National Security & Technology Leader | General Partner and Head of Global Affairs, @a16z | Lecturer @Stanford | Board Member @CNASdc | Fellow @RUSI_org

Joined August 2013
Small cities, school districts and rural hospitals guard our most sensitive data with the fewest resources to defend it. Today we’re launching Securing America’s Infrastructure Foundation, a new nonprofit, bringing AI-powered cyber defense to them at no cost. SAIF starts with focused goals for on the ground impact and $25M in committed funding by a16z's founders. I’m joined by a founding board of Brian Barrios, @GoldsmithOnGov, Bob Lord, @vishalmisra and @philvenables. If you lead a small city, rural school district or hospital system or want to join our team, please reach out: [email protected] Read our full announcement here: a16z.news/p/introducing-secu…
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a16z’s Japan office is open! Thank you to Governor Koike-san for the thoughtful remarks earlier today. Japan is a world leader in technology and shows increasing innovation in sectors like AI, cybersecurity, robotics, and defense. Under a16z’s new Japan lead, Hitoshi Yoshida’s, we’re excited to do more work in Japan as we spend more time in markets that want to build together.
a16z is officially in Japan, led by Hitoshi Yoshida as Head of Japan, with the opening of our Japan office. It was an honor welcoming Governor Koike at the opening earlier today. Japan combines world-class industrial capabilities with growing innovation in AI, cybersecurity, robotics, and defense. By bringing our portfolio companies and the Japanese ecosystem together, we aim to accelerate Japan’s AI-native economy and strengthen the ties between Silicon Valley and Japan. As the former President of Microsoft Japan and Hewlett-Packard Japan, Hitoshi brings decades of technology leadership and deep relationships across business, industry, and government. We’re thrilled to have him lead our efforts in Japan and look forward to doing great work in partnership with the Japanese technology community. 日本代表として吉田仁志を迎え、日本オフィスを開設できたことを大変心強く光栄に思います。日本は、世界有数の産業基盤と、AI・サイバーセキュリティ・ロボティクス・防衛などの分野における目覚ましいイノベーションを兼ね備えています。 我々はこれまでになかった機会を、日本の若い世代に提供していくことを目指します。日本のテクノロジーコミュニティの皆様と共に、日本の市場やエコシステムの発展に貢献していけることを楽しみにしています。
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Exactly !
This is reductive and does not assume best intent. I think what you are hearing in the discourse is the hope that: 1) Individuals with defensive cybersecurity and DFIR expertise will be included in post-mortems, alongside the young, very intelligent but also very AI-pilled individuals who happen to publicly espouse a narrow band of beliefs on AI harms. My suggestion, which I have made privately to your colleagues, would be to form tiger teams drawn from both DFIR firms and security teams at other AI companies to help investigate these incidents and publish the results under the auspices of the FMF. 2) We will start to hear from the well-respected security professionals at the Big-L Labs and not just the AI researchers, who live in a bit of a personal and professional bubble and have a tendency to dramatically quit instead of working the problem. 3) The big-L Labs will publish self-regulatory rules and follow them. The best way to regulate is just to do it. I would start with draft Level 1, 2 and 3 security architectures for RL/eval environments. This would create targets for NeoClouds and other providers. (1: normal runs, proxied internet access and monitoring. 3: cyber-tuned models, air gapped). Happy to contribute.
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You can’t stop a rogue system just by asking it nicely. Cybersecurity learned this decades ago: true safety requires hardware-level enforcement, not just software rules. Excited to see @JensenHuang and @nvidia launch the Open Agent Safety Platform. In encryption, we rely on hardware "roots of trust"—a physical foundation that verifies who you are and guarantees actions down the line are legitimate. AI agents need that same hardware-backed chain of custody. Prompts influence what an AI wants to do, but silicon dictates what it can do. It’s time for frontier AI labs to embed these agentic safety controls directly into their deployment pipelines.
Today, with over 100 industry partners, we introduced the NVIDIA Open Agent Safety Platform, bringing together OpenShell and Sentry. Artificial intelligence is extraordinary technology that will advance discovery, productivity, security, health, and prosperity for generations to come. But its full promise can only be realized when people have confidence that AI is being built to be safe and deployed with wisdom and responsibility. This is bigger than a single product. It's the beginning of an open ecosystem to build the trust layer for safe agent systems. Together, we are building the foundation of the AI economy. Trust and innovation are not in conflict. Safety is how trust is earned. We must build not only the most capable AI, but the most trusted AI, so that this extraordinary technology can realize its enormous promise for the world. nvda.ws/4hcoq7m
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Ahead of the Trump-Xi summit, I joined @NPR’s @npratc on the U.S. - China tech race. The common ground is thin, but real. While Xi rejects American technology restrictions, he also acknowledges shared concerns, including misuse of models to accelerate development of bio or chemical weapons or accidental escalation. That narrow space is where summit discussions can actually build future joint efforts. npr.org/2026/09/20/nx-s1-597…
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Taiwan is a critical technology partner - one committed to building with U.S. beyond chips, from AI to recycling critical minerals, from electronics and chip production. Productive meetings with @bikhim, Defense Minister Koo, @josephwutw, and leaders across industry and R&D. I was also honored to deliver the closing keynote at the second annual Whole of Society Resilience Conference.
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Our current approach to cyber defense isn't keeping pace with how adversaries use AI to attack critical systems. In my latest @ForeignAffairs article, "The New Chinese Way of Cyberwar: How Beijing Will Weaponize Digital Chokepoints", I outline a new approach. Read it below - eager for your thoughts. foreignaffairs.com/china/new…
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Defense tech is changing the pace and scale of innovation for America's military and militaries around the world. Not every ally brings the same thing to the table — some are diplomatic partners, some have got real game. Being strategic about how we leverage tech and allies matters more than ever in a world that's geopolitically unstable. I unpacked this with @NGirishankar for @CSISEST's Betting on America.
🔴 Live now on Betting on America: Technology Is Security @AnneNeuberger, General Partner and Head of Global Affairs at @a16z and former Deputy National Security Advisor for Cyber and Emerging Technology, joins Betting on America with @NGirishankar to make the case that technology leadership is security. She argues that sustaining leadership has become increasingly challenging as acceleration technologies like AI, robotics, quantum, and cyber converge, creating significant upsides for innovation but also downside risks. These technology disruptions will require policymakers, investors, and our alliances to adapt rapidly. Watch here: csis.org/events/technology-s…
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Today, I’m excited to join Andreessen Horowitz as a General Partner and Head of Global Affairs. This is my next chapter in the mission of securing America at home and ensuring technological innovations are adopted to keep us safe, working together with our allies to build a more secure and prosperous future. Today, as the U.S. and China compete on the global stage, the spread of technology is tinged with geopolitics and more fragmented. Security now requires a focus on digital sovereignty, supply chain resiliency, and the trustworthiness of the infrastructure underpinning our economies and our national security. My full announcement: a16z.news/p/technology-is-se…
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Disclosures regarding this article/content: Not an offer or solicitation. None of the above should be taken as investment advice or an advertisement for investment services. Please see a16z.com/disclosures/ for more information.
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Cybersecurity is becoming a contest between AI systems used by attackers and their targets. The decisive factor is which side has richer data and better models and can act at machine speed, writes @AnneNeuberger on.wsj.com/4kKzI2T
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In an AI era when attackers can jiggle every virtual doorknob continuously, human defenders don’t stand a chance. What matters is how fast we deploy digital defenders to jiggle those doorknobs—and tighten them—beforehand. We need a network of secure defensive agents that can reason and react faster than any human. Read my full piece in @WSJ: wsj.com/opinion/ai-can-help-…
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The robotics race is going to determine the future of our national security. If we don’t act soon, it’s China’s race to lose. Here’s how China is winning, and how we can catch up: Thread 🧵
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We’ve seen this playbook before – like in solar PVs. First Chinese firms enter the market. They rapidly learn how to manufacture more cheaply than competitors. They undercut rivals, then either buy them or drive them out of business. The end state: total Chinese supply chain dominance. It’s already the case that American companies that want to build robots are reliant on Chinese parts. But in a few years, Chinese suppliers might be totally dominant in the global market.
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If we don’t act, China’s lead is going to be too big to overcome. Given how important robotics is going to be, we need to get serious. Read me and @martin_casado in the Wall Street Journal on the robotics race: wsj.com/opinion/china-is-win…
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