SiFive
A fabless semiconductor company supplying commercial RISC-V processor IP, system-on-chip technology, chips, and development platforms.
Last updated August 21, 2026
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Overview
SiFive is a United States-based fabless semiconductor company focused on commercializing processors and chip technology built around the open RISC-V instruction set architecture. Founded in 2015 by University of California, Berkeley researchers Krste Asanović, Yunsup Lee, and Andrew Waterman, the company emerged from the group that developed RISC-V and became one of the earliest commercial suppliers of RISC-V processor implementations. Its business is primarily based on licensing processor cores and related intellectual property, supplemented by chip-design services, system-on-chip IP, development boards, software support, and selected silicon products. The company’s early importance came from turning RISC-V from an academic architecture into a usable commercial platform. In November 2016, SiFive introduced the Freedom Everywhere 310 system-on-chip and the original HiFive development board. The FE310 was described as the first commercially produced chip implementing RISC-V, while the HiFive board gave developers a practical way to experiment with the architecture. In 2017, SiFive released the U54-MC, a 64-bit quad-core design intended to support full operating systems such as Linux. The company subsequently expanded its portfolio from small embedded controllers into application processors, high-performance cores, vector and machine-learning processors, safety-oriented automotive designs, and customizable SoC platforms. SiFive operates in a market where customers license processor architectures and integrate them into their own chips rather than buying only finished processors. This model allows semiconductor companies, systems firms, and specialized chip designers to tailor implementations for power consumption, performance, area, security, connectivity, and application requirements. The company’s principal competitive distinction is its use of the open RISC-V ISA, which can give customers an alternative to proprietary processor ecosystems such as Arm. SiFive supplies the core designs and surrounding IP, while customers generally manufacture or arrange manufacture of the resulting chips through foundry partners. Its product families have included the Essential range for embedded and area-efficient applications, the Performance range for application processors and Linux-capable systems, the Intelligence range for vector and machine-learning workloads, and Automotive offerings designed for vehicle electronics and safety-sensitive applications. The company has also supplied memory-interface, connectivity, peripheral, and security IP. Its OpenFive unit extended the business into processor-agnostic custom SoC design, although that unit was sold to Alphawave IP Group in 2022. SiFive has formed technology relationships across the semiconductor ecosystem. Announced users, licensees, or collaborators have included Samsung, Intel Foundry Services, Tenstorrent, Renesas Electronics, Canonical, Codeplay Software, the Barcelona Supercomputing Center, and NASA-related computing initiatives. Its development boards, including HiFive Unleashed and HiFive Unmatched, helped demonstrate that RISC-V could support more capable software environments beyond microcontroller applications. The company has financed its expansion through private investment rounds and has experienced rapid growth as interest in RISC-V increased. It appointed Naveed Sherwani as chief executive in 2017 and Patrick Little as chief executive in 2020. In 2023, SiFive reported a substantial workforce reduction while stating that it remained committed to its product lines and was adequately funded. SiFive remains a private provider of RISC-V processor IP and custom silicon technology, with its long-term position tied to the growth of RISC-V in embedded computing, automotive electronics, data processing, artificial intelligence, and other specialized semiconductor markets.
History
SiFive was established in 2015 by Krste Asanović, Yunsup Lee, and Andrew Waterman, researchers associated with the development of the RISC-V instruction set architecture at the University of California, Berkeley. The founders created the company to make RISC-V available as a commercial processor platform. Unlike conventional chip companies that sell processors manufactured under their own brands, SiFive concentrated on licensable processor designs and related IP that customers could integrate into custom silicon. The company’s first major product milestone came on November 29, 2016, when it released the Freedom Everywhere 310 SoC and the HiFive development board. The FE310 became an early commercial implementation of RISC-V and helped establish SiFive as one of the first companies to turn the architecture into a shipping product. In 2017, the company appointed Naveed Sherwani as CEO and introduced the U54-MC, a 64-bit quad-core processor design intended to support operating systems such as Linux. SiFive followed with the HiFive Unleashed board in 2018, bringing a four-core 64-bit RISC-V SoC to developers. SiFive broadened its capabilities through the 2018 acquisition of Open-Silicon, an ASIC design company. This gave SiFive additional expertise in taking customer requirements through custom chip implementation. The company also raised successive private funding rounds and attracted strategic investment from semiconductor and technology investors. In 2019, it introduced the Shield security architecture and announced Apex cores for mission-critical applications as well as Intelligence cores aimed at vector and machine-learning workloads. Samsung separately announced plans to use SiFive RISC-V cores in systems-on-chip, automotive, and 5G-related applications. In 2020, Patrick Little became SiFive’s CEO, and former LLVM and Clang lead developer Chris Lattner joined the company as senior vice president of platform engineering. SiFive launched the OpenFive business unit to offer custom, processor-agnostic SoC design services. It also released the HiFive Unmatched, a Mini-ITX development board designed to demonstrate a more capable RISC-V software and hardware environment. During this period, Tenstorrent licensed SiFive Intelligence X280 cores for artificial-intelligence chips, while Renesas announced cooperation with SiFive on automotive chip design. SiFive’s technology gained further visibility in 2021. The company announced the P270 Linux-capable processor and the P550, described as its highest-performing RISC-V CPU at the time. Intel Foundry Services selected the P550 for its Horse Creek platform, a development system intended to demonstrate RISC-V processor implementation on Intel manufacturing technology. Reports of possible acquisition discussions involving Intel emerged around the same period, but the proposed transaction did not proceed. SiFive also announced a 5-nanometer system-on-chip tape-out using TSMC technology, an important demonstration of RISC-V at an advanced process node. The company continued to cultivate the broader RISC-V ecosystem. Canonical announced Ubuntu support for HiFive Unleashed and HiFive Unmatched, while SiFive worked with Codeplay Software and the Barcelona Supercomputing Center on LLVM support for RISC-V vector extensions. SiFive’s DesignShare initiative sought to reduce barriers to custom-chip prototyping by connecting customers with IP and design partners under a model in which licensing payments could be deferred until mass production. In 2022, SiFive completed a private Series F financing round and sold its OpenFive business unit to Alphawave IP Group. The transaction included a license of SiFive RISC-V processor IP and narrowed SiFive’s direct focus toward processor cores and related semiconductor IP. SiFive was also the principal sponsor of Cambridge United Football Club during the 2022–23 and 2023–24 seasons, giving the company a visible marketing presence outside the semiconductor industry. In 2023, SiFive reportedly eliminated approximately one-fifth of its workforce. The company said it remained committed to its existing products and product families. SiFive continues to operate as a private fabless semiconductor IP company, serving embedded, automotive, artificial-intelligence, high-performance computing, and other specialized markets where customers seek customizable RISC-V-based processors and SoCs.
- 2023
Workforce reduction
[1]SiFive reportedly reduces its workforce by approximately 20 percent while maintaining that it will continue supporting its product lines.
- 2022
OpenFive is sold to Alphawave IP Group
[1]Alphawave IP Group acquires the OpenFive business and licenses SiFive processor IP.
- 2021
P270 and P550 processor families announced
[1]SiFive introduces the Linux-capable P270 and high-performance P550 cores; Intel Foundry Services adopts the P550 for its Horse Creek platform.
- 2020
OpenFive is launched
[1]SiFive creates OpenFive as a processor-agnostic custom SoC design business unit.
- 2020
HiFive Unmatched is introduced
[1]SiFive releases a Mini-ITX development platform built around multiple RISC-V cores and intended for more advanced software and hardware development.
- 2019
Security and application expansion
[1]The company announces SiFive Shield, Apex cores, and Intelligence cores for security, mission-critical, and vector-oriented workloads.
- 2018
Open-Silicon acquisition
[1]SiFive acquires Open-Silicon, adding ASIC design and implementation capabilities.
- 2017
Naveed Sherwani becomes CEO
[1]Naveed Sherwani is appointed chief executive as SiFive expands its commercial processor-IP activities.
- 2016
First commercial RISC-V product family
[1]SiFive releases the Freedom Everywhere 310 SoC and HiFive development board, among the earliest commercial products implementing RISC-V.
- 2015
SiFive is founded
[1]Krste Asanović, Yunsup Lee, and Andrew Waterman establish SiFive to commercialize processor technology based on the RISC-V instruction set architecture.
Products and positioning
A commercial RISC-V processor-IP and custom-silicon provider offering an alternative to proprietary processor architectures.
Embedded processor IP
SiFive Essential
The Essential family targets embedded and area-constrained applications. Its designs emphasize efficient use of silicon area, power-conscious operation, and integration into microcontrollers and other specialized SoCs. The family has included widely used embedded RISC-V cores such as the U-series and has been updated through product revisions including the 21G2 release.
Application processor IP · 2021
SiFive Performance
The Performance family is aimed at higher-performance application processing and operating-system-capable systems. It includes Linux-oriented and more powerful 64-bit designs such as the P270 and P550. Customers can integrate these cores into custom chips for networking, computing, consumer systems, and other applications requiring greater processing capability than typical embedded controllers.
AI and vector processor IP · 2019
SiFive Intelligence
The Intelligence family is designed for vector processing, machine learning, and artificial-intelligence workloads. Its portfolio includes the X280, which was licensed by Tenstorrent for AI training and inference products. These processors are intended to provide configurable RISC-V compute resources for customers building domain-specific accelerators and heterogeneous SoCs.
Automotive processor IP
SiFive Automotive
The Automotive portfolio addresses vehicle electronics and automotive semiconductor applications. The designs are intended for integration into automotive SoCs and electronic control systems, with emphasis on configurable processing, functional requirements, and the ability to combine processor cores with customer-specific peripherals and interfaces.
Development hardware · 2016
HiFive development boards
HiFive boards provide hardware platforms for evaluating SiFive RISC-V processors and developing software. Products have ranged from the original HiFive board and microcontroller-oriented platforms to the Linux-capable HiFive Unleashed and the Mini-ITX HiFive Unmatched. Earlier products include the HiFive1, HiFive Unleashed, and original HiFive Unmatched, while later board versions have continued the platform concept.
Security IP and platform architecture · 2019
SiFive Shield
SiFive Shield is a security architecture and platform offering announced to help customers build security features around RISC-V-based designs. It forms part of SiFive’s broader SoC IP portfolio, which can include processor, system, peripheral, connectivity, and security components selected and configured for a customer’s chip.
Custom SoC design · 2020
OpenFive
OpenFive was a SiFive business unit focused on processor-agnostic custom system-on-chip design. It offered customers a route from an SoC template and third-party IP toward designs optimized for power, performance, and area. Alphawave IP Group acquired the business in 2022, so OpenFive is no longer a SiFive-owned offering.
Marketing campaigns
- 2022Cambridge United sponsorship
United Kingdom
SiFive served as the principal sponsor of Cambridge United Football Club during the 2022–23 and 2023–24 seasons. The partnership gave the semiconductor company brand exposure in professional football while associating its name with a UK-based sports audience.
Outcome. The sponsorship covered two reported seasons; a subsequent continuation is not established here.
Brand decisions
2022
Sell OpenFive to Alphawave IP GroupM&ABackground
SiFive decided to divest the custom-SoC design unit while retaining its central processor-IP business.
Action taken
Alphawave IP Group acquired OpenFive and separately licensed SiFive RISC-V processor intellectual property.
Aftermath
The transaction reduced SiFive’s direct exposure to custom SoC services and strengthened the commercial relationship between the two companies.
Reported transaction value. $210 million (2022)
2021
Launch the P270 and P550 processor familiesProduct launchBackground
SiFive was expanding beyond embedded processors into Linux-capable and higher-performance RISC-V computing.
Action taken
The company announced the P270 and P550 and positioned the P550 as its highest-performing RISC-V CPU at the time.
Aftermath
Intel Foundry Services adopted the P550 for the Horse Creek development platform, increasing industry attention around SiFive’s high-performance processor designs.
2020
Create the OpenFive custom-SoC unitStrategyBackground
Customers increasingly wanted complete custom-chip solutions rather than processor cores alone.
Action taken
SiFive established OpenFive to focus on processor-agnostic custom SoC design.
Aftermath
OpenFive was later acquired by Alphawave IP Group in 2022, while SiFive continued concentrating on processor and semiconductor IP.
2018
Acquire Open-SiliconM&ABackground
SiFive sought to add implementation and ASIC design capabilities to its processor-IP business.
Action taken
SiFive acquired Open-Silicon for an undisclosed amount.
Aftermath
The acquisition expanded SiFive’s ability to support custom chip projects; the later OpenFive business was sold to Alphawave IP Group in 2022.
Recent events
SiFive launches P270 and P550 processor cores[3]
Reported:
SiFive announced the launch of its new Performance core series, debuting the P270 and P550 cores. The article identifies the P550 as SiFive's highest-performance product to date.
SiFive launches HiFive Inventor programming kit[4]
Reported:
SiFive, together with Tynker and BBC Learning, launched the Doctor Who-themed HiFive Inventor children’s programming kit in December 2020.
Aerendir and SiFive partner on on-device AI[5]
Reported:
Aerendir teamed up with SiFive to provide device manufacturers with cost-effective on-device AI using SiFive's RISC-V Core.
Sources5 sources
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