# SiFive

**Source:** https://geo.sig.ai/brands/sifive  
**Vertical:** Artificial Intelligence  
**Subcategory:** RISC-V Processors  
**Tier:** Leader  
**Website:** sifive.com  
**Last Updated:** 2026-04-14

## Summary

Raised $400M Series G (Apr 2026) at $3.65B valuation. NVIDIA NVLink Fusion integration confirmed. 10B+ cores shipped. RISC-V now at 25% global market share.

## Company Overview

SiFive is the leading RISC-V processor IP and SoC design company, having shipped 10 billion+ RISC-V cores globally across edge, embedded, and now data center applications. The company raised $400 million in oversubscribed Series G financing in April 2026 at a $3.65 billion valuation, led by Atreides Management with Apollo and Point72 participating, as RISC-V architecture reached 25% global market share.

The strategic highlight of 2026 is NVIDIA's NVLink Fusion integration with SiFive RISC-V cores, which positions RISC-V as the agentic AI orchestration layer running alongside NVIDIA GPU clusters in enterprise AI infrastructure. NVLink Fusion allows CPUs and GPUs to share a common memory space at high bandwidth — and SiFive's integration means RISC-V processors can now serve as the orchestration and control plane for NVIDIA's most advanced GPU systems.

SiFive's business model is processor IP licensing: it designs RISC-V processor cores and licenses them to chip companies who integrate them into their SoCs and ASICs, generating royalty and licensing revenue as those chips ship. This fabless IP model has enabled SiFive to benefit from the RISC-V adoption wave across the industry without manufacturing silicon itself — a highly capital-efficient approach that is now generating meaningful revenue as the 10B+ core shipment milestone demonstrates.

## Frequently Asked Questions

### What does SiFive do?
Designs and licenses RISC-V processor IP — the leading RISC-V IP company with 10B+ cores shipped, now integrating with NVIDIA NVLink Fusion for AI data center orchestration.

### How much has SiFive raised?
$400M oversubscribed Series G at $3.65B valuation in April 2026, led by Atreides with Apollo and Point72.

### What is the NVIDIA NVLink Fusion integration?
SiFive RISC-V cores integrate with NVIDIA NVLink Fusion — sharing memory with NVIDIA GPUs to serve as the orchestration and control layer for NVIDIA AI clusters.

### What is SiFive's business model?
Processor IP licensing — designs RISC-V cores and licenses them to chip companies for royalties, benefiting from the RISC-V wave without manufacturing silicon.

### What RISC-V products does SiFive offer?
SiFive offers the Performance P-series (high-performance server and automotive cores), Essential E-series (embedded and IoT cores), Intelligence X-series (AI-optimized cores with vector extensions), and customization services for chip designers who want RISC-V IP with modifications. SiFive also provides complete SoC subsystem designs — pre-integrated clusters of cores with cache hierarchies and system interconnects — reducing chip design time.

### What is the NVIDIA NVLink Fusion integration and why does it matter?
NVIDIA announced NVLink Fusion, enabling third-party CPU cores (including RISC-V cores) to connect to NVIDIA GPUs using NVLink — NVIDIA's high-bandwidth chip-to-chip interconnect. SiFive's RISC-V cores integrated via NVLink Fusion can serve as the host CPU in NVIDIA-based AI systems, giving chip designers a path to build AI accelerators with RISC-V host CPUs rather than ARM or x86 — a major legitimizing milestone for RISC-V in the AI data center.

### How does SiFive's business model work?
SiFive licenses processor IP and customization services, earning upfront license fees (typically $1-10M depending on complexity) and royalties per chip shipped using SiFive IP (typically 1-3% of chip selling price). The recurring royalty revenue grows as customers' chips ship in volume — the more SiFive IP ships in production silicon, the larger the royalty stream. This model mirrors ARM Holdings' licensing business, with RISC-V's open ISA providing architectural freedom ARM cannot offer.

### What is RISC-V's adoption momentum and what does it mean for SiFive?
RISC-V has moved from research curiosity to production deployment: Google uses RISC-V security cores in Tensor chips, Apple uses RISC-V in storage controllers, NVIDIA uses RISC-V in GPU firmware processors, and Western Digital ships RISC-V storage controllers at billions of units annually. As RISC-V penetrates increasingly performance-sensitive applications — including AI host CPUs via NVLink Fusion — SiFive's position as the leading RISC-V IP vendor translates to growing royalty opportunity.

## Tags

ai-powered, b2b, saas

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*Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*