Excited to launch Upstream and announce our $3M pre-seed round
AN INBOX DESIGNED FOR HUMANS AND AGENTS
Upstream's agents sort the noise, draft replies in your exact voice, follow up at the right time, and do what you ask, like finding receipts, scheduling meetings, or writing personalized messages
Thousands of people used it in our closed beta to handle their email. Now available to everyone
How it works: 🧵
For most of modern medicine, the question has been: what’s wrong with you?
We built Lucis to ask a different one: what if someone had looked earlier?
Today, we raised $20M Series A led by Singular, with General Catalyst and Y Combinator to serve Europe.
I'm Boris and I created Claude Code. I wanted to quickly share a few tips for using Claude Code, sourced directly from the Claude Code team. The way the team uses Claude is different than how I use it. Remember: there is no one right way to use Claude Code -- everyones' setup is different. You should experiment to see what works for you!
Forgot to update the changelog again?
Stop with the "Bug fixes & minor improvements" updates 🤮
Ship proper changelogs, it takes less than a minute now.
AI made everyone 10x faster. But the faster individuals move, the harder it is to move together.
Speed ≠ Progress when no one has the full picture.
Today we emerge from stealth with $5M led by @GeneralCatalyst to fix this.
Meet @stillaai : The first Multiplayer AI. 🧵
I get my biological markers tested every 6 months now.
One of my biggest focuses this year is to keep getting younger.
biggest contributor to this has been ONE supplement:
NAC
Our major announcement yet.
Today, @lucis_life is launching the most comprehensive preventive health check in Europe 🇪🇺
👉 110+ biomarkers (vs 70 before)
👉 €490 per year (was €899 before)
🧵
8 months. 1000 members.
Since we launched, our vision has never changed.
Give Millions Europeans access to the most advanced blood check-up in Europe.
Today, we have officially hit 1,000 members.
@lucis_life founders were back from @ycombinator and did an awesome longevity meetup in Paris. Thanks for the ice bath, longevity dinner and all the products! Can't wait to try out the blood tests and results platform.
I just returned from 11 days of international travel, during which I was sleep deprived.
It was shocking to experience how ferociously cravings for bad foods spiked.
It took me back to my early entrepreneur days when it felt impossible to stop my bad eating habits. When you're sleep deprived, you become an animal and you can do little about it.
For the first few days, the cravings were present yet manageable. By day 5, they were getting irritatingly strong and by day 9, they were overwhelming.
The science of sleep deprivation and bad decision making is solid. After one night of inadequate sleep (4 to 5 hrs):
+ PFC drops by 10-20% (self-control)
+ a hyperactive 25-30% increase to eat addictive foods
+ devalue future rewards and high risk decisions
Lose one night’s sleep and your brain’s CEO (PFC) takes a 12% pay cut while the candy-craving intern gets a 25% raise.
In just a few days time of poor sleep, I became a different person.
I chose to do this experiment as I wanted to experience the effects of sleep deprivation given that I've been sleeping very well for years now.
Sleep deprivation makes you a little insane.
Though this all, I couldn't stop thinking about how most (or all?) of our world leaders are chronically sleep deprived. Culture culture wants to demands it. It's honestly concerning.
Yesterday was @ycombinator Demo Day.
It marked the end of 3 INTENSE months.
We came in with ONE mission.
Build the future of preventive health in EUROPE. 🇪🇺
12 weeks of relentless execution:
Live in 4 countries 🇫🇷🇬🇧🇮🇪🇵🇹
Hundred of Europeans onboarded,
World-class product shipped,
And a growing movement that’s rejecting reactive healthcare.
The journey’s just starting.
and Europe is waking up to prevention.
Thrilled to have contributed to @lucis_life (YC X25) art direction and product design.
2 intense months with Max, @gm_maxg & @baptistedebever shaping the future of preventive health.
Truly impressed by their passion and dedication. Can’t wait to see what they build next!