Samuel Spelsberg

2.9K posts

Samuel Spelsberg banner
Samuel Spelsberg

Samuel Spelsberg

@samspelsberg

fortune favors the bold. cofounder @withdelphi

SF Katılım Ağustos 2013
757 Takip Edilen1.3K Takipçiler
Samuel Spelsberg
Samuel Spelsberg@samspelsberg·
@calvinchen @MatternJustus @navidkpr congratulations! calvin moved to sf deep in a pivot for his prev. business with a different cofounder. one thing stayed the same the entire time he's got that dog
English
1
0
2
301
Calvin Chen
Calvin Chen@calvinchen·
I’m excited to introduce Proximal with @MatternJustus and @navidkpr We believe that many companies work on training data, but almost all of them are approaching it the wrong way. Historically, the biggest capability jumps came from engineers inventing scalable ways to collect domain specific data, and not from scaling up manual labor. Our core belief at Proximal is that the data needed for progress will not come from a recruiting firm or a talent marketplace, but a research and engineering organization that treats data as a problem which deserves the same level of rigor as work on training algorithms and model architectures. We think that this is the most impactful work towards agents that can autonomously solve complex technical problems, and intend to share our research and progress in the open. Since starting last year, we've grown incredibly fast and have made great technical progress. We are backed by top investors and angels from OpenAI, Anthropic, Thinking Machines, xAI, Meta Superintelligence, Google Deepmind, Cursor and Cognition. We're expanding our team and hiring researchers & engineers in San Francisco! If you want to work on data and RL for long-horizon coding agents, reach out!
Proximal@ProximalHQ

Today, we are announcing Proximal. Proximal is a research lab for data. Our core belief is that data which is complex enough to teach today’s frontier models is not bottlenecked by domain experts, but by great ideas and excellent software. We are excited about a world in which coding agents can autonomously run for multiple weeks, solve the hardest technical problems and discover novel ideas that advance progress in various domains of science and engineering. We believe that we are not far from this future, but that the biggest bottleneck preventing us from achieving it is training data. Many companies work on data, but most of them are approaching it the wrong way. Historical capability breakthroughs are the result of creative engineers discovering scalable data collection methods, not thousands of contractors manually writing task demonstrations. Inevitably, the potential impact of human data will become smaller and smaller as model capabilities increase: agents are already outperforming most humans in many domains - the number of experts that are capable of judging model outputs shrinks with every new model release. Proximal is a new data company. We are not a recruiting firm or a talent marketplace, but a research and engineering organization that treats data as a problem which deserves the same level of rigor as work on training algorithms and model architectures. We think that this is the most impactful work towards agents that can autonomously solve complex technical problems, and intend to share our research and progress in the open.

English
39
7
166
36.3K
Samuel Spelsberg
Samuel Spelsberg@samspelsberg·
@calvinchen is relentless. proud to be a tiny supporter 🫶 going to be an epic journey to be a part of
Proximal@ProximalHQ

Today, we are announcing Proximal. Proximal is a research lab for data. Our core belief is that data which is complex enough to teach today’s frontier models is not bottlenecked by domain experts, but by great ideas and excellent software. We are excited about a world in which coding agents can autonomously run for multiple weeks, solve the hardest technical problems and discover novel ideas that advance progress in various domains of science and engineering. We believe that we are not far from this future, but that the biggest bottleneck preventing us from achieving it is training data. Many companies work on data, but most of them are approaching it the wrong way. Historical capability breakthroughs are the result of creative engineers discovering scalable data collection methods, not thousands of contractors manually writing task demonstrations. Inevitably, the potential impact of human data will become smaller and smaller as model capabilities increase: agents are already outperforming most humans in many domains - the number of experts that are capable of judging model outputs shrinks with every new model release. Proximal is a new data company. We are not a recruiting firm or a talent marketplace, but a research and engineering organization that treats data as a problem which deserves the same level of rigor as work on training algorithms and model architectures. We think that this is the most impactful work towards agents that can autonomously solve complex technical problems, and intend to share our research and progress in the open.

English
1
1
3
607
Samuel Spelsberg retweetledi
Startups to Join
Startups to Join@startupstojoin·
The internet democratized distribution but not direct dialogue. We can consume an expert's podcast, scroll their tweets, or read their books, yet these interactions remain fundamentally one-directional. @SamSpelsberg believes there's a better way. He's the co-founder of @withdelphi, a company creating digital minds trained on your content and conversations. We sat down with Sam to talk about how Delphi extracts the best version of a person from mixed content sources, why interview mode unlocks the platform for creators without existing material, and how your Delphi will grow with you over time. review.startupstojoin.com/delphi/
English
0
1
4
654
Samuel Spelsberg retweetledi
Dara
Dara@daraladje·
There are two ways to build a billion-dollar company. • Join an existing market with billions in spend & capture share • Create the market yourself The investor behind Canva and Hinge says the second path is actually more reasonable. ChatGPT didn't capture existing spend. It created an entirely new category through a jaw-dropping experience that spread by word of mouth. The signal you're on this path? People who would never have paid for this type of product are now excited about yours. Nikhil Trivedi (@nbt) breaks down how in our latest episode of the Library of Minds: 3:34 - The Figma regret story 7:08 - A business’ genetics determine its fate 10:20 - 0 to $2M in 10 days is a vanity metric 10:58 - ChatGPT created new spending, didn't capture it 13:52 - Brex vs Ramp product/brand debate 15:26 - Most VCs wrongly separate consumer/enterprise 17:17 - Canva's comp is Google, not Adobe 23:20 - The darkest moment of his career 26:02 - Should you even take venture capital 31:45 - Being the only vs being the best
English
7
6
68
13.9K
Samuel Spelsberg retweetledi
Testudo
Testudo@testudoglobal·
🚀 Enterprises can now transfer AI liability risk off their balance sheet with our first insurance product live today! 🌉 Backed by Lloyd's of London capacity from Apollo, we bridge specialist underwriting with Silicon Valley technology to insure the AI economy and unlock adoption. 🛡️On the 1st January, General Liability insurance started excluding GenAI - we fill that coverage gap. If you are an enterprise deploying AI or a broker interested in distributing our product sign up below!
English
9
12
36
3.7K
Samuel Spelsberg
Samuel Spelsberg@samspelsberg·
don't forget to task your agents before u go to bed tonight
English
0
0
2
116
Samuel Spelsberg retweetledi
The Wall Street Journal
Bestselling authors like Tony Robbins and Gabby Bernstein have expanded their empires with AI chatbots promising personal advice on.wsj.com/49RtmL7
English
4
2
14
35.7K
Samuel Spelsberg retweetledi
Τobias Whetton
Τobias Whetton@TobiasWhetton·
We're hiring a Product Designer at @withdelphi ✨ Shape the future of our consumer product. Work directly with me & @JoeASobrero. Help us build our new AI-focused design system from the ground up. Is this you or know someone great? Drop them below 👇
English
69
17
502
47.9K
Samuel Spelsberg retweetledi
Dara
Dara@daraladje·
The CTO of Reddit (& architect behind the 6th most visited website on the internet) says A/B testing will make your product worse. Green metrics ≠ better product. In this week's episode of The Library of Minds, Chris Slowe (@KeyserSosa) shares the engineering decisions that led @Reddit from scrappy startup to global giant, how they navigated massive rewrites, and what it takes to build for a deeply opinionated community of millions. 02:37 How Reddit became a giant 04:27 Building for users who hate change 10:29 What tech debt really signals 15:39 The A/B testing trap 19:20 Why Reddit won't label AI content 25:15 Anonymity creates better content 27:57 Most memorable Reddit AMAs 30:11 His worst architecture decision 36:16 First YC batch: Sam Altman, Twitch founders
English
2
6
42
29.5K
Samuel Spelsberg retweetledi
Dara
Dara@daraladje·
Most "hard tech" startups fail because they choose the wrong kind of hard. @Farshchi (PhD ex-chip researcher & GP at @Lux_Capital) has spent 18 years investing in the most complex companies on earth (Zoox, Relativity Space, Mosaic). He breaks "hard" into two categories: • Scientific Risk: Fundamental discoveries that don't exist yet. • Technical Difficulty: Engineering known science into a monopolistic product. The mistake isn’t ambition. It’s underwriting discovery when the job is execution. In this week's episode of The Library of Minds, we discuss how elite deep-tech investors think about risk before metrics exist, why finding a cure for cancer means nothing without distribution, and much more! 01:16 — From PhD to Founder: Choosing Hard Problems 07:11 — The "Ask Nothing" Strategy for Breaking Into VC 11:38 — Balancing Technical Difficulty vs. Scientific Risk 13:59 — Deep Tech Startups Having One Shot 18:26 — The Controversial Mosaic Investment 23:56 — Learning to Trust The Bets You've Made 27:20 — Hard Truths About Scaling from 1 → N 31:44 — Why Money Is The Ultimate Commodity
English
6
27
123
42K
Samuel Spelsberg
Samuel Spelsberg@samspelsberg·
pagerduty and eightsleep integration to make sure that the engineering team and i don't sleep through pages
English
1
0
0
135
Samuel Spelsberg retweetledi
The White House
The White House@WhiteHouse·
BREAKING: The Trump Administration announces the 2025-2030 Dietary Guidelines for Americans, putting REAL FOOD back at the center of health. 🇺🇸 REALFOOD.GOV
The White House tweet media
English
4.3K
18.1K
93.7K
12M
Samuel Spelsberg
Samuel Spelsberg@samspelsberg·
polymarket feels like juul in 2017 right now everyone’s having too much fun someone is going to try and regulate it
English
0
0
1
97
Samuel Spelsberg retweetledi
Delphi
Delphi@withdelphi·
The Library of Minds S1 featured 12 guests who reshaped tech, product, and investing. Now, their thinking is interactive. Talk to their digital minds: @roelofbothadelphi.ai/roelofbotha @jesskahdelphi.ai/jesslee @kirstenagreendelphi.ai/kirstengreen @gokulrdelphi.ai/gokul @stanleytangdelphi.ai/stanleytang @bhalligandelphi.ai/bhalligan @madhavansfdelphi.ai/madhavansf @raboisdelphi.ai/keith-rabois @soleiodelphi.ai/soleio @zebulgardelphi.ai/delian @alramadandelphi.ai/alramadan @jboehmigdelphi.ai/jboehmig If you are a founder, builder, operator, or simply curious, you can use their digital minds to pressure-test your decisions, borrow their mental models, and challenge their unique perspective.
English
2
11
34
19.6K
Samuel Spelsberg retweetledi
Jason Boehmig
Jason Boehmig@jboehmig·
I'm convinced that @withdelphi is one of the most consequential AI companies, building at the forefront of human knowledge. It was really fun to get to spend time with chatting with @samspelsberg talking about my own journey building Ironclad. Thanks for hosting me guys!
Dara@daraladje

How a lawyer hacking together email scripts built a $3B+ category-defining company. Jason Boehmig (@jboehmig), founder of Ironclad, the contract lifecycle platform used by L’Oréal, Mastercard, Heineken, and hundreds more - never planned to be a founder. He was an associate at Fenwick writing automation hacks for himself… until curiosity pulled him into building a new category. In this week’s episode of The Library of Minds, we unpack the real story behind Ironclad’s rise: • How a hacked-together “admin@ironclad.ai” email bot became v0 • The cold inbound that changed the company’s trajectory • The early taste & hiring philosophy that shaped the culture • How to build trust when your customers can’t afford software that breaks • The poem he reads to the team every year (and why) Jason’s lesson: Taste + trust + relentless customer empathy beats everything else - especially in markets people think are “boring. 1:30 - From Fenwick lawyer to AI tinkerer → founding Ironclad 03:02 - Stepping down as CEO after 10 years 05:37 - The workflow → CLM category expansion story 08:49 - The one-line email that changed Ironclad forever 09:56 - Coding a database on a Caltrain before a customer demo 12:13 - Why category language matters for GTM 16:00 - Trust, speed, and why Ironclad hired a “professional breaker” 19:20 - Jason’s #1 interview red flag 23:26 - Poetry, Maya Angelou, and the philosophy behind Ironclad 25:52 - What makes a company enduring 31:27 - Hardest “no”: churning hundreds of YC customers

English
1
6
18
4.3K
Samuel Spelsberg
Samuel Spelsberg@samspelsberg·
jason shared a beautiful sonnet with us at his LoM "a famous sonnet about the ruins of a colossal statue in the desert, symbolizing the transience of power and the inevitable decay of all human achievements, despite the boastful inscription on its pedestal" Remember this life is fleeting. Enjoy it and enjoy this episode as much as we did making it!
Samuel Spelsberg tweet media
Dara@daraladje

How a lawyer hacking together email scripts built a $3B+ category-defining company. Jason Boehmig (@jboehmig), founder of Ironclad, the contract lifecycle platform used by L’Oréal, Mastercard, Heineken, and hundreds more - never planned to be a founder. He was an associate at Fenwick writing automation hacks for himself… until curiosity pulled him into building a new category. In this week’s episode of The Library of Minds, we unpack the real story behind Ironclad’s rise: • How a hacked-together “admin@ironclad.ai” email bot became v0 • The cold inbound that changed the company’s trajectory • The early taste & hiring philosophy that shaped the culture • How to build trust when your customers can’t afford software that breaks • The poem he reads to the team every year (and why) Jason’s lesson: Taste + trust + relentless customer empathy beats everything else - especially in markets people think are “boring. 1:30 - From Fenwick lawyer to AI tinkerer → founding Ironclad 03:02 - Stepping down as CEO after 10 years 05:37 - The workflow → CLM category expansion story 08:49 - The one-line email that changed Ironclad forever 09:56 - Coding a database on a Caltrain before a customer demo 12:13 - Why category language matters for GTM 16:00 - Trust, speed, and why Ironclad hired a “professional breaker” 19:20 - Jason’s #1 interview red flag 23:26 - Poetry, Maya Angelou, and the philosophy behind Ironclad 25:52 - What makes a company enduring 31:27 - Hardest “no”: churning hundreds of YC customers

English
1
3
12
2K
Samuel Spelsberg retweetledi
Dara
Dara@daraladje·
How a lawyer hacking together email scripts built a $3B+ category-defining company. Jason Boehmig (@jboehmig), founder of Ironclad, the contract lifecycle platform used by L’Oréal, Mastercard, Heineken, and hundreds more - never planned to be a founder. He was an associate at Fenwick writing automation hacks for himself… until curiosity pulled him into building a new category. In this week’s episode of The Library of Minds, we unpack the real story behind Ironclad’s rise: • How a hacked-together “admin@ironclad.ai” email bot became v0 • The cold inbound that changed the company’s trajectory • The early taste & hiring philosophy that shaped the culture • How to build trust when your customers can’t afford software that breaks • The poem he reads to the team every year (and why) Jason’s lesson: Taste + trust + relentless customer empathy beats everything else - especially in markets people think are “boring. 1:30 - From Fenwick lawyer to AI tinkerer → founding Ironclad 03:02 - Stepping down as CEO after 10 years 05:37 - The workflow → CLM category expansion story 08:49 - The one-line email that changed Ironclad forever 09:56 - Coding a database on a Caltrain before a customer demo 12:13 - Why category language matters for GTM 16:00 - Trust, speed, and why Ironclad hired a “professional breaker” 19:20 - Jason’s #1 interview red flag 23:26 - Poetry, Maya Angelou, and the philosophy behind Ironclad 25:52 - What makes a company enduring 31:27 - Hardest “no”: churning hundreds of YC customers
English
4
6
47
44.1K