Technology companies based in the San Francisco Bay Area

Google LLC (, ) is an American multinational technology corporation focused on information technology, online advertising, search engine technology, email, cloud computing, software, quantum computing, e-commerce, consumer electronics, and artificial intelligence (AI). It has been referred to as "the most powerful company in the world" by the BBC, and is one of the world's most valuable brands. Google's parent company Alphabet Inc. has been described as a Big Tech company.

Apple Inc. is an American multinational technology company headquartered in Cupertino, California, in Silicon Valley, and known for consumer electronics, software and online services. Founded in 1976 as Apple Computer Company by Steve Jobs, Steve Wozniak and Ronald Wayne, the company was incorporated by Jobs and Wozniak as Apple Computer, Inc. the following year. It was renamed to its current name in 2007 as the company expanded its focus from computers to consumer electronics. Apple is one of the Big Tech companies.

Yahoo (, styled 'yahoo!''''' in its logo) is an American web portal that provides the search engine Yahoo Search and related services including My Yahoo, Yahoo Mail, Yahoo News, Yahoo Finance, Yahoo Sports, y!entertainment, yahoo!life, and its advertising platform, Yahoo Native. It is operated by the namesake company Yahoo! Inc., which is 90% owned by Apollo Global Management and 10% by Verizon.

The Hewlett-Packard Company, commonly shortened to Hewlett-Packard ( ) or HP, was an American multinational information technology company. It was founded by Bill Hewlett and David Packard in 1939 in a one-car garage in Palo Alto, California. Growing to become an influential high-tech powerhouse at the heart of Silicon Valley, the company was known for its progressive business philosophy, deemed the HP Way. HP developed and provided a wide variety of hardware components, as well as software and related services, to consumers, small and medium-sized businesses (SMBs), and fairly large companies

American technology company

Nvidia Corporation ( ) is an American technology company headquartered in Santa Clara, California. Founded in 1993 by Jensen Huang, Chris Malachowsky, and Curtis Priem, it develops graphics processing units (GPUs), systems on chips (SoCs), and application programming interfaces (APIs) for data science, high-performance computing, video games, and mobile and automotive applications. Nvidia has been described as a Big Tech company.

Advanced Micro Devices, Inc. (AMD) is an American multinational semiconductor company headquartered in Santa Clara, California, with significant operations in Austin, Texas. It develops central processing units (CPUs), graphics processing units (GPUs), field-programmable gate arrays (FPGAs), system-on-chips (SoCs), and high-performance computer components. AMD serves a wide range of business and consumer markets, including personal computers (PCs), gaming, data centers, and embedded systems.

former American web traffic analysis company

American multinational technology conglomerate

Cisco Systems, Inc. (using the trademark Cisco) is an American multinational technology conglomerate corporation that develops, manufactures, and sells hardware, software, telecommunications equipment and other high-technology services and products focused on networking, cyber security and AI. Cisco specializes in specific tech markets, such as the Internet of things (IoT), domain security, videoconferencing, and energy management, including products such as Webex, OpenDNS, Jabber, and Jasper. The company is headquartered in San Jose, California and, as of December 2025, has a market capitaliz

American computer storage corporation

Netscape Communications Corporation (originally Mosaic Communications Corporation) was an American independent computer services company with headquarters in Mountain View, California, and then Dulles, Virginia. Its Netscape web browser was once dominant but lost to Internet Explorer and other competitors in the first browser war, with its market share falling from more than 90 percent in the mid-1990s to less than one percent in 2006. An early Netscape employee, Brendan Eich, created the JavaScript programming language, the most widely used language for client-side scripting of web pages. A f

American data storage company

Cloudflare, Inc. is an American technology company headquartered in San Francisco, California, that provides a range of internet services, including content delivery network (CDN) services, cloud cybersecurity, DDoS mitigation, and ICANN-accredited domain registration. The company's services act primarily as a reverse proxy between website visitors and a customer's hosting provider, improving performance and protecting against malicious traffic.

GoPro, Inc. (marketed as GoPro or as goPRO) is an American technology company founded in 2002 by Nick Woodman. It manufactures action cameras and develops its own mobile apps and video-editing software. GoPro cameras are widely used for adventure sports, travel recording, and outdoor activities. Founded as Woodman Labs, Inc, the company is based in San Mateo, California.

American IT company

former American company

SolarCity Corporation was a publicly traded company headquartered in Fremont, California, that sold and installed solar energy generation systems as well as other related products and services to residential, commercial, and industrial customers. The company was founded on July 4, 2006, by Peter and Lyndon Rive, the cousins of SpaceX and Tesla CEO Elon Musk. Tesla acquired SolarCity in 2016, at a cost of approximately US$2.6 billion (equivalent to $ billion in ) and reorganized its solar business into Tesla Energy.

Sandisk Corporation (formerly branded SanDisk) is an American multinational computer semiconductor company based in Milpitas, California, that designs and manufactures flash memory products, including memory cards, USB flash drives, and solid-state drives (SSDs). It was founded in 1988 as SunDisk by Eli Harari, Sanjay Mehrotra, and Jack Yuan. The name is a portmanteau of the founder’s name Sanjay and disk.

Dolby Laboratories, Inc. (Dolby Labs or simply Dolby) is an American technology corporation specializing in audio noise reduction, audio encoding/compression, spatial audio, and high-dynamic-range television (HDR) imaging. Dolby licenses its technologies to consumer electronics manufacturers.

Xilinx, Inc. ( ) was an American technology and semiconductor company that primarily supplied programmable logic devices. The company is renowned for inventing the first commercially viable field-programmable gate array (FPGA). It also pioneered the first fabless manufacturing model.

thumb|right|Branch office in Sunnyvale, California which was formerly home to CrowdStrike headquarters CrowdStrike Holdings, Inc. is an American cybersecurity technology company based in Austin, Texas. It provides endpoint security, threat intelligence, and cyberattack response services.

AltaVista was a web search engine established in 1995. It became one of the most-used early search engines, but lost ground to Google and was purchased by Yahoo! in 2003, which retained the brand, but based all AltaVista searches on its own search engine. On July 8, 2013, the service was shut down by Yahoo!, and since then the domain has redirected to Yahoo!'s own search site.

semi-secret research and development company by Alphabet Inc.

American information technology company

American multinational technology company

1992–2010 American electronics company

American company

Fitbit is a line of wireless-enabled wearable technology, physical fitness monitors and activity trackers such as smartwatches, pedometers and monitors for heart rate, quality of sleep, and stairs climbed as well as related software. It operated as an American consumer electronics and fitness company from 2007 to 2021.

American company

NetApp, Inc. is an American data infrastructure company that provides unified data storage, integrated data services, and cloud operations (CloudOps) solutions to enterprise customers. The company is based in San Jose, California. It has ranked in the Fortune 500 from 2012 to 2021. Founded in 1992 with an initial public offering in 1995, NetApp offers cloud data services for management of applications and data both online and physically.

Maxtor Corporation was an American computer hard disk drive manufacturer. Founded in 1982, it was the third largest hard disk drive manufacturer in the world before being purchased by Seagate in 2006. It was revived as a brand in 2016.

Theranos Inc. () was an American privately held corporation that was touted as a breakthrough health technology company. Founded in 2003 by then 19-year-old Elizabeth Holmes, Theranos raised more than US$700 million from venture capitalists and private investors, resulting in a $9 billion valuation at its peak in 2013 and 2014. The company claimed that it had devised blood tests that could be performed rapidly and accurately, while requiring very small amounts of blood, all using compact automated devices that the company had developed. These claims were proven to be false.

Netgear, Inc. (stylized as NETGEAR in all caps), is an American computer networking company based in San Jose, California, with offices in about 22 other countries. It produces networking hardware for consumers, businesses, and service providers. The company operates in three business segments: retail, commercial, and as a service provider.

American computer peripherals and hardware company

American fabless semiconductor company

NexGen, Inc. was a private semiconductor company based in Milpitas, California, that designed x86 microprocessors until it was purchased by AMD on January 16, 1996. NexGen was a fabless design house that designed its chips but relied on other companies for production. NexGen's chips were produced by IBM's Microelectronics division in Burlington, Vermont, alongside PowerPC and DRAM parts.

American life sciences company that provides instruments, software, services, and consumables for the entire laboratory workflow

23andMe Holding Co. is an American personal genomics and biotechnology company based in South San Francisco, California. It is best known for providing a direct-to-consumer genetic testing service in which customers provide a saliva sample that is laboratory analysed, using single nucleotide polymorphism genotyping, to generate reports relating to the customer's ancestry and genetic predispositions to health-related topics. The company's name is derived from the 23 pairs of chromosomes in a diploid human cell.

thumb|right|Former headquarters in Mountain View, California

American company

American home automation producer by Google

Rambus Inc. is an American technology company that designs, develops and licenses chip interface technologies and architectures that are used in digital electronics products. The company, founded in 1990, is well known for inventing RDRAM and for its intellectual property-based litigation following the introduction of DDR-SDRAM memory.

American semiconductor company

cyber-security company

Super Micro Computer, Inc., doing business as Supermicro, is an American information technology company based in San Jose, California. The company is one of the largest producers of high-performance and high-efficiency servers, while also providing server management software, and storage systems for various markets, including enterprise data centers, cloud computing, artificial intelligence, 5G, and edge computing. Supermicro was founded in 1993, and has manufacturing operations in Silicon Valley, the Netherlands, and in Taiwan at its Science and Technology Park.

company

American company

Juul Labs, Inc. (, stylized as JUUL Labs) is an American electronic cigarette company headquartered in San Francisco. Its flagship product is the Juul electronic cigarette, which atomizes nicotine salts derived from tobacco supplied by one-time use cartridges. Juul Labs was co-founded by Adam Bowen and James Monsees as part of Pax Labs and started selling the Juul device in 2015. In 2017, Juul Labs was spun off from Pax Labs, after which Altria acquired a 35% stake in the company for $12.8 billion on December 20, 2018. Juul received a $2 billion bonus to distribute among its 1,500 em

American financial services and digital payments conglomerate based in San Francisco, California

semiconductors and software designer

Signetics Corporation was an American electronics manufacturer specifically established in Silicon Valley to make integrated circuits. Founded in 1961, they went on to develop a number of early microprocessors and support chips, as well as the widely used 555 timer chip. The company was bought by Philips in 1975 and incorporated in Philips Semiconductors (now NXP).

American company that designs, manufactures, and sells analog and mixed-signal integrated circuits

American corporation

American company

company

American solar energy company

American semiconductor developer

The YubiKey is a collection of hardware authentication devices manufactured by Yubico AB (Nasdaq Stockholm: YUBICO), a company founded in 2007 by Jakob and Stina Ehrensvärd and headquartered in Stockholm, Sweden, with an American subdivision incorporated in Santa Clara California.

aerospace company