# List of companies with in-house R&D in San Jose

Tamtam tracks 103 companies with in-house R&D headquartered in San Jose. This list ranks the 30 largest by number of employees on LinkedIn, led by Cisco, Adobe and PayPal. Their median headcount is 5,410. Half of them were founded in 1989 or later.

This selection of companies in San Jose highlights a strong concentration of software development firms, alongside significant players in computer hardware and electronics manufacturing. Notable examples include Cisco, specializing in Internet solutions and networking technologies; Adobe, which provides digital media and marketing solutions; PayPal, enabling global money movement; and eBay, connecting millions of buyers and sellers worldwide. Many of these companies were founded in the 1980s and 1990s, indicating a mature and established technology hub.

A clear pattern is the dominance of companies focused on digital infrastructure and services. Whether it is data storage with WD, cybersecurity with Symantec and Zscaler, or cloud software with Nutanix, these firms collectively underpin much of the modern digital economy. The presence of semiconductor manufacturers like Maxim Integrated further emphasizes the depth of technological expertise in San Jose.

🇺🇸 San Jose · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Cisco](https://www.tamtam.ai/c/cisco) (cisco.com)<br>A technology company founded in 1984, specializing in hardware, software, and services for Internet solutions and networking technologies | Software Development | 🇺🇸 San Jose | 95,899 | 1984 |
| 2 | [Adobe](https://www.tamtam.ai/c/adobe) (adobe.com)<br>It provides digital media and marketing solutions, enabling users to create and deliver engaging experiences for various audiences effectively. | Software Development | 🇺🇸 San Jose | 42,354 | 1982 |
| 3 | [PayPal](https://www.tamtam.ai/c/paypal) (paypal.com)<br>Enables fast, easy, enjoyable money movement for individuals and businesses globally, unlocking opportunities and empowering everyday financial interactions for millions. | Software Development | 🇺🇸 San Jose | 38,343 | 1998 |
| 4 | [eBay](https://www.tamtam.ai/c/ebay) (ebay.com)<br>This company creates pathways to connect millions of sellers and buyers globally, empowering customers to grow and thrive with innovative technology | Technology, Information and Internet | 🇺🇸 San Jose | 27,000 |  |
| 5 | [Sanmina](https://www.tamtam.ai/c/sanmina) (sanmina.com)<br>A leading integrated manufacturing solutions provider offering end-to-end services to OEMs in various industries worldwide | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 San Jose | 22,931 | 1980 |
| 6 | [WD](https://www.tamtam.ai/c/wd) (westerndigital.com)<br>This company creates innovative data storage solutions for current technology and future advancements | Computer Hardware Manufacturing | 🇺🇸 San Jose | 22,696 | 1970 |
| 7 | [Broadcom Software](https://www.tamtam.ai/c/broadcom-software) (broadcom.com)<br>Global software leader optimizing and protecting complex hybrid environments for multinational companies with industry-leading business-critical software, enabling scalability, agility, and security | Software Development | 🇺🇸 San Jose | 17,981 |  |
| 8 | [Symantec](https://www.tamtam.ai/c/symantec) (broadcom.com)<br>It offers comprehensive cybersecurity solutions for Endpoint, Network, Data, and Cloud security, catering to both individuals and enterprises. | Software Development | 🇺🇸 San Jose | 12,852 | 1982 |
| 9 | [NetApp](https://www.tamtam.ai/c/netapp) (netapp.com)<br>It builds intelligent data infrastructure, enabling applications to utilize any data from anywhere, enhancing data management and accessibility. | Software Development | 🇺🇸 San Jose | 12,680 | 1992 |
| 10 | [Cadence](https://www.tamtam.ai/c/cadence) (cadence.com)<br>Development of software, hardware, and IP enabling innovative electronic product design across diverse markets like 5G, automotive, aerospace, and healthcare. | Software Development | 🇺🇸 San Jose | 11,424 | 1988 |
| 11 | [Nutanix](https://www.tamtam.ai/c/nutanix) (nutanix.com)<br>Global leader in cloud software, providing a platform for running apps and data across clouds, simplifying operations for businesses worldwide | Software Development | 🇺🇸 San Jose | 9,917 |  |
| 12 | [Logitech](https://www.tamtam.ai/c/logitech) (logitech.com)<br>Innovative hardware and software solutions bringing people together in work, creation, gaming, and streaming, with a focus on sustainability | Computers and Electronics Manufacturing | 🇺🇸 San Jose | 9,325 | 1981 |
| 13 | [Zscaler](https://www.tamtam.ai/c/zscaler) (zscaler.com)<br>Leading organization enabling secure network and application transformation for mobile and cloud-first world, offering fast, secure, cloud-delivered services globally for enhanced cybersecurity | Computer and Network Security | 🇺🇸 San Jose | 8,865 | 2007 |
| 14 | [Supermicro](https://www.tamtam.ai/c/supermicro) (supermicro.com)<br>A global technology leader providing innovative solutions for Enterprise, Cloud, AI, 5G Telco/Edge IT Infrastructure, including servers, storage, IoT, switches, and related services | Computer Hardware Manufacturing | 🇺🇸 San Jose | 5,562 | 1993 |
| 15 | [Maxim Integrated](https://www.tamtam.ai/c/maxim-integrated) (analog.com)<br>Semiconductor company specializing in analog and mixed-signal integrated circuits, now part of Analog Devices corporation. | Semiconductor Manufacturing | 🇺🇸 San Jose | 5,410 | 1983 |
| 16 | [HPE Aruba Networking](https://www.tamtam.ai/c/hpe-aruba-networking) (hpe.com)<br>Design and delivery of Mobility-Defined Networks enabling advanced connectivity and empowerment for tech-savvy users in modern environments. | IT Services and IT Consulting | 🇺🇸 San Jose | 4,903 |  |
| 17 | [Automation Anywhere](https://www.tamtam.ai/c/automation-anywhere) (automationanywhere.com)<br>Provides agentic automation by combining goal-driven AI agents, RPA, APIs, and human expertise to orchestrate mission-critical enterprise workflows end-to-end, delivering measurable outcomes across various sectors. | Software Development | 🇺🇸 San Jose | 4,542 |  |
| 18 | [Roku](https://www.tamtam.ai/c/roku) (weareroku.com)<br>A leading streaming TV platform offering Roku-branded hardware, smart home systems, and original content, reaching millions of households worldwide Join us at wearerokucom | Software Development | 🇺🇸 San Jose | 4,386 | 2002 |
| 19 | [HGST, a Western Digital brand](https://www.tamtam.ai/c/hgst-a-western-digital-brand) (westerndigital.com)<br>A global leader in data storage solutions focused on driving data center transformation with innovative, efficient, and reliable technology for various industries | Computer Hardware Manufacturing | 🇺🇸 San Jose | 4,046 |  |
| 20 | [eInfochips (An Arrow Company)](https://www.tamtam.ai/c/einfochips-an-arrow-company) (einfochips.com)<br>A global provider of product engineering, semiconductor design, and IoT solutions across various cloud platforms with a focus on innovation and client success | IT Services and IT Consulting | 🇺🇸 San Jose | 4,006 | 1995 |
| 21 | [Lumentum](https://www.tamtam.ai/c/lumentum) (lumentum.com)<br>A leading designer and manufacturer of optical and photonic products for optical networking, laser applications, telecom, enterprise, data centers, and advanced manufacturing worldwide | Semiconductor Manufacturing | 🇺🇸 San Jose | 3,690 | 2015 |
| 22 | [BILL](https://www.tamtam.ai/c/bill) (bill.com)<br>Platform simplifying and automating financial workflows, payments, and cash management for small and midsize businesses with AI-enabled software. | Software Development | 🇺🇸 San Jose | 3,402 | 2006 |
| 23 | [Cypress Semiconductor Corporation](https://www.tamtam.ai/c/cypress-semiconductor-corporation) (infineon.com)<br>Closing in April, a company will merge with Infineon Join their community for updates and news on their services | Semiconductor Manufacturing | 🇺🇸 San Jose | 2,581 | 1982 |
| 24 | [Calix](https://www.tamtam.ai/c/calix) (calix.com)<br>Calix provides platforms and services for communications service providers to optimize networks, subscriber experiences, and generate revenue from smart homes and businesses | Software Development | 🇺🇸 San Jose | 2,533 | 1999 |
| 25 | [Bloom Energy](https://www.tamtam.ai/c/bloom-energy) (bloomenergy.com)<br>Bloom Energy provides sustainable and reliable distributed energy solutions to businesses worldwide, helping them lower costs, reduce emissions, and increase energy independence | Fuel Cell Manufacturing | 🇺🇸 San Jose | 2,269 | 2001 |
| 26 | [TAIYO YUDEN](https://www.tamtam.ai/c/taiyo-yuden) (yuden.co.jp)<br>A global technology company specializing in capacitors, inductors, circuit products, SAW/FBAR devices, and energy devices for various industries since 1950 | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 San Jose | 2,185 |  |
| 27 | [Synaptics Incorporated](https://www.tamtam.ai/c/synaptics-incorporated) (synaptics.com)<br>This company is revolutionizing human interactions with technology by providing innovative solutions for home, work, car, and on-the-go experiences | Semiconductor Manufacturing | 🇺🇸 San Jose | 2,179 | 1986 |
| 28 | [Altera](https://www.tamtam.ai/c/altera) (altera.com)<br>The company specializes in flexible, reprogrammable semiconductors to enable innovation and unlock extraordinary capabilities worldwide | Semiconductor Manufacturing | 🇺🇸 San Jose | 2,101 | 1983 |
| 29 | [SST](https://www.tamtam.ai/c/sst) (sst.com)<br>Leading provider embedded flash, OTP technology. Develops, designs, licenses, markets SuperFlash, SMARTBIT memory solutions consumer, industrial, automotive markets. Founded 1989. | Semiconductor Manufacturing | 🇺🇸 San Jose | 2,067 | 1989 |
| 30 | [Polycom](https://www.tamtam.ai/c/polycom) (hp.com)<br>Poly offers a range of smart communication endpoints, cloud software, and services to facilitate authentic human connection and collaboration | Telecommunications | 🇺🇸 San Jose | 2,008 | 1990 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.

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Source: https://www.tamtam.ai/l/r-and-d-companies-san-jose