Seth Bannon

Seth Bannon

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Entrepreneur, investor. Founder of @fiftyyears. Make something civilization needs. Also: https://t.co/xhMPeOCKIN

All Our Allies Now Aligned with Our Greatest Foe
SocialMar 19, 2026

All Our Allies Now Aligned with Our Greatest Foe

They've managed to push all of our major allies into the arms of our biggest adversary. Remarkable. https://t.co/MtFDnFiwkm

By Seth Bannon
San Francisco: Unmatched Era for Builders Today
SocialMar 18, 2026

San Francisco: Unmatched Era for Builders Today

In all of human history, there’s never been a better place or time to be a builder than San Francisco right now.

By Seth Bannon
From 5050 Support to $400K Daily Revenue
SocialMar 16, 2026

From 5050 Support to $400K Daily Revenue

A portfolio founder we initially supported through 5050 pre-company just shared revenue has grown to $400,000. A day. Nothing more satisfying than seeing a sparkle in a founder's eye grow into a real company creating impact at scale.

By Seth Bannon
Prototype Fluidics System Thrives Overnight at 50Y HQ
SocialMar 16, 2026

Prototype Fluidics System Thrives Overnight at 50Y HQ

Came in to find this prototype @cephlainc fluidics system running on the kitchen table at @fiftyyears. Part of an overnight reliability test. The energy at 50Y HQ is unbeatable. https://t.co/eOyN8nBXd9

By Seth Bannon
Immigrants Powered Moon Landing and Modern Chip Revolution
SocialMar 15, 2026

Immigrants Powered Moon Landing and Modern Chip Revolution

"We were doing just fine without immigrants" is a commonly repeated trope. Just to to take the examples listed and the immigrants who made essential contributions... Landing on the moon: Wernher von Braun (Germany) → Chief architect of the Saturn V rocket, the...

By Seth Bannon
More Powerful AI Increases My Drive to Work
SocialMar 14, 2026

More Powerful AI Increases My Drive to Work

Counterintuitive: The better AI gets at doing work, the more work I want to do. Because the leverage of each minute of effort keeps rising.

By Seth Bannon
Hardcore Team Grinding Late Night on Progress and 5050
SocialMar 14, 2026

Hardcore Team Grinding Late Night on Progress and 5050

Friday night 8pm. @moxon is editing Progress. @Aleborda21 & @aniascigalska are perfecting 5050. Our team is hardcore. https://t.co/4TPG20n56L

By Seth Bannon
Defending Innovation: Supporting Anthropic in Court
SocialMar 12, 2026

Defending Innovation: Supporting Anthropic in Court

.@fiftyyears is going to court. We've joined this amicus brief in support of Anthropic. American innovation depends on companies being governed by the laws Congress passes and the Constitution. Proud to stand up for this principle with @JoinFAI and others.

By Seth Bannon
Cuts to Civilian‑protection Team Lead to Tragic School Bombing
SocialMar 11, 2026

Cuts to Civilian‑protection Team Lead to Tragic School Bombing

They gutted the team that operationally helps the US military avoid civilian casualties during war. Then we killed over 150 schoolgirls by accidentally bombing their school. This administration is torching American soft power.

By Seth Bannon
Israel's Lebanon Bombings Displace 13.5% of Population
SocialMar 11, 2026

Israel's Lebanon Bombings Displace 13.5% of Population

Israel's bombing of Lebanon has displaced 800,000 people. 13.5% of the population. That would be like 47 million people being displaced in the US. The population of Maryland, Colorado, Minnesota, South Carolina, Louisiana, Kentucky, Oregon, Oklahoma, Connecticut, Utah combined.

By Seth Bannon
Deep Tech Expertise Was Wise Before It Became a Meme
SocialMar 11, 2026

Deep Tech Expertise Was Wise Before It Became a Meme

Backing deep tech was smart 5 years ago when it wasn't the meme, you say? It's important to have deep tech expertise, you say? Key is to have built an edge in deep tech, you say?

By Seth Bannon
Fast Loans and Direct Payroll Integration Ensure Employee Pay
SocialMar 11, 2026

Fast Loans and Direct Payroll Integration Ensure Employee Pay

At @fiftyyears we gave fast loans and even connected our personal bank accounts to portfolio companies' payroll systems to ensure they could pay their employees.

By Seth Bannon
Hire for Purpose, Not Just Hype, to Retain Talent
SocialMar 9, 2026

Hire for Purpose, Not Just Hype, to Retain Talent

Empty calories. All Cluely stood for was being hyped and hot. When things got tough, the team jumped ship because they recruited people only interested in being part of a hyped and hot startup. When it was no longer was, they...

By Seth Bannon
Data‑Creators, Not Just Coders, Will Own AI Future
SocialMar 8, 2026

Data‑Creators, Not Just Coders, Will Own AI Future

Companies with technology to to uniquely generate the data needed to train and fine tune models can create enduring value in the age of AI. The best AI companies may be those building in atoms and not just bits. Create...

By Seth Bannon
Seed VCs Act Like Traders, Not True Company Builders
SocialMar 2, 2026

Seed VCs Act Like Traders, Not True Company Builders

Most seed VCs these days act more like traders than investors or company builders. It's not good for anyone, least of all founders.

By Seth Bannon
Success Attracts Talent; Failure Repels Potential Partners
SocialFeb 26, 2026

Success Attracts Talent; Failure Repels Potential Partners

In this case, the founders achieved something pretty remarkable. So imagine what he would do if the founders actually failed. Who would want to work with someone like that? https://t.co/mCAucKKUoo

By Seth Bannon
Guard Your Cap Table: Success Attracts Detractors
SocialFeb 25, 2026

Guard Your Cap Table: Success Attracts Detractors

Founders, know that even if you build a world class product and achieve an outcome most can only dream of, there will still be people that try to tear you down. Be very careful with who you allow onto your...

By Seth Bannon
California's Wealth Tax Threatens Innovation, Yet I Stay
SocialFeb 21, 2026

California's Wealth Tax Threatens Innovation, Yet I Stay

The California wealth tax as currently written would be really bad for the state and its innovation economy. That said, even if it passes I'm not going anywhere. California has helped me create more wealth than I could imagine growing up on...

By Seth Bannon
Prioritize Importance and Neglect, Expect Controversy
SocialFeb 17, 2026

Prioritize Importance and Neglect, Expect Controversy

The only two things @alexblania asks when choosing what to work on: What will be most important? What is neglected? @MollySOShea will correct you on one thing. He doesn't like controversial things. It just so happens that important + neglected often = controversial. Proud...

By Seth Bannon
Engineers: Build Real-World Companies Now with 5050
SocialFeb 11, 2026

Engineers: Build Real-World Companies Now with 5050

Enough AI slop. Enough gambling apps. There’s never been a better time for engineers to build companies that reshape the physical world. Start one with 5050. Apply now. Early bird deadline Feb 15. https://t.co/giXwZLE8uX

By Seth Bannon
Early Investors McCauley and GarageCapital Celebrate Groq Success
SocialDec 25, 2025

Early Investors McCauley and GarageCapital Celebrate Groq Success

One of the unsung winners from the $20B Groq deal: @mmccauley and @GarageCapital. They invested in the first round and several since. Incredibly kind, incredibly humble, incredible investors. Always great to see the good guys win.

By Seth Bannon
VC Firm Publishes Complete Data on All Portfolio Startups
SocialDec 21, 2025

VC Firm Publishes Complete Data on All Portfolio Startups

We're the most transparent in VC in history. So we're sharing full information on all the startups we've backed. Investment size, valuations, current revenues, everything. Including for startups still in stealth. https://t.co/fD3p3Tdaux

By Seth Bannon
Portfolio Company Posts $334M ARR, 117% Growth
SocialDec 9, 2025

Portfolio Company Posts $334M ARR, 117% Growth

Nothing beats a one on one catch up but damn it's cool to hear a portfolio founder update via a live earnings call. $334M annual run rate. 117% YoY Q3 revenue growth. 70% gross margins. GAAP profitable company-wide. What a company. https://t.co/2SlwkNCLz0

By Seth Bannon
Solugen Slashes Six-Year Process to One Month
SocialDec 9, 2025

Solugen Slashes Six-Year Process to One Month

Took a process that typically takes 6 years down to 1 month. Solugen is bringing software timelines to the chemicals industry.

By Seth Bannon
Mission‑First Investing: We Match Founders’ Pace
SocialDec 5, 2025

Mission‑First Investing: We Match Founders’ Pace

At @fiftyyears, nothing matters more than the mission. So we don't operate like most investors. Not many OOO auto replies over the holidays. No weeks long trips to Aspen. No long summer vacations. We try to match the pace of our founders....

By Seth Bannon
Software Will Be Free; Value Moves to Scarce Hardware
SocialDec 2, 2025

Software Will Be Free; Value Moves to Scarce Hardware

One-to-many software companies might not exist in 3 to 5 years. Software production is en route to becoming abundant and free. When one component of production becomes abundant and cheap, value accrues to what remains scarce scarce and difficult (e.g. those...

By Seth Bannon
Purpose‑Driven Founders Outperform Fame‑Seeking Entrepreneurs
SocialNov 21, 2025

Purpose‑Driven Founders Outperform Fame‑Seeking Entrepreneurs

This is my single biggest disagreement with YC. Starting a startup to get famous, or to do better than those around you, or for vanity, or yes even just to get rich, is worse for society and worse for founders. It's...

By Seth Bannon
AI Generates Ready-to-Use Antibodies in Weeks
SocialNov 20, 2025

AI Generates Ready-to-Use Antibodies in Weeks

Push button, get antibody therapeutics. The future of AI x Bio is here, folks. Nabla Bio unveiled JAM-2, a model capable of generating de novo, developable, antibodies against extremely hard, novel targets. With no lead optimization! These are zero shot therapeutics...

By Seth Bannon
VC Values Revealed by the Startups They Fund
SocialNov 13, 2025

VC Values Revealed by the Startups They Fund

If you want to know the values of a VC firm, look at the companies they choose to back.

By Seth Bannon
A16z Talent Wanted: Join FiftyYears to Support Purposeful Founders
SocialNov 11, 2025

A16z Talent Wanted: Join FiftyYears to Support Purposeful Founders

If you're at a16z and want to back honest and courageous founders who care for the common good and ask themselves how they're making the world a better place, @fiftyyears is hiring. DMs open.

By Seth Bannon
Two Portfolio Wins: Nasdaq IPO and Time Cover
SocialNov 8, 2025

Two Portfolio Wins: Nasdaq IPO and Time Cover

One @fiftyyears portfolio company IPOed on NASDAQ the same day another appeared on the cover of Time. Pinch me.

By Seth Bannon
Mission‑First Biotech Thrives on Science and Execution
SocialNov 6, 2025

Mission‑First Biotech Thrives on Science and Execution

10 out of 10. Would recommend. BillionToOne is a wonderful example of what's possible when you take on the most important, hardest problem you can. Oguzhan and David didn’t set out to “start a startup.” They wanted to solve a globally important...

By Seth Bannon
Few Dared, Now AI‑bio Partnerships Finally Thrive
SocialNov 4, 2025

Few Dared, Now AI‑bio Partnerships Finally Thrive

Many biologists called hubris on entrepreneurs looking to reinvent bio with AI. Many in AI deemed bio too messy, refusing to touch wet labs. A small few saw the potential and built. Grateful to be partners to many now hitting their stride.

By Seth Bannon
ManifoldBio Lands $55M AI‑bio Deal with Roche
SocialNov 3, 2025

ManifoldBio Lands $55M AI‑bio Deal with Roche

What AI x bio winter? @ManifoldBio inked the largest AI bio platform deal in ~4 years. $55M upfront, potential for $2B in milestones and royalties. With Roche. Using their massively scaled in vivo tech to find shuttles to bring therapeutics across the...

By Seth Bannon
Future AI Breakthroughs Will Rely on Adaptive Learning, Not Size
SocialOct 22, 2025

Future AI Breakthroughs Will Rely on Adaptive Learning, Not Size

If Adaption Labs is right, the next leap forward in AI won’t come from trillion parameter models, it’ll come from systems that learn on the fly. https://t.co/t4EXiWHf8Z

By Seth Bannon
From Bench Space to S‑1
SocialOct 8, 2025

From Bench Space to S‑1

Surreal to see an S-1 from a company we backed when it was just the founders sharing bench space. https://t.co/YkVATB5C0b

By Seth Bannon