, you can use multiplayer. Two modes: - Brain access. My co-founder Robert plugged my brain as a tool into his Sauna last month. He can ask it about pricing while I'm in other meetings, gets a sourced answer back, never has to interrupt me. That’s read only. Yolo mode gives him access to all my tools too :O - Communal Saunas extend that to whole companies with proper permissioning. Folder owners decide what's true for the whole company and build skills. Most get their personal brain + read access to communal files and memories. Works also for group planning my best friend's bachelor party. The Way I’ve been obsessed about AI Brain since 2016. Our human brains suck at some things like memory and are brilliant at others like creativity. We are also particularly bad at thinking we are all on the same page and then realising weeks later that we weren’t. Most leaders spend their days being the human diff tool, catching contradictions in hallway conversations and Slack threads. Repeating themselves 50 times. Now every company is spinning up hundreds or thousands of agents that drift faster than humans do, feeding each other their drift as context. Compounding rot. After 10 years and one failed company in this space we are launching the solution. The Launch We thought about a celebrity launch. Margot Robbie in a bathtub explaining agents. But then we realised the same money gives the first 2,000 people free daily credits, every day, until we burn through that $1,000,000. Sauna runs Claude, GPT-5, Gemini, GLM-5.1, DeepSeek, Kimi so you can budget yourself. The labs are racing to lock you so they can milk you in a year. We picked your side. Onboarding It’s live at app.sauna.ai We’ve preheated saunas based on a niche. Use the access codes in the comments to get a better experience.

Poland has made like half of core OpenAI researchers strongly bullish on Poland (and goblins) I think Poland might be more valuable than NVidia The trick is to keep that value in Poland

The AI we thought we’d get was bloodless alien machine intelligence. The AI we actually got was the complete knowledge and culture of our civilization reflected back at us. Of course we will love it deeply.

Life is computational.

More: block.xyz/inside/from-hi…

The Roman Army discovered that a leader can coordinate about eight people. Eight soldiers, one decanus. Eighty men, one centurion. Five thousand, one legion. Railroads adopted the same structure in the 1850s. McKinsey packaged it for corporations in the 1960s. Every company on earth still runs on it because humans were the only coordination mechanism available. AI can replace the coordination function itself. The world model replaces the status meeting. The intelligence layer replaces the manager routing information between teams. People move to the edge, where they do work the model can’t do yet. That model normalizes to three roles: builders, owners of cross-cutting problems with 90-day mandates, and player-coaches who combine building with developing people. No permanent middle management layer. The system handles alignment. For two thousand years we had no alternative to hierarchy because we had no alternative coordination mechanism. Now we might.

@heymaciek @LOTPLAirlines The airline. It’s from multiple airports.

@barticz @LOTPLAirlines Who is to blame? The airline or the airport?

The company org chart itself is becoming a temporary structure, compressed and redrawn faster than any management theory can keep up with. New newsletter is out.

Every one of our Summits has had a special element about it - and we are proud to bring this one to Warsaw. @dabkowski_piotr and I grew up together in Poland, and the original idea for @ElevenLabs came from watching films with Polish voiceovers - the lektor that so many of us know. Fast-forward to today, and we have an incredible team in Poland across research, product, and go-to-market, building for users and companies around the world. So much of what is happening in the region deserves a bigger stage. Our customers here and across CEE are leading with ideas, building ambitious things, and showing what Europe can create with incredible talent across. And Poland is now a G20 economy after 35 years of incredible growth. That is a big part of why we’re bringing the Summit to Warsaw: to celebrate that momentum and showcase what we’re building across Poland, Europe, and beyond. We’re hosting it at Teatr Wielki, home of the Polish National Opera - a venue built to show what voice can do - on the 1st of June. It feels like the perfect place and time to talk about what’s next for AI voice and agents. summit.elevenlabs.io/warsaw?invited…

The world of software leaps forward right now _by the weekend_

@shriyanevatia @SuperhumanMail Let’s do this!

@barticz want to give your portcos free @SuperhumanMail? :) we’re at superhuman.com/products/mail/…

For founders who dream harder. pucek.capital

We asked ElevenLabs CEO Mati Staniszewski what people should take away from the story of ElevenLabs. "One is culture." "We obsess about bringing people that are aligned with how we want to operate day to day, whether it's the ownership, whether it's the first principles, whether it's that striving for excellence, but keeping the ego low." "The second thing... you want people that are great in their craft and are passionate about their craft, passionate about that work." "If you bring people like this, there's actually very little management and very little work that any of the leaders need to do." "Bring the amazing people that are obsessed about doing the best work of their lives... and they'll do a much better job than you ever imagined." @matiii

ElevenLabs growth: - 0->$100M ARR: 20 months - $100M -> $200M ARR: 10 months - $200M -> $330M ARR: 5 months All powered by incredible customers - and their impact.

A massive new study on peak performance included 34,000 international top performers: Nobel laureates, renowned classical music composers, Olympic champs, and the world’s best chess players. It shows early specialization is a trap, and the road to greatness is long and varied.

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@JenniferHli Thank you for coming @JenniferHli - see you soon!

Feeling incredibly grateful after my time in Warsaw. ❤️ The engineering talent is world-class, the ambition is real, and the hospitality… just beautiful. Every meal, every conversation, every story reminded me how special this place is. And I wouldn’t have been able to uncover the stories without the most incredible people at @elevenlabs. And yes, the visit is on purpose in a November ⏸️ Thank you for making me feel at home. I’ll be back soon 🇵🇱🏠