SiFive raises $400M in Series G

SiFive, a leader in RISC-V open architecture chip design, has secured $400 million in a Series G funding round, raising its valuation to $3.65 billion. This fundraising was led by Atreides Management and saw participation from notable investors including NVIDIA, Apollo Global Management, Point72 Turion, and T. Rowe Price Investment Management. The round was notably oversubscribed, highlighting significant investor interest.

SiFive was founded in 2015 by engineers from UC Berkeley, who were integral in designing the RISC-V instruction set architecture. The company operates by licensing its processor design blueprints, allowing customers to customize them as per their requirements, unlike traditional proprietary architectures like Intel's x86 and Arm. To date, SiFive's intellectual property has been integrated into over 500 chip design projects, with more than 10 billion cores shipped. NVIDIA’s recent decision to port its CUDA software to the SiFive/RISC-V platform marks a crucial step in broadening the software ecosystem's capabilities for data center deployment.

The strategic rationale for this funding round is multifaceted. SiFive plans to integrate NVIDIA’s NVLink Fusion interconnection technology into its high-performance data center platform by January 2026, enabling RISC-V based CPUs to interface directly with NVIDIA GPUs. This collaboration potentially shifts the computing architecture landscape, which has been dominated by Intel x86 and Arm, signaling a possible shift towards more open architectures in AI and data center workloads.

This development comes against a backdrop of significant industry shifts. The semiconductor sector is witnessing intensified competition, particularly with Arm's planned 2026 release of its first AI chips, directly challenging the hardware space traditionally filled by firms utilizing Arm’s IP. Analysts suggest that the growing demands of AI workloads could encourage cloud providers to explore alternative architectures that offer greater customization and supply chain autonomy, presenting an opportunity for SiFive's RISC-V solutions.

Looking ahead, SiFive faces a market where its success will depend on the broader industry's willingness to adopt open architectures over established ones. As cloud giants weigh the benefits of greater customizability against established software ecosystems, regulatory and competitive pressures will play a significant role in shaping SiFive's path forward. The closing of this funding round marks a pivotal moment for SiFive as it seeks to carve out a more substantial role in the evolving data center and AI computation landscape.