Backing the bold ideas that shape the future. Founder of @DFJvc, @drapervc, @Draper_U, @meetthedrapers. Pitch me: [email protected]

Menlo Park, CA
Joined February 2009
I like this: Important that we are one person one vote. xitter.cf/ca4voterid/status/2112… Of course we should all be voting by phone by now.
Prop 39 released a new ad today highlighting what politicians don’t want you to know: California is one of a handful of states that don’t require a photo ID to vote. Prop 39 is a battle of politicians versus people. Politicians want you to vote no. The People are voting yes. This ad is a parody, but the problem is not. The politicians want to protect their power and money. We want to give it back to you. Vote Yes on Prop 39. Donate: efundraisingconnections.com/…
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Huge announcement from @DraperVC portco Radiant. Proud to be a part of your journey. Radiant is now the only nuclear microreactor company with partnerships across the Army, Navy and Air Force.
The @USNavy has selected Radiant to deploy our Kaleidos microreactor at Naval Weapons Station Crane, Indiana. With this selection, Radiant is now the only nuclear microreactor company with partnerships across the Army, Navy and Air Force. The Navy has more than 70 years of safe reactor operations. It wrote the playbook on reactor safety. Earning its confidence is powerful independent validation of Kaleidos. This milestone moves us closer to our goal: reliable, resilient nuclear power wherever the mission demands. Through our work with all three branches, we’re building a clear path from military deployment to nuclear energy at scale for government and commercial customers. Read more details here: radiantnuclear.com/news/navy…
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Founders... Investors are watching to see what you do right after they write the check. Good founders get straight to work. They've got the rocket fuel, now they're launching. Bad founders come back asking what to do next. If you’re getting a check, it’s because an investor believes that you already know where you’re going. They’re giving you fuel, not GPS directions. Also... too much celebration is a red flag. Pop some champagne, sure or in my case sparking apple juice. But then get back to building.
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I voted for Steve Hilton. We need to break the one-party gunion monopoly in California. Try a republican this time. I voted yes for Prop 39. I think it will stop most corruption in our ballots, but we really should be voting with our phones by now. I voted no on Prop. 40. It will drive businesses and jobs out of state—also unconstitutional. I voted yes on 41 and 42. Because capitalism. I voted no on everything else. Most are just driven by special gunion interests.
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Fifteen years. That was the timeline my nuclear physicist friend gave me for a new nuclear plant in the US. Five to design, five for approval, five to build. Most entrepreneurs would have given up right there. @JakeDeWitte doubled down. That is what I invested in. Not the reactor, the founder who hears fifteen years and starts anyway. Now @Oklo is the first nuclear company approved in the US in 40 years, and the future keeps arriving faster than expected.
When Sci-Fi Becomes Reality: Oklo. What if nuclear power plants could be smaller, easier to deploy, and eventually turn used nuclear fuel into a new source of energy? That was the kind of idea @JacobDeWitte brought to @TimDraper. When Jake was building @Oklo, the timeline alone was enough to make most investors walk away. Tim recalls asking a nuclear physicist friend what it would take to build a new nuclear plant in the U.S. The answer: Five years to design. Five years for approval. Five more years to build. Tim invested anyway. Draper Associates committed $1 million early on. Tim has said the decision was made within an hour. They were betting not only on the technology, but on Jake’s ability to push through an industry defined by long development cycles, regulation, and enormous technical complexity. Draper Associates went on to back Oklo through every round leading up to its public listing. Today, Oklo is developing its Aurora fast-fission powerhouses: compact, metal-fueled, sodium-cooled reactors designed to deliver clean, reliable power. The current Aurora product line is designed to produce 15–75 MW of electricity, with the potential for larger systems in the future. But the reactor itself is only part of the idea. Oklo is also developing technology to recycle used nuclear fuel into new reactor fuel. Conventional reactors leave most of the fuel’s potential energy unused; Oklo says its recycling approach could recover up to 95% of the energy remaining in used fuel while reducing the amount of material requiring long-term disposal. And what once sounded like a distant nuclear vision is moving into the physical world. Oklo’s first Aurora powerhouse at Idaho National Laboratory is under construction. In June 2026, the U.S. Department of Energy approved its Preliminary Documented Safety Analysis, another major step toward operation. Oklo currently forecasts commercial operations at the Idaho project beginning in 2028. The ambition is getting much bigger, too. In 2026, Oklo and Meta announced an agreement supporting development of a nuclear-energy campus in Ohio that could eventually scale to 1.2 GW to support Meta’s regional data-center infrastructure. The best frontier companies don't necessarily make an impossible technology appear overnight. Sometimes they take an industry everyone assumes is too slow, too regulated, or too difficult to reinvent, and ask whether the underlying assumptions are still true. Why it matters for builders: A long timeline doesn't automatically make an idea unrealistic. The more important questions are: 🔎 Has the technology changed? 💰 Can the economics change? 🕚 And is the founder willing to stay with the problem long enough to make the future arrive? That was the bet on Oklo. And more than a decade after the company was founded, the experiment is still moving forward.
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Replying to @immusoft
@Immusoft just presented clinical data at ASGCT on ISP-001 (the world's first engineered B cell therapy ever tested in a human being). They take a patient's own B cells, reprogram them, and put them back in the body. Those cells become miniature factories that continuously produce the enzyme MPS I patients are missing. This means that there’s no more need for twice-weekly infusions and no more spike-and-crash enzyme levels. Your own cells are doing the work indefinitely. The disease they're targeting, Hurler Syndrome, kills most patients within 10 years of diagnosis. There is no cure and the current standard of care is either frequent infusions (forever) or a stem cell transplant that carries its own mortality risk. The clinical data showed: → Favorable safety and tolerability → Measurable biochemical activity → Patients were safely re-dosed They're now planning to expand into pediatric populations with CIRM backing the trial with up to $23M. The FDA has granted Orphan Drug, Rare Pediatric Disease, and Fast Track designations. The implications go way beyond MPS I with every disease that needs sustained protein delivery suddenly having a new option on the table. Exciting times in bio.
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Immusoft to Present Data Highlighting Positive Results from the World’s First Engineered B Cell in a Human Clinical Trial at ASGCT 2026: biospace.com/press-releases/…
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We backed @mogul__club early. After hearing Alex Blackwood’s update at our summit in May, I knew we had to lead the Series A. Alex Blackwood and Joey Gumataotao have a bold vision for real estate investing and the execution to back it up. A true “rhino” in the industry. Congratulations to Alex, Joey, and the entire Mogul team. Proud to keep backing you!
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In the last decade, we’ve had the honor of partnering with outstanding founders who build great value from nothing. It’s been a privilege to see you all build and grow, for example: → @iceye_global to enable all-weather, day-and-night imaging anywhere on the planet. → @XanaduAI to revolutionize computing through photonic quantum technology. → @Polymarket to harness the power of free markets to demystify real-world events. → @colossal to develop advanced gene editing technology for de-extinction → @arkham to create a central hub for blockchain research, risk management, and market transparency. → @ConsensusNLP to equip users to receive evidence-based answers from over 200 million peer-reviewed papers. → @aureliuslasers to protect citizens from Unmanned Aircraft Systems (UAS) drones at scale. → @FirehawkAero to advance hybrid rocket engines for the future of aerospace. → @rise_pay to enable businesses to easily hire, onboard, and pay global teams across 190+ countries → @VenusAerospace to revolutionize rocket engine propulsion. And truly hundreds of others! Entrepreneurs and founders are superheroes and we’re so lucky to be able to help them on the journey. We started this firm 40 years ago, and every decade gets even more exciting. It’s already been an adventure and we’re truly just getting started! 🚀
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Tim Draper retweeted
Talent is uniformly distributed in society. Opportunities are not. America's Startup is one way we're doing our part about it. A warm welcome to the new @America250 Investor Council members: @CathieDWood, @PratherARK, @christine_tsai, @skg_accel, @billreichert, @SungerBiggs, @BiedermanRob, @Robert_Katz and others. We're all inspired by @RosieRios's original vision: support our nation's youth and democratize entrepreneurship in America. I judged round one... those teams weren't waiting for permission to build. They were already building. Round two: over $1M in cash and prizes, up to $50K non-dilutive per team, finale in DC this December. Undergrad founders: applications close Thursday, Oct 8, 7:59pm EDT. Link in first reply. We're here to help founders fulfill their entrepreneurial dreams. Your part is to apply :)
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Tim Draper retweeted
Something startups often struggle with is biz dev, with a major blocker being hiring and training sales staff fast enough to get revenue in the door. Now imagine anyone starting had a playbook of what everyone on the team knows - and the ability to practice on “live” sales calls with buyer personas and get immediate feedback from a coach. Plus the ability for an AI avatar to answer customer questions when they’re browsing in different time zones. It's AI automation with the sales process… without replacing the humans that close deals. And now @Zoom backs it, too. Really couldn't be prouder of portco Avarra today!! ca.finance.yahoo.com/news/av…
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We backed @projectsolo early because they're solving the biggest problem of the AI era: knowing who's real. Great to see them shipping.
This AI agent joined 30+ Discord servers overnight and sent 500+ messages. Live counter next to its name: “Humans who noticed: 0” All it was told: get past every CAPTCHA and accept all the terms. It did. No custom exploit, just browsing and clicking. CAPTCHA still guards most servers until today. It checks whether something can solve a puzzle. BUT, solving puzzles is exactly what these AI agents are built for. Server owners are now stuck: friction at the door loses real members; an open door can’t tell members from agents. So over the weekend, we shipped the Solo Discord bot - one that doesn’t guard the join button. Members verify on their own phone and get a real “Human” role. You put that role on the channels that matter (chat, giveaways, support). Check is: one living person, counted once, AI agents can’t fake it. FHE encryption runs on the phone; no ID needed, no raw image stored. Shipping the bot today. Free for servers now. SDK if you want the same check in your own app. Try it now and tell us where it gets annoying. We’re reading every reply.
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When @BenLamm walked in saying he was going to bring back the woolly mammoth, he immediately had my attention. Now there are dire wolves on the ground and the dodo is on the list. Do not ask whether the pitch sounds crazy. Ask whether the founder can make it happen. Ben could.
When Sci-Fi Becomes Reality: Colossal. “We’re going to bring back the woolly mammoth.” That was the kind of pitch that got @TimDraper’s attention. When @BenLamm started @colossal, de-extinction still sounded much closer to science fiction than venture capital. But the ambition alone wasn’t what made the company compelling. Lamm had recruited renowned geneticist George Church as his co-founder and was building Colossal around advances in genetic engineering and de-extinction technology. The company’s goal goes far beyond recreating an extinct animal for spectacle. The underlying technologies have potential applications across conservation, genetics, fertility, and human health, and Colossal has already used its research to push into additional biological applications. One recent example: Colossal developed an artificial eggshell system capable of supporting a fertilized chicken embryo through hatching – a step toward solving one of the major technical challenges in bringing back certain lost species. Tim has described Colossal as a company with a strong North Star: a mission ambitious enough to pull talent, technology, and experimentation in the same direction. That’s what makes science-fiction companies interesting from an investment perspective. The real question isn’t: “Does this sound crazy?”. It’s: “What changed that makes this possible now?” AI, gene editing, synthetic biology, computational biology, stem-cell technology, and rapidly improving genomic tools are changing the boundaries of what founders can attempt. A company built at the intersection of those curves can look impossible, right up until it doesn’t. Why it matters for builders: ambitious isn’t the same as unrealistic. The strongest sci-fi companies usually aren’t based on magic. They’re based on real technological curves moving fast enough to make an old impossibility newly achievable. If your idea sounds crazy, the important question isn’t whether people laugh. It’s whether you can explain what changed, why now, and why you’re the team to make it real.
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A self-driving car I was testing once swerved into oncoming traffic. That was the moment I decided to invest. The full story is in my live conversation with the TBOY podcast in San Francisco, along with why I kept betting on SpaceX after three rockets blew up, the condition I put on Robinhood's founders before writing the first check, and my advice for building the next billion-dollar business. Thanks to @NickOfNewYork and @Jackkramer for having me on. Listen here: podcasts.apple.com/us/podcas…
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For 250 years, America's story has been driven by people who took a risk on their own ideas. That's what entrepreneurship is: freedom and trust in action. As a member of the Investor Council for America's Startup (@America250) I want to see that same spirit from the next generation. If you're an undergraduate student (or equivalent) at an accredited university, college, or trade school with an idea you're ready to build, this is your moment. Compete for a share of more than $1 million in cash and prizes, and get your idea in front of me and other leading names in tech and business. 1️⃣ Visit the America's Startup website at america250.org/americas-star… 2️⃣ Review the contest rules and confirm your eligibility 3️⃣ Grab your co-founder and submit your application by October 8
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Tim Draper retweeted
Kairos Health, a former @America250 America's Startup competitor, just got into @ycombinator's Fall 2026 cohort. They built an AI front desk for dental clinics and are now well on their way to scaling. Their story could be yours. If you're an undergrad with a big idea, apply by Oct 8 👇 america250.org/americas-star…
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"How did you KNOW Tesla would succeed?" I didn't. But I did the math. And the numbers said: If this works, it's going to work REALLY big. That's the calculation most VCs refuse to make. They want certainty. They want "safe bets." But the safe ones aren't as safe as you think. And the risky ones aren't as risky as you think. The difference is that the “risky” ones have 100x potential. The safe ones have 3x potential. When you actually do the math, the odds of success are about the same. So I'll take the weird founder with the crazy idea over the polished founder with the "proven model" any day. One of them might change the world. The other one is among other “start” copycats.
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Tim Draper retweeted
AI agents have created a new kind of business risk that almost nobody is covering yet: agents accumulate memory. Context, history, judgment built up over months of use. Lose that in an outage and you're not restarting an app but you're re-training a colleague almost from zero. So it's great to see our portfolio company @ArpioRPO getting ahead of it. They just launched automated disaster recovery for agentic AI workloads on @amazon Bedrock, and the key piece is state recovery: the agent comes back with its memory, not as a blank slate. Full recovery in about an hour, where the average ransomware recovery drags on for three weeks. The timing is right. @KPMG_US found that over half of large US companies are already running AI agents. Quietly, these systems have become critical infrastructure, and critical infrastructure deserves protection you can verify. Exactly what drew us to Arpio when we joined their $15M Series A at @DraperVC earlier this year: Doug Neumann and Shaw Terwilliger built recovery for the cloud era while everyone else was retrofitting the tape-backup era. Being first to protect AI agents is what that looks like in practice :) Announcement links in first reply.
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