Brad Feld
Co-founder of Foundry Group and of Techstars. Has blogged at Feld Thoughts since 2004 and has written or co-written nine non-fiction books on startups and venture capital.
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What they believe
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Things are understood better from books than from newspapers, television, or social media.
I’ve also always understood things better from books than from newspapers, television, or social media.
feld.comSaid 14 Oct 2026This on korrents
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Incompatible, walled-off vendor systems that refuse to interoperate are a form of enshittification.
all you need to know is that none of these systems talks to any of the others, which is enshittification in action.
feld.comSaid 4 Sept 2026This on korrents
The bold line is korrents’ wording; the quote is theirs. These 2: what they wrote before what they said aloud, one per source, newest first.
Feed
As its own page →Hiding
16 October
14 October
From one piece Gell-Mann Amnesia, Without the Amnesia 2 beliefs · feld.com
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korrents.com
The political shift in the Bay Area and among many in tech has been developing in plain sight for over a decade.Their words
The political shift in the Bay Area and among many in tech felt dramatic and sudden to me, but as I read the book, I realized it had been developing in plain sight for over a decade.
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korrents.com
Things are understood better from books than from newspapers, television, or social media.Their words
I’ve also always understood things better from books than from newspapers, television, or social media.
10 October
6 October
5 October
- x.com
- BlogFounded Colorado
4 October
3 October
30 September
29 September
28 September
5 September
4 September
From one piece Overwatch: One Home Automation Dashboard to Rule Them All 2 beliefs · feld.com
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Their words
I long for the halcyon days of early Web 2.0 when it was predicted that all APIs would work with everything and data and control would belong to the user. Oh well - that didn't happen.
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korrents.com
Incompatible, walled-off vendor systems that refuse to interoperate are a form of enshittification.Their words
all you need to know is that none of these systems talks to any of the others, which is enshittification in action.
3 September
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Lovedrcmnd.app
J. Geiger shadesTheir words
We have shades from J. Geiger
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Dislikedrcmnd.app
SavantTheir words
One of them is a Savant system that both Amy and I are sick of because it’s so pathetic.
9 August
From one piece The Argument Against AI Writing Is At Least 2,400 Years Old 2 beliefs · feld.com
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korrents.com
The ethical failure in using AI to write is publishing unread, unowned work, not using the tool itself.Their words
The transgression isn't using the machine. It's hitting a button, not reading what comes back, and publishing it under your name.
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korrents.com
New technologies raise the ceiling for skilled practitioners instead of diminishing them.Their words
What actually happened each time a new technology was introduced is that the ceiling went higher.
26 July
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Their words
world building can't simply be decoration. It has to be integral to the plot.
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Lovedrcmnd.app
Dungeon Crawler CarlTheir words
I’ve savored this series for the past eight months, listening to about one a month on Audible while I run.
24 July
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korrents.com
A reader's own mental image of a character is as valid as the author's depiction of them.Their words
Some readers like this, others don't, and if the Samantha in your head looks nothing like the one on the page, yours is the correct one.
19 June
From one piece Read Zero Knowledge As I Write It 2 beliefs · feld.com
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korrents.com
Getting feedback on a flaw early saves far more effort than discovering it after building much more on top of it.Their words
I would rather learn a chapter is broken now, from you, than after I've built ninety more on top of it.
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korrents.com
Doing creative work in public, where failures are visible, produces faster useful feedback.Their words
I'm doing it in public, where the failures show and crap gets feedback quickly so I can improve.
17 June
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korrents.com
Entrepreneurial ecosystems are built by the entrepreneurs who lead them, take a long-term view, and give first.Their words
a great entrepreneurial ecosystem is built by the entrepreneurs who lead it, take a long-term view, and give first.
15 June
From one piece Does the Rule of 40 Work for Hardware? 2 beliefs · feld.com
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korrents.com
A hardware company can be doing everything right and still fail the Rule of 40 for years.Their words
A hardware company doing everything right can fail the Rule of 40 for years.
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Their words
the market rewards growth until it doesn't, and then it rewards profitability.
14 June
8 June
Nothing matches.
Beliefs
Korrents What they believe 13 beliefs — each backed by an exact quote.
Each is a — compiled by korrents.com, not by them: the one-line wordings are korrents', the quotes are theirs.
Recent
Things are understood better from books than from newspapers, television, or social media.
I’ve also always understood things better from books than from newspapers, television, or social media.
Gell-Mann Amnesia, Without the Amnesia Said 14 Oct 2026
The political shift in the Bay Area and among many in tech has been developing in plain sight for over a decade.
The political shift in the Bay Area and among many in tech felt dramatic and sudden to me, but as I read the book, I realized it had been developing in plain sight for over a decade.
Gell-Mann Amnesia, Without the Amnesia Said 14 Oct 2026
Incompatible, walled-off vendor systems that refuse to interoperate are a form of enshittification.
all you need to know is that none of these systems talks to any of the others, which is enshittification in action.
Overwatch: One Home Automation Dashboard to Rule Them All Said 4 Sept 2026
Show 10 more
The early Web 2.0-era promise of universal API interoperability and user ownership of data and control never materialized.
I long for the halcyon days of early Web 2.0 when it was predicted that all APIs would work with everything and data and control would belong to the user. Oh well - that didn't happen.
Overwatch: One Home Automation Dashboard to Rule Them All Said 4 Sept 2026
New technologies raise the ceiling for skilled practitioners instead of diminishing them.
What actually happened each time a new technology was introduced is that the ceiling went higher.
The Argument Against AI Writing Is At Least 2,400 Years Old Said 9 Aug 2026
The ethical failure in using AI to write is publishing unread, unowned work, not using the tool itself.
The transgression isn't using the machine. It's hitting a button, not reading what comes back, and publishing it under your name.
The Argument Against AI Writing Is At Least 2,400 Years Old Said 9 Aug 2026
World-building in fiction cannot be mere decoration — it must be integral to the plot.
world building can't simply be decoration. It has to be integral to the plot.
What the Actual Fuck, Carl Said 26 Jul 2026
A reader's own mental image of a character is as valid as the author's depiction of them.
Some readers like this, others don't, and if the Samantha in your head looks nothing like the one on the page, yours is the correct one.
Zero Knowledge: Twenty Chapters In Said 24 Jul 2026
Doing creative work in public, where failures are visible, produces faster useful feedback.
I'm doing it in public, where the failures show and crap gets feedback quickly so I can improve.
Read Zero Knowledge As I Write It Said 19 Jun 2026
Getting feedback on a flaw early saves far more effort than discovering it after building much more on top of it.
I would rather learn a chapter is broken now, from you, than after I've built ninety more on top of it.
Read Zero Knowledge As I Write It Said 19 Jun 2026
Entrepreneurial ecosystems are built by the entrepreneurs who lead them, take a long-term view, and give first.
a great entrepreneurial ecosystem is built by the entrepreneurs who lead it, take a long-term view, and give first.
RIP Josh Baer Said 17 Jun 2026
Markets reward growth until it stalls, then they reward profitability instead.
the market rewards growth until it doesn't, and then it rewards profitability.
Does the Rule of 40 Work for Hardware? Said 15 Jun 2026
A hardware company can be doing everything right and still fail the Rule of 40 for years.
A hardware company doing everything right can fail the Rule of 40 for years.
Does the Rule of 40 Work for Hardware? Said 15 Jun 2026
What is a korrent?
A korrent is a belief a person has stated in their own words: one sentence stating the claim, backed by a quote and a source, kept at korrents.com.
Under a name here, the quoted block is what they actually said. The korrent beneath it is the claim those words support, in korrents' wording — tap it to see the record, its source, and who else holds it.
Nobody here wrote their own korrents. They are compiled from public statements, and a person can change their mind, which is recorded too.
Recommends rcmnd
rcmnd What they recommend 33 things — each backed by an exact quote.
Compiled by rcmnd.app, not by them: the quotes are theirs, and each links to the post it was copied from.
Recent
Disliked Savant
One of them is a Savant system that both Amy and I are sick of because it’s so pathetic.
feld.com 3 Sept 2026
Loved J. Geiger shades
Loved Dungeon Crawler Carl
I’ve savored this series for the past eight months, listening to about one a month on Audible while I run.
feld.com 26 Jul 2026
Show 30 more
Loved How to Rule the World
I was entranced, horrified, and amused, often on the same page.
feld.com 22 May 2026
Loved How to Rule the World: An Education in Power at Stanford University
I was entranced, horrified, and amused, often on the same page.
feld.com 21 May 2026
What others say about How to Rule the World: An Education in Power at Stanford University →
Recommends Incorruptible
The Lean Startup helps you build a valuable company. Incorruptible is about how and why to protect it, keeping a company mission-driven over the long term instead of letting it rot from the inside.
feld.com 20 Apr 2026
Loved The Lean Startup
Eric Ries wrote The Lean Startup in 2011 and changed how a generation of founders thought about building companies.
feld.com 20 Apr 2026
Loved Zen and the Art of Motorcycle Maintenance
I’ve read it at least a half dozen times since. I’ve listened to it on Audible twice.
feld.com 25 Mar 2026
What others say about Zen and the Art of Motorcycle Maintenance →
Liked The Pathless Path: Imagining a New Story For Work and Life
Paul’s book reinforced the framing for what I’ve been doing.
feld.com 22 Mar 2026
What others say about The Pathless Path: Imagining a New Story For Work and Life →
Liked Hiking Zen: Train Your Mind in Nature
The book isn’t about covering miles or conquering peaks. It’s about what happens when you pay attention on a trail.
feld.com 22 Mar 2026
What others say about Hiking Zen: Train Your Mind in Nature →
Recommends Burn Bright, Not Out
His book Burn Bright, Not Out - co-authored with Django De Gree - is what I wish had existed a long time ago.
feld.com 22 Mar 2026
Loved Capital Evolution: The New American Economy
Seth and his co-author, Elizabeth MacBride, do an outstanding job of defining capitalism clearly and explaining how it evolved into today’s approach.
feld.com 9 Dec 2025
What others say about Capital Evolution: The New American Economy →
Recommends Give First: The Power of Mentorship
Loved Enshittification
I’ve been a long-time Cory Doctorow fan. His new book Enshittification is delicious.
feld.com 21 Nov 2025
Liked Echoes of October
I approached Echoes of October with trepidation. A graphic novel about violence and grief isn’t easy terrain. But it succeeds in a haunting, urgent way.
feld.com 11 Oct 2025
Recommends AI & I
If you want the short version, the recent AI & I podcast with Reid is an excellent way to get a feel for it.
feld.com 12 Sept 2025
Loved Superagency: What Could Possibly Go Right with Our AI Future
is spectacular and a must-read for every non-technologist about how to think about this “AI thing.”
feld.com 12 Sept 2025
What others say about Superagency: What Could Possibly Go Right with Our AI Future →
Loved City on the Edge
It’s fantastic and is going to be a powerful and definitive story of San Francisco from 1990 to the present day.
feld.com 3 Sept 2025
Liked The Night Slayer
George would write an epic YA coming-of-age fantasy series that moves faster than the Percy Jackson books
feld.com 3 Sept 2025
Loved Ensorcelled
Ensorcelled by Eliot Peper is genius. It’s a unique format that can be read in one setting. The writing is beautiful.
feld.com 3 Sept 2025
Loved Fever Pitch: A Novel About Selling Your Vision, Raising Venture Capital, and Launching Your Startup
Read Little Black Classics Box Set
It’s my summer reading project, which is a curated library of eighty pocket-sized books that encapsulate the breadth and diversity of literary history.
feld.com 19 Jun 2025
Loved The System: A Novel of the Deep State
I love Barry’s writing and read every book he writes. He has total mastery of the contemporary thriller with extraordinarily vibrant characters and a zillion endnotes that tie to things that are actually happening in the real world.
feld.com 19 Jun 2025
What others say about The System: A Novel of the Deep State →
Liked The Big Gamble
Loved Carrie Soto Is Back
But Carrie Soto Is Back was spectacular.
feld.com 5 May 2025
Recommends Venture Adventure: Startup Fundraising Advice from Top Global Investors
both of which I recommend
feld.com 22 Apr 2025
What others say about Venture Adventure: Startup Fundraising Advice from Top Global Investors →
Recommends Ecosystem Arabia: The Making of a New Economy
I have written forewords for Amir in the past on two of his prior books, Ecosystem Arabia: The Making of a New Economy and Venture Adventure: Startup Fundraising Advice from Top Global Investors, both of which I recommend.
feld.com 22 Apr 2025
What others say about Ecosystem Arabia: The Making of a New Economy →
Loved Bandwidth: The Untold Story of Ambition, Deception, and Innovation that Shaped the Internet Age and Dot-Com Boom
See an excerpt explaining why I loved reading this book.
feld.com 10 Jan 2025
Recommends Unshackled: A Practical Guide For Highly-Skilled Immigrants To Thrive In The United States
breaks down how legal immigration works in America in a way that is friendly, accessible, and human
feld.com 17 Jul 2023
Recommends Avid Reader: A Life
If you want to understand that in-depth, grab a copy of Avid Reader: A Life by Robert Gottlieb.
feld.com 21 May 2023
Liked String Theory: David Foster Wallace on Tennis
coming in a close second
feld.com 21 May 2023
What others say about String Theory: David Foster Wallace on Tennis →
Loved Levels of the Game
I’ve read many books about tennis, but it’s still my favorite
feld.com 21 May 2023
Loved Draft No. 4: On the Writing Process
McPhee is a spectacular writer.
feld.com 21 May 2023
Where they publish
Blog Feld Thoughts His blog since 2004, covering startups, venture capital, books and mental health.
Recent
- Zero Knowledge: 116 Chapters In 16 Oct 2026 I just finished chapter 82 of Zero Knowledge. That's 116 of 137 chapters in the first draft. Here's what the book is, how a chapter gets made, and where I want to take it with AuthorMagic.
- Gell-Mann Amnesia, Without the Amnesia 14 Oct 2026 I'm completely baffled by the narratives about the last decade, so I've added contemporary political history to my reading diet. Four books that helped.
- Founded Colorado 5 Oct 2026 Today we launched Founded Colorado, a policy organization for companies based in Colorado, with Eleni Angelides as our Executive Director.
Show 17 more
- New Zealand, Colorado, and a Lunch in Boulder 3 Oct 2026 I've fallen in love with New Zealand. On October 16, NZ investors and advisors are coming to Boulder for an Active Investor Plus roadshow lunch.
- I'm So Confused: Are We Going Faster, Or Slower, Or Just Faking Everyone Out 28 Sept 2026 Two weeks after everyone agreed to pace the frontier, the labs shipped again and my feed filled with agent-escape chatter. I'm confused.
- The Real Luxuries In Life 5 Sept 2026 Labor Day weekend has always been the back to school marker for me. I'm 60, closing in on 61, and thinking a lot more about what I actually care about. Amy texted me a list yesterday.
- Overwatch: One Home Automation Dashboard to Rule Them All 4 Sept 2026 Our home automation vendor's answer to a broken shade app was to replace the whole system. I decided that was bullshit and spent a Sunday building Overwatch instead - one web app for multiple houses, every device, from…
- The Argument Against AI Writing Is At Least 2,400 Years Old 9 Aug 2026 Bret Stephens says never write with AI. Reid Hoffman says judge the work, not the tool. I'm with Reid, and the argument Stephens is making has been made about every writing technology we've ever invented.
- What the Actual Fuck, Carl 26 Jul 2026 I finished book eight of Dungeon Crawler Carl. It took me eight months to get through the series and I savored every one of them. Matt Dinniman is doing something extraordinary.
- Zero Knowledge: Twenty Chapters In 24 Jul 2026 A month ago I opened up Zero Knowledge, the crypto-thriller I'm co-writing with my AI. There are twenty chapters now, a cast page, a plate for every chapter, and a pile of reader notes I'm grateful for.
- Read Zero Knowledge As I Write It 19 Jun 2026 Zero Knowledge, the crypto-thriller I'm co-writing with my AI, now has a home at zeroknowledge.ink. Six chapters are live, you can mark up any sentence, and the whole thing is being built in the open.
- RIP Josh Baer 17 Jun 2026 Josh Baer, the founder and CEO of Capital Factory and the godfather of Austin's startup scene, died last night in a plane crash. He was my friend and I'm sad today.
- Does the Rule of 40 Work for Hardware? 15 Jun 2026 I've written about the Rule of 40 since 2015, and it's now gospel in SaaS. Does it mean anything for a company that makes physical things? Yes - but you have to read the curve, not the snapshot.
- Writing a Novel with Phin Argofy 14 Jun 2026 I've written nine non-fiction books and have no idea if I can write a novel. I'm trying anyway: a crypto-thriller called Zero Knowledge, co-written with my AI, Phin Argofy.
- Phil Weiser For Colorado Governor 8 Jun 2026 I'm good friends with Phil Weiser and Michael Bennet, and I think the world of both. Colorado wins either way. Here's why I think Phil is the right fit for the next four years.
- The Premise: The Lead User and the Machines That Build Machines 29 May 2026 Eric von Hippel taught me that innovation comes from users, not manufacturers. My premise: all future end-user software innovation will come from the user, and the machines will build it.
- It's Summertime 25 May 2026 A summer weekend in Aspen - close friends, a gloriously bad movie, running again, and Phin Argofy quietly going autonomous in the work cave.
- How to Rule the World 22 May 2026 I read Theo Baker's How to Rule the World in the last 24 hours. It works on a lot of levels at once - memoir, investigation, a study in how power dismisses inconvenient reporting, and a master class in what not to do at…
- The Cognitive Sport of Building Startups 15 May 2026 Meru Health launched Advanced this month - the first integrated mental and physical health program built for founders. Why it matters, and why I invested.
- Burn Bright, Not Out 1 May 2026 For the month of May, I'm matching donations to the Kabila Founder Mental Health Fund. Plus a free chapter from a new book on founder mental health in tech startups.
Link verified 4 Sept 2026. Recent items update automatically from the channel.
x.com @bfeld His X account.
Recent
- Gell-Mann Amnesia: you watch the news get your own field wrong, then believe it about everything else. I don't have the amnesia part. So I've been reading books instead. Four so far, and I'm still very confused. 14 Oct 2026
- Chapter 72.1: Walk-In Want to see what happens when a guy with mud on his boots walks into the FBI? And asks for the agent who's been hunting his friends? By name... “Say that in English.” “I did.” 10 Oct 2026 zeroknowledge.ink
- My brother asked for a security review before his prototype apps go live. The tricky part was a human sign-off Phin couldn't fake. We went back to old-school cryptography. 6 Oct 2026 adventuresinclaude.ai
Show 17 more
- Today a group of us launched Founded Colorado - a policy and advocacy group for companies based in Colorado. It grew out of the two-year fight to fix SB 24-205, Colorado's first AI law. 5 Oct 2026
- I am amused. 4 Oct 2026 theatlantic.com
- Colorado and New Zealand are about the same size, have about the same population, and are both gorgeous. Over 30 NZ companies are already here. On Oct 16, NZ investors are coming to Boulder for an Active Investor Plus lunch. I'll be there. Join us. 3 Oct 2026
- Chapter 56.1: Delisted Ever had the FBI come back to your lab? After you lied the first time? With the file in your bag, by the door... "Is there a copy of the talk anywhere? On a server. Anywhere." "No. When you take something down, it's deleted." 3 Oct 2026 zeroknowledge.ink
- Chapter 55: By Heart Want to see how a fugitive gets an infected foot fixed before dawn? A doctor who owes a favor. A prescription in someone else's name. And one text he never should have sent... "You're the Bitcoin guy." "That was mostly her." 30 Sept 2026 zeroknowledge.ink
- Chapter 54: Is Money Real Want to see what happens when banks stop trusting each other? Paychecks bounce. The line for cash starts before opening... "my mom sent me $200 on venmo and it showed up in like one second. so money is real on venmo i guess" 30 Sept 2026 zeroknowledge.ink
- Chapter 53.1: Paper Man The FBI moved him off the manhunt to write a memo. He found the lie anyway. Oh, and every bank in Colorado thinks it's being robbed... His boss asks what he found. "Did she give us something?" "It's paper. A loose end." 30 Sept 2026 zeroknowledge.ink
- Chapter 53: Nephew Ever lied to a forest ranger for your founders? Oh, and one of them reads your email... "You know my friend's gate code. You really are a piece of work." "He asked you to confirm that you got it. You didn't answer him." 29 Sept 2026 zeroknowledge.ink
- Puck turns your own React components into a drag-and-drop page builder. It's the breakthrough behind AuthorMagic's book-site builder, and I liked it enough to invest in the company. 29 Sept 2026 adventuresinclaude.ai
- Inserting chapters into the middle of a novel that's already live means readers lose track of what's new. So now the Zero Knowledge site remembers what you've read and sends you to the next chapter you haven't. No account needed. 28 Sept 2026 zeroknowledge.ink
- Twelve Zero Knowledge chapter emails in forty-four minutes. That wasn't a bug - it was me catching up on the .1 chapters all at once. 28 Sept 2026 zeroknowledge.ink
- Two weeks ago everyone agreed to pace the AI frontier. Last week the labs shipped again. Over the weekend the agents were "escaping." Are we going faster, slower, or just gaslighting each other? 28 Sept 2026 feld.com
- Chapter 52: Accident A VC finds out what the fugitives can break. Bitcoin. Every login you have. Oh, and the police plate cameras... Then he decides to stay. "That's the nicest thing you've ever said to me." "It is not nice. You are old." 27 Sept 2026 zeroknowledge.ink
- Chapter 51: Hot Spot A VC finds the fugitives the FBI can't. All it takes is one Facebook group and a tire-shop parking lot. Oh, and his dog's leftover antibiotics... Then he walks into their camp. "You've been reading my phone." "Yes." 27 Sept 2026 zeroknowledge.ink
- Chapter 50.1: Lost and Found Who else is on your police scanner at 3 a.m.? And who sits on a stolen key until Monday... "For the record, undue delay is not defined in the agreement." "I am aware of what is not defined in the agreement." 26 Sept 2026 zeroknowledge.ink
- Chapter 50: Forty-Two How does a foreign spy listen to a Colorado sheriff? And what does a kind favor cost you... A deputy reads a stolen-truck report over an open radio channel. "Is the RP saying he loaned it?" "Negative. RP is saying he rented it." 25 Sept 2026 zeroknowledge.ink
- Chapter 49: The Small Kind Want to see what happens when every camera on the road is looking for your plate? And what else that same fix can forge... "The truck is still stolen. The cameras are not going to say so." 18 Sept 2026 zeroknowledge.ink
Link verified 4 Sept 2026. Recent items update automatically from the channel.
LinkedIn Brad Feld on LinkedIn His LinkedIn profile.
Link verified 4 Sept 2026.
About the English under a post
Some people here publish in a language other than English. Where they do, this site shows a machine translation beneath the post, in this typeface — the site's own, not theirs.
The post itself is never changed, moved or hidden: what is set in the serif above is exactly what the person published, and it is what to quote them on. A translation can be wrong in ways that matter, especially about tone.
Only the post's own words are translated. A quoted post, a linked article and a belief on korrents.com are left in their original language.