# SiFive

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{{Short description|Fabless semiconductor company providing RISC-V processors}}
{{Infobox company
| name = SiFive, Inc.
| logo = SiFive Logo.svg
| type = [Private](/source/Privately_held_company)
| industry = [Semiconductor](/source/Semiconductor)s<ref name="bloomberg" />
| founded = {{Start date and age|September 2015}}<ref name="bloomberg">{{cite web|title=SiFive, Inc.: Private Company Information|url=https://www.bloomberg.com/research/stocks/private/snapshot.asp?privcapId=321806453|website=Bloomberg|accessdate=17 March 2017}}</ref>
| founders = {{Unbulleted list|[Krste Asanović](/source/Krste_Asanovi%C4%87)|Yunsup Lee|Andrew Waterman}}
| hq_location = [Santa Clara, California](/source/Santa_Clara%2C_California), U.S.<ref>{{Cite news |last=Cherney |first=Max A. |date=October 24, 2023 |title=Chip design startup SiFive lays off 20% of staff |url=https://www.reuters.com/technology/open-source-arm-competitor-sifive-lays-off-20-staff-2023-10-24/ |publisher=Reuters}}</ref>
| num_employees = {{circa|500}} (2023)<ref>{{Cite web |last=Takahashi |first=Dean |date=October 11, 2023 |title=SiFive unveils two new high-performance RISC-V processors |url=https://venturebeat.com/games/sifive-unveils-two-new-high-performance-risc-v-processors/ |website=VentureBeat}}</ref>
| key_people = Patrick Little ([CEO](/source/Chief_Executive_Officer))<ref name="ceo" />
| revenue = {{US$|38.1 million|link=yes}} (2023)<ref name="finances">{{Cite news |last=Gurman |first=Mark |date=March 12, 2024 |title=Arm Rival SiFive Expects Licensing Revenue to Surge This Year |url=https://www.bloomberg.com/news/articles/2024-03-12/arm-rival-sifive-expects-licensing-revenue-to-surge-this-year |publisher=Bloomberg News}}</ref>
| operating_income = {{nowrap|{{US$|-113 million}} (2023)<ref name="finances" />}}
| website = {{URL|https://sifive.com}}
}}

'''SiFive, Inc.''' is an American [fabless](/source/Fabless_manufacturing) [semiconductor](/source/semiconductor) IP company and provider of commercial [RISC-V](/source/RISC-V) processors and [silicon chips](/source/Integrated_circuit) based on the RISC-V [instruction set architecture](/source/instruction_set_architecture) (ISA).<ref name=":1">{{Cite web |last=Shilov |first=Anton |date=2016-07-18 |title=SiFive Unveils Freedom Platforms for RISC-V-Based Semi-Custom Chips |url=http://www.anandtech.com/show/10488/sifive-unveils-freedom-platforms-for-riscvbased-semicustom-chips |url-status=dead |archive-url=https://web.archive.org/web/20160719131217/https://www.anandtech.com/show/10488/sifive-unveils-freedom-platforms-for-riscvbased-semicustom-chips |archive-date=July 19, 2016 |access-date=2017-03-17 |website=AnandTech}}</ref> Its products include cores, [SoCs](/source/system_on_a_chip), [IPs](/source/Intellectual_property), and development boards.<ref name=":0">{{Cite web |last=Takahashi |first=Dean |date=2016-11-29 |title=SiFive launches open source RISC-V custom chip |url=https://venturebeat.com/2016/11/29/sifive-launches-open-source-risc-v-custom-chip/ |url-status=live |archive-url=https://web.archive.org/web/20221021162257/https://venturebeat.com/business/sifive-launches-open-source-risc-v-custom-chip/ |archive-date=October 21, 2022 |access-date=2017-03-17 |website=VentureBeat}}</ref>

SiFive was one of the first companies to produce a chip that implemented the RISC-V ISA.<ref>{{Cite web |last=Hall |first=Christine |date=2019-05-28 |title=Companies Pushing Open Source RISC-V Silicon Out to the Edge |url=https://www.datacenterknowledge.com/hardware/companies-pushing-open-source-risc-v-silicon-out-edge |url-status=live |archive-url=https://web.archive.org/web/20190528180140/https://www.datacenterknowledge.com/hardware/companies-pushing-open-source-risc-v-silicon-out-edge |archive-date=May 28, 2019 |access-date=2021-09-07 |website=Data Center Knowledge |language=en}}</ref>

== History ==
In 2015, researchers [Krste Asanović](/source/Krste_Asanovi%C4%87), Yunsup Lee, and Andrew Waterman from the [University of California Berkeley](/source/University_of_California%2C_Berkeley) founded SiFive.<ref name=":1" /><ref name=":0" /> On November 29, 2016, SiFive released the Freedom Everywhere 310 SoC and the HiFive development board.<ref name=":0" /> This made it the first company to produce a chip that implemented the RISC-V ISA, although some universities had already produced RISC-V processors before it.<ref name=":0" /><ref name=":2">{{Cite news |last=Gurman |first=Mark |date=March 12, 2024 |title=Arm Rival SiFive Expects Licensing Revenue to Surge This Year |url=https://news.bloomberglaw.com/private-equity/arm-rival-sifive-expects-licensing-revenue-to-surge-this-year |url-status=live |archive-url= |archive-date= |access-date=March 10, 2026 |work=Bloomberg Law}}</ref>

Naveed Sherwani was appointed CEO in August 2017.<ref>{{Cite web|url=https://venturebeat.com/2017/08/15/custom-processor-maker-sifive-appoints-intel-veteran-as-ceo/|title=Custom processor maker SiFive appoints Intel veteran as CEO {{!}} VentureBeat|date=2017-08-15|website=venturebeat.com|language=en-US|access-date=2017-10-12}}</ref> In October 2017, SiFive did a limited release of its U54-MC, which was reported to be the first RISC-V-based 64-bit quad-core CPU that supported comprehensive operating systems like [Linux](/source/Linux).<ref>{{Cite news|url=https://fossbytes.com/u54-mc-coreplex-ip-linux-open-source-risc-v-processor/|title=Linux Gets Its First Multi-Core, RISC-V Based Open Source Processor|last=Verma|first=Adarsh|date=2017-10-09|work=Fossbytes|access-date=2017-10-12|language=en-US}}</ref><ref>{{Cite news|url=http://www.fudzilla.com/news/processors/44667-2018-will-be-the-year-of-the-risc-v-linux-processors|title=2018 will be the year of the RISC V Linux processors|last=Farrell|first=Nick|access-date=2017-10-12|language=en-gb}}</ref>

In June 2018, SiFive acquired [Open-Silicon](/source/Open-Silicon) for an undisclosed amount and retained its [application-specific integrated circuit](/source/application-specific_integrated_circuit) (ASIC) design capabilities.

In February 2018, SiFive released the [HiFive Unleashed](/source/HiFive_Unleashed), a development board containing a 64-bit SoC with four U54 cores.<ref>{{Cite news|url=https://hackaday.com/2018/02/03/sifive-introduces-risc-v-linux-capable-multicore-processor/|title=SiFive Introduces RISC-V Linux-Capable Multicore Processor|date=2018-02-04|work=Hackaday|access-date=2018-02-05|language=en-US}}</ref><ref>{{Cite web|url=https://www.cnx-software.com/2018/02/04/sifive-introduces-hifive-unleashed-risc-v-linux-development-board-crowdfunding/|title=SiFive Introduces HiFive Unleashed RISC-V Linux Development Board (Crowdfunding)|website=www.cnx-software.com|date=4 February 2018|access-date=2018-02-05}}</ref>

In September 2020, Patrick Little was appointed CEO.<ref name="ceo">{{Cite web|date=2020-09-17|title=SiFive hires Qualcomm exec as CEO for RISC-V alternatives to Nvidia-Arm|url=https://venturebeat.com/2020/09/17/sifive-hires-qualcomm-exec-as-ceo-for-risc-v-alternatives-to-nvidia-arm/|access-date=2021-09-07|website=VentureBeat|language=en-US}}</ref>

In October 2020, SiFive released the HiFive Unmatched, a [Mini-ITX](/source/Mini-ITX) development board with four U74-MC cores, one S7 core, 8GB DDR4 RAM, four [USB 3.2 Gen1](/source/USB_3.0) ports, one PCI Express x16 slot, one PCIe Gen3 x4, one microSD card slot, and Gigabit Ethernet.<ref>{{Cite web|title=SiFive Is Launching The Most Compelling RISC-V Development Board Yet - Phoronix|url=https://www.phoronix.com/scan.php?page=article&item=sifive-riscv-unmatched&num=1|access-date=2020-12-19|website=www.phoronix.com}}</ref> In April 2021, the company also taped out its first system-on-chip on [TSMC](/source/TSMC)'s N5 process technology, making it the first RISC-V-based device to be made using a 5&nbsp;nm node.<ref>{{Cite web|last=Shilov|first=Anton|date=2021-04-13|title=SiFive Tapes Out First 5nm TSMC RISC-V Chip With 7.2 Gbps HBM3|url=https://www.tomshardware.com/news/openfive-tapes-out-5nm-risc-v-soc|access-date=2024-10-22|website=Tom's Hardware|language=en}}</ref>

In June 2021,<ref>{{Cite web|last=Mott|first=Nathaniel|date=2021-06-24|title=Canonical Gives RISC-V a HiFive|url=https://www.tomshardware.com/news/canonical-ubuntu-risc-v|access-date=2024-10-21|website=Tom's Hardware|language=en}}</ref> [Canonical](/source/Canonical_(company)) announced its [Ubuntu](/source/Ubuntu) operating system's support for the HiFive Unmatched and HiFive Unleashed, and the [Barcelona Supercomputing Center](/source/Barcelona_Supercomputing_Center) collaborated with Codeplay Software and SiFive to implement support for the RISC-V V-extension v0.10 in the LLVM compilation infrastructure, providing vector computation capabilities through C/C++ intrinsics.<ref>{{Cite web|title=BSC, Codeplay and SiFive help accelerate applications on RISC-V thanks to V-extension support in LLVM|url=https://www.bsc.es/news/bsc-news/bsc-codeplay-and-sifive-help-accelerate-applications-risc-v-thanks-v-extension-support-llvm|access-date=2021-09-07|website=BSC-CNS|language=en}}</ref>

In summer 2021, reports of a potential buyout of SiFive by [Intel](/source/Intel) and other companies emerged, however Intel's plans were eventually cancelled due to disagreement with SiFive.<ref>{{cite web | url=https://www.crn.com/news/components-peripherals/intel-ends-talks-to-acquire-arm-rival-sifive-for-now-report | title=Intel Ends Talks to Acquire Arm Rival SiFive — for Now: Report &#124; CRN }}</ref><ref>{{cite web | url=https://www.eetimes.com/intel-looking-to-buy-sifive-for-2bn/ | title=Intel Looking to Buy SiFive for $2bn | date=14 June 2021 }}</ref>

In 2023, it was reported that SiFive had laid off 20% of its staff.<ref>{{Cite news |last=Cherney |first=Max |date=October 25, 2023 |editor1-last=Coates |editor1-first=Stephen |editor2-last=Reese|editor2-first=Chris  |title=Chip design startup SiFive lays off 20% of staff |url=https://www.reuters.com/technology/open-source-arm-competitor-sifive-lays-off-20-staff-2023-10-24/ |url-status=live |archive-url=https://web.archive.org/web/20231025104014/https://www.reuters.com/technology/open-source-arm-competitor-sifive-lays-off-20-staff-2023-10-24/ |archive-date=October 25, 2023 |access-date=October 22, 2024 |work=[Reuters](/source/Reuters)}}</ref>

SiFive was the main sponsor of [Cambridge United F.C.](/source/Cambridge_United_F.C.) for the [2022/23](/source/2022%E2%80%9323_EFL_League_One) and the [2023/24](/source/2023%E2%80%9324_EFL_League_One) seasons.<ref>{{Cite web |date=2022-08-04 |title=Cambridge United unveils SiFive as first team kit sponsor |url=https://www.cambridgeindependent.co.uk/news/cambridge-united-unveils-sifive-as-first-team-kit-sponsor-9267609/ |access-date=2024-06-21 |website=Cambridge Independent |language=en}}</ref><ref>{{Cite web |title=SiFive arrives on the pitch in Cambridge |url=https://www.sifive.com/blog/sifive-arrives-on-the-pitch-in-cambridge |access-date=2024-06-21 |website=SiFive |language=en-us}}</ref>

== Business development ==
In September 2015, SiFive raised $5 million in Series A funding. In May 2017 SiFive raised $8.5 million in Series B.<ref>{{Cite web |last=Takahashi |first=Dean |date=May 8, 2017 |title=SiFive raises $8.5 million for licensable custom microprocessors |url=https://venturebeat.com/entrepreneur/sifive-raises-8-5-million-for-licensable-custom-microprocessors/ |website=VentureBeat}}</ref>

In April 2018, SiFive received $50.6 million Series C funding,<ref>{{Cite web|title=SiFive raises $50.6 million for licensable custom microprocessors|url=https://venturebeat.com/2018/04/02/sifive-raises-50-6-million-for-licensable-custom-microprocessors/|date=2018-04-02|website=VentureBeat|language=en-US|access-date=2020-05-27}}</ref> including a major amount from [Intel Capital](/source/Intel_Capital).

In June 2019, SiFive received $65.4 million in a Series D funding round<ref>{{Cite web|url=https://www.bizjournals.com/sanjose/news/2019/06/07/the-funded-9-bay-area-startups-raised-over-300m-at.html|title=9 Bay Area startups raised over $300 million at week's end - Silicon Valley Business Journal|website=www.bizjournals.com|access-date=2020-05-27}}</ref> led by existing investors Sutter Hill Ventures, Chengwei Capital, Spark Capital, Osage University Partners and Huami, alongside new investor [Qualcomm Ventures](/source/Qualcomm_Ventures). This brought the total investment in SiFive to $125 million.

On October 23, 2019, at the Linley Fall Processor Conference, SiFive announced the release of SiFive Shield, a platform security architecture. In December 2019, the company announced the SiFive Apex cores for mission-critical markets and SiFive Intelligence cores for vector processing workloads. Later that month, [Samsung](/source/Samsung) also announced it will be using SiFive RISC-V cores for SoCs, automotive, and 5G applications.<ref>{{Cite web|title=Samsung to Use SiFive RISC-V Cores for SoCs, Automotive, 5G Applications|url=https://www.anandtech.com/show/15228/samsung-to-use-riscv-cores|archive-url=https://web.archive.org/web/20191212200531/https://www.anandtech.com/show/15228/samsung-to-use-riscv-cores|url-status=dead|archive-date=December 12, 2019|last=Shilov|first=Anton|website=www.anandtech.com|access-date=2020-05-27}}</ref>

In January 2020, SiFive hired [Chris Lattner](/source/Chris_Lattner), an American software engineer best known as the main author of [LLVM](/source/LLVM) and related projects such as the [Clang](/source/Clang) compiler and the [Swift programming language](/source/Swift_(programming_language)). He joined SiFive as Senior Vice President of Platform Engineering after two years at [Google](/source/Google).<ref>{{Cite web|title=The star Apple engineer behind its Swift programming language just left Google and went to a new job at hot AI startup SiFive|url=https://www.businessinsider.com/chris-lattner-former-apple-google-engineer-swift-ai-startup-sifive-2020-2|last=Chan|first=Rosalie|website=Business Insider|access-date=2020-05-27}}</ref>

In August 2020, SiFive received $60 million in a Series E funding round<ref>{{Cite news|last=Nellis|first=Stephen|date=2020-08-11|title=Arm rival SiFive raises $60 million from SK Hynix, Aramco|language=en|work=Reuters|url=https://www.reuters.com/article/us-sifive-tech-idUSKCN2571UL|access-date=2020-09-16}}</ref> led by investors [SK Hynix](/source/SK_Hynix) and [Saudi Aramco](/source/Saudi_Aramco). This brought the total investment in SiFive to $186 million. That same month, SiFive announced the creation of the OpenFive business unit to focus on the creation of processor-agnostic custom SoC design.<ref>{{Cite web|title=SiFive Launches OpenFive As Custom Silicon Business Unit For RISC-V, ARM, Other ISAs - Phoronix|url=https://www.phoronix.com/scan.php?page=news_item&px=SiFive-OpenFive|access-date=2021-09-07|website=www.phoronix.com}}</ref>

Chip company [Tenstorrent](/source/Tenstorrent), headed by former top AMD engineers, including CTO [Jim Keller](/source/Jim_Keller_(engineer)), licensed SiFive's Intelligence X280 processor cores in October 2020 into its homegrown AI training and inference chips.<ref>{{Cite web
|last1=Williams
|first1=Chris
|title=What links AMD CPU guru Jim Keller, an AI chip upstart, and SiFive? This vector-crunching 64-bit RISC-V processor
|url=https://www.theregister.com/2021/04/22/tenstorrent_sifive_intelligence_x280_licensed/|access-date=2021-09-07
|website=www.theregister.com
|language=en}}</ref> [Renesas Electronics](/source/Renesas_Electronics) also announced partnering with SiFive to design chips for vehicles.<ref>{{Cite web|date=2021-04-22|title=SiFive Intelligence platform tapped by Tenstorrent and Renesas|url=https://linuxgizmos.com/sifive-intelligence-platform-tapped-by-tenstorrent-and-renesas/|access-date=2021-09-07|website=LinuxGizmos.com}}</ref>

In June 2021, SiFive launched a new processor family with two core designs: P270, a Linux-capable CPU; and P550, the highest-performing RISC-V CPU.<ref>{{Cite web|last=Salter|first=Jim|date=2021-06-22|title=SiFive's brand-new P550 is one of the world's fastest RISC-V CPUs|url=https://arstechnica.com/gadgets/2021/06/sifives-brand-new-p550-is-one-of-the-worlds-fastest-risc-v-cpus/|access-date=2021-09-07|website=Ars Technica|language=en-us}}</ref><ref>{{Cite web|date=2021-06-22|title=SiFive aims to challenge Arm with new tech, pairs with Intel on effort|url=https://www.reuters.com/technology/sifive-aims-challenge-arm-with-new-tech-pairs-with-intel-effort-2021-06-22/|access-date=2021-09-07|website=Reuters|language=en}}</ref> At the same time, [Intel's](/source/Intel) Foundry Service adopted P550 for use in its Horse Creek platform, a RISC-V development platform built on Intel's newest 7&nbsp;nm process node,<ref>{{Cite web|last=Cutress|first=Dr Ian|title=Intel to Create RISC-V Development Platform with SiFive P550 Cores on 7nm in 2022|url=https://www.anandtech.com/show/16780/intel-to-create-riscv-development-platform-with-sifive-p550-cores-on-7nm-in-2022|archive-url=https://archive.today/20210626143727/https://www.anandtech.com/show/16780/intel-to-create-riscv-development-platform-with-sifive-p550-cores-on-7nm-in-2022|url-status=dead|archive-date=June 26, 2021|access-date=2021-09-07|website=www.anandtech.com}}</ref> Intel 4.<ref>{{Cite web|last=Cutress|first=Dr Ian|title=Intel's Process Roadmap to 2025: with 4nm, 3nm, 20A and 18A?!|url=https://www.anandtech.com/show/16823/intel-accelerated-offensive-process-roadmap-updates-to-10nm-7nm-4nm-3nm-20a-18a-packaging-foundry-emib-foveros|archive-url=https://web.archive.org/web/20210726210347/https://www.anandtech.com/show/16823/intel-accelerated-offensive-process-roadmap-updates-to-10nm-7nm-4nm-3nm-20a-18a-packaging-foundry-emib-foveros|url-status=dead|archive-date=July 26, 2021|access-date=2021-09-07|website=www.anandtech.com}}</ref> The announcement furthered speculation of a potential acquisition of SiFive by Intel, which reportedly offered to acquire SiFive for $2 billion.<ref>{{Cite news|date=2021-06-10|title=Chipmaker SiFive Is Said to Draw Intel Takeover Interest|language=en|work=Bloomberg.com|url=https://www.bloomberg.com/news/articles/2021-06-10/chipmaker-sifive-is-said-to-draw-intel-takeover-interest|access-date=2021-09-07}}</ref>

As part of SiFive's “relentless innovation” program, the company announced SiFive 21G2 update for the SiFive Essential family including 11% faster U74 cores.<ref>{{Cite web|date=2021-07-30|title=SiFive speeds up RISC-V U74 cores as Canaan unveils a 3-TOPS Kendryte K510|url=https://linuxgizmos.com/sifive-speeds-up-risc-v-u74-cores-as-canaan-unveils-a-3-tops-kendryte-k510/|access-date=2021-09-07|website=LinuxGizmos.com}}</ref>

In March 2022, SiFive received $175&nbsp;million in a Series F funding round led by [Coatue Management](/source/Coatue_Management), valuing the company at over $2.5&nbsp;billion. This brought the total investment in SiFive to over $350&nbsp;million.<ref>{{cite web| url=https://www.businesswire.com/news/home/20220316005396/en/SiFive-Leadership-in-RISC-V-Powers-2.5B-Company-Valuation| title=SiFive Leadership in RISC-V Powers $2.5B+ Company Valuation| website=businesswire.com| date=16 March 2022}}</ref>

In March 2022, Alphawave IP Group plc acquired SiFive's OpenFive business unit for $210 million. As part of the transaction, Alphawave also licensed RISC-V processor intellectual property from SiFive.<ref>{{Cite web |title=Alphawave IP Announces Definitive Agreement to Acquire Entire OpenFive Business Unit from SiFive for US$210m in cash |url=https://www.design-reuse.com/news/11913-alphawave-ip-announces-definitive-agreement-to-acquire-entire-openfive-business-unit-from-sifive-for-us-210m-in-cash/ |access-date=2026-01-08 |website=www.design-reuse.com}}</ref><ref>{{Cite web |last=Brown |first=Eric |date=2022-03-16 |title=SiFive raises $175 million after selling OpenFive SoC design unit to Alphawave |url=https://linuxgizmos.com/sifive-raises-175-million-after-selling-openfive-soc-design-unit-to-alphawave/ |access-date=2026-01-08 |website=LinuxGizmos.com}}</ref>

In October 2023, SiFive laid off approximately 20% (~140) of its 650 employees. SiFive reiterated its commitment to existing products and lines and stated that the company is "well funded for years in the future and continue to work".<ref>{{cite web|first=Ian |last=Cutress |date=2023-10-24 |title=The Risk of Risc-V: What's Going On (Updated)|url=https://morethanmoore.substack.com/p/the-risk-of-risc-v-whats-going-on|access-date=2023-10-25|website=More Than Moore |language=en}}</ref><ref>{{Cite news |date=2024-03-12 |title=Arm Rival SiFive Expects Licensing Revenue to Surge This Year |url=https://www.bloomberg.com/news/articles/2024-03-12/arm-rival-sifive-expects-licensing-revenue-to-surge-this-year |access-date=2024-03-17 |work=Bloomberg.com |language=en}}</ref>

On April 9, 2026, SiFive announced it had raised $400 million in a Series G funding round led by Atreides Management, valuing the company at $3.65 billion. The financing, which included participation from NVIDIA and Apollo Global Management, was described by the company as its final private round before a potential initial public offering.<ref name="sifive-series-g">{{Cite news
 |url=https://www.reuters.com/business/sifive-raises-400-million-atreides-nvidia-data-center-chip-technology-2026-04-09/
 |title=SiFive raises $400 million from Atreides, Nvidia for data-center chip technology
 |date=2026-04-09
 |work=Reuters
 |access-date=2026-05-06
}}</ref>

== Products ==
The company is among the earliest commercial providers of RISC-V hardware. Its technology has been used in a variety of applications, including [NASA](/source/NASA)'s future spaceflight computing platform.<ref>{{Cite web |date=2024 |title=NASA's High Performance Spaceflight Computer |url=https://www.nasa.gov/wp-content/uploads/2024/07/hpsc-white-paper-tmg-23jul2024.pdf |access-date=10 March 2026 |website=[NASA](/source/NASA)}}</ref><ref>{{Cite web |last= |first= |date=2022-09-06 |title=NASA Selects SiFive and Makes RISC-V the Go-to Ecosystem for Future Space Missions {{!}} SiFive, Business Wire |url=https://riscv.org/blog/nasa-selects-sifive-and-makes-risc-v-the-go-to-ecosystem-for-future-space-missions-sifive-business-wire/ |access-date=2026-03-10 |website=RISC-V International |language=en-US}}</ref> The company operates on a licensing and royalty business model, competing primarily with proprietary architectures such as [ARM](/source/ARM_architecture_family).<ref name=":2" />
* '''[RISC-V](/source/RISC-V) cores: SiFive core series''' – SiFive provides a range of 32-bit and 64-bit designs across four primary categories: high-performance application cores (Performance), machine learning vector processors (Intelligence), safety-certified automotive cores (Automotive), and area-optimized embedded processors (Essential).<ref>{{Cite web |title=RISC-V Core IP Portfolio |url=https://www.sifive.com/risc-v-core-ip |access-date=2026-03-10 |website=SiFive |language=en-us}}</ref>
* '''SoC IP''' – The SoC IP is customizable, or customers choose from memory interface IP, connectivity IP, or system and peripheral IP.
* '''Custom SoC''' – Starting with an SoC template, users can create custom SoC designs to be optimized for power, performance, and area.
* '''Boards and software''' – SiFive develops RISC-V development boards, including the HiFive Premier P550 and HiFive Unmatched Rev B. Previously developed and now discontinued products include the FE310 microcontroller, HiFive1, [HiFive Unleashed](/source/HiFive_Unleashed), the original HiFive Unmatched, and other development boards and related software.<ref>{{Cite web |last=Halfacree |first=Gareth |date=January 21, 2022 |title=SiFive Discontinues Its HiFive Unmatched RISC-V PC Boards Following "Supply Chain Issues" |url=https://www.hackster.io/news/sifive-discontinues-its-hifive-unmatched-risc-v-pc-boards-following-supply-chain-issues-1a1a5d4b7385 |url-status=live |access-date=2026-01-09 |website=Hackster.io |language=en}}</ref><ref>{{Cite web |last=Mott |first=Nathaniel |date=2021-06-24 |title=Canonical Gives RISC-V a HiFive |url=https://www.tomshardware.com/news/canonical-ubuntu-risc-v |url-status=live |access-date=2026-01-09 |website=Tom's Hardware |language=en}}</ref><ref>{{Cite web |title=RISC-V Boards: HiFive™ Boards by SiFive |url=https://www.sifive.com/boards |access-date=2026-01-09 |website=SiFive |language=en-us}}</ref><ref>{{Cite web |last=businesswire |date=2024-04-09 |title=SiFive Unveils the HiFive Premier P550, the First Commercially Available Out-of-Order RISC-V Development Board |url=https://www.silicon.co.uk/press-release/sifive-unveils-the-hifive-premier-p550-the-first-commercially-available-out-of-order-risc-v-development-board |url-status=live |access-date=2026-01-09 |website=Silicon UK |language=en-GB}}</ref>

== DesignShare platform ==
[DesignShare](/source/DesignShare) was an [open source](/source/open_source) platform for building prototypes. SiFive partnered with vendors to provide IP to customers designing custom chip prototypes without paying IP fees in advance. Once chip designs were ready for mass production, customers would pay for the IP. DesignShare partners included [Brite Semiconductor](/source/Brite_Semiconductor), [Rambus](/source/Rambus), [Chipus Microelectronics](/source/Chipus_Microelectronics), and more.

== References ==
{{Reflist|30em}}

Category:Fabless semiconductor companies
Category:Semiconductor companies of the United States
Category:Open hardware organizations and companies
Category:Open microprocessors
Category:American companies established in 2015
Category:Companies based in Santa Clara, California
Category:2015 establishments in California
Category:RISC-V

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Adapted from the Wikipedia article [SiFive](https://en.wikipedia.org/wiki/SiFive) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/SiFive?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.