AI infrastructure and cybersecurity startups dominated venture funding this week, with SambaNova and Keyfactor each closing $1 billion（約1600億円） rounds as investors bet heavily on the hardware and software needed to deploy AI at enterprise scale. Beyond AI, venture firms also backed quantum computing, geothermal energy, and crypto infrastructure, reflecting a broader shift toward infrastructure and hard-tech funding across multiple sectors.
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Venture capital backed five AI startups among the week's top 10 funding rounds announced July 4–10. SambaNova (AI infrastructure) and Keyfactor (cybersecurity) each raised $1 billion（約1600億円）, with SambaNova valued at $11 billion（約1.8兆円） post-money. Investors also committed $300 million（約480億円） to quantum startup Oratomic, $134 million（約210億円） to geothermal company Quaise Energy, and $130 million（約210億円） to distributed AI platform Prime Intellect.
Why it matters
AI infrastructure and enterprise security remain the largest venture funding targets, signaling investor confidence that AI deployments require dedicated chips, training systems, and identity management at scale. Quantum computing and clean energy also drew substantial checks, showing diversification beyond pure software plays—meaning infrastructure and hardware startups now compete directly with consumer-facing AI for capital.
What to watch
SambaNova has now raised nearly $2.5 billion（約4000億円） total; Prime Intellect has raised $200.4 million（約320億円） total; Keyfactor has raised $1.21 billion（約1900億円） total. Oratomic's $300 million（約480億円） Series A included 16 investors, including Bezos Expeditions and computer scientist Scott Aaronson, underscoring confidence in neutral-atom quantum hardware as a near-term path to commercialization.
AI again dominated weekly venture funding, claiming five of the top 10 rounds. The two largest deals—SambaNova's $1 billion（約1600億円） Series F at an $11 billion（約1.8兆円） valuation and Keyfactor's $1 billion（約1600億円） private equity round—reflect investor conviction that AI deployment at scale requires both specialized compute hardware and enterprise security infrastructure. SambaNova's backers span traditional venture (Battery Ventures, Khosla), asset managers (BlackRock, Capital Group, T. Rowe Price), and strategic corporate investors (Intel Capital, Vista Equity Partners), indicating alignment across multiple investor classes around AI infrastructure as a durable category.
Beyond AI, venture capital diversified into quantum computing, clean energy, and aerospace. Oratomic's $300 million（約480億円） quantum round and Quaise Energy's $134 million（約210億円） geothermal funding suggest investors are hedging against single-sector concentration while backing founders in hard-tech areas where venture has historically played a smaller role. SBI Group appeared twice this week as a sole investor—backing both Gauntlet (crypto infrastructure, $125 million（約200億円）) and EDX Markets (institutional digital asset exchange, $76 million（約120億円）)—signaling sustained appetite for crypto infrastructure despite regulatory uncertainty.
The concentration of $1 billion（約1600億円） rounds in infrastructure and security, rather than consumer applications, also reflects a maturation dynamic: large-scale AI deployments now require dedicated tooling, management platforms, and compute resources, making enterprise infrastructure plays more defensible to investors than another consumer-facing AI application.
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