SiFive secures $400 million at $3.65B valuation to scale RISC-V AI chips with Nvidia's backing

SiFive, a leading chip design company specializing in the open-source RISC-V architecture, has secured a $400 million Series G funding round that values it at $3.65 billion, with backing from Nvidia and other major investors.^[1][2][3] This milestone, reported by TechCrunch and corroborated across multiple outlets, underscores growing investor confidence in RISC-V as a viable alternative to dominant architectures like x86 and ARM for AI infrastructure.^[2]

The oversubscribed round was led by Atreides Management, with participation from heavyweights including Nvidia, Apollo Global Management, Point72 Turion, T. Rowe Price Investment Management, Prosperity7 Ventures, and Sutter Hill Ventures.^[2][3] Founded by the creators of the RISC-V instruction set, SiFive operates on an IP licensing model rather than manufacturing chips, and its designs are now integrated into over 500 products with more than 10 billion cores shipped worldwide.^[3] Nvidia's involvement is particularly noteworthy, as it signals the AI chip giant's strategic bet on open architectures to complement its GPU ecosystem, according to Tech Buzz and The AI World reports.^[1][2]

This funding boosts SiFive's valuation from $2.5 billion in 2022, positioning it as the most valuable RISC-V company globally amid exploding demand for AI data center processors.^[1][2] The capital will fuel development of next-generation scalable CPUs tailored for agentic AI workloads—advanced systems capable of autonomous decision-making—and seamless integration with Nvidia's infrastructure.^[2][3] As AI workloads surge, SiFive eyes a slice of a potential $100 billion market in next-gen data centers, challenging the proprietary hold of ARM and x86.^[1][3]

The deal arrives as governments and startups worldwide race to diversify chip supply chains. For context, Japan recently approved over $4 billion in subsidies for Rapidus Corp., a high-risk venture to produce cutting-edge AI chips domestically, as reported by Bloomberg.[Source 1] SiFive's surge highlights a broader industry shift toward open-source designs, reducing reliance on licensed tech from a few players and potentially lowering costs for hyperscalers building AI infrastructure.

Investors and analysts see this as validation for RISC-V's maturity, with SiFive preparing for an IPO to further scale its ambitions.^[2] Data center operators, AI developers, and chipmakers stand to benefit from more flexible, customizable processors, while the move could intensify competition in the $500 billion-plus semiconductor market. What happens next includes SiFive's rollout of new RISC-V-based AI chips, which could accelerate adoption if they match or exceed proprietary performance in efficiency and scalability.^[1][3]