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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 95,899 | ||||
| 2 | 42,354 | ||||
| 3 |
PayPalpaypal.com
Enables fast, easy, enjoyable money movement for individuals and businesses globally, unlocking opportunities and empowering everyday financial interactions for millions. |
38,343 | |||
| 4 | 27,000 | ||||
| 5 |
Sanminasanmina.com
A leading integrated manufacturing solutions provider offering end-to-end services to OEMs in various industries worldwide |
22,931 | |||
| 6 |
WDwesterndigital.com
This company creates innovative data storage solutions for current technology and future advancements |
22,696 | |||
| 7 |
Broadcom Softwarebroadcom.com
Global software leader optimizing and protecting complex hybrid environments for multinational companies with industry-leading business-critical software, enabling scalability, agility, and security |
17,981 | |||
| 8 |
Symantecbroadcom.com
It offers comprehensive cybersecurity solutions for Endpoint, Network, Data, and Cloud security, catering to both individuals and enterprises. |
12,852 | |||
| 9 |
NetAppnetapp.com
It builds intelligent data infrastructure, enabling applications to utilize any data from anywhere, enhancing data management and accessibility. |
12,680 | |||
| 10 |
Cadencecadence.com
Development of software, hardware, and IP enabling innovative electronic product design across diverse markets like 5G, automotive, aerospace, and healthcare. |
11,424 | |||
| 11 |
Nutanixnutanix.com
Global leader in cloud software, providing a platform for running apps and data across clouds, simplifying operations for businesses worldwide |
9,917 | |||
| 12 |
Logitechlogitech.com
Innovative hardware and software solutions bringing people together in work, creation, gaming, and streaming, with a focus on sustainability |
9,325 | |||
| 13 |
Zscalerzscaler.com
Leading organization enabling secure network and application transformation for mobile and cloud-first world, offering fast, secure, cloud-delivered services globally for enhanced cybersecurity |
8,865 | |||
| 14 |
Supermicrosupermicro.com
A global technology leader providing innovative solutions for Enterprise, Cloud, AI, 5G Telco/Edge IT Infrastructure, including servers, storage, IoT, switches, and related services |
5,562 | |||
| 15 |
Maxim Integratedanalog.com
Semiconductor company specializing in analog and mixed-signal integrated circuits, now part of Analog Devices corporation. |
5,410 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
HPE Aruba Networkinghpe.com
Design and delivery of Mobility-Defined Networks enabling advanced connectivity and empowerment for tech-savvy users in modern environments. |
4,903 | |||
| 17 |
Automation Anywhereautomationanywhere.com
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. |
4,542 | |||
| 18 |
Rokuweareroku.com
A leading streaming TV platform offering Roku-branded hardware, smart home systems, and original content, reaching millions of households worldwide Join us at wearerokucom |
4,386 | |||
| 19 |
HGST, a Western Digital brandwesterndigital.com
A global leader in data storage solutions focused on driving data center transformation with innovative, efficient, and reliable technology for various industries |
4,046 | |||
| 20 |
eInfochips (An Arrow Company)einfochips.com
A global provider of product engineering, semiconductor design, and IoT solutions across various cloud platforms with a focus on innovation and client success |
4,006 | |||
| 21 |
Lumentumlumentum.com
A leading designer and manufacturer of optical and photonic products for optical networking, laser applications, telecom, enterprise, data centers, and advanced manufacturing worldwide |
3,690 | |||
| 22 | 3,402 | ||||
| 23 |
Cypress Semiconductor Corporationinfineon.com
Closing in April, a company will merge with Infineon Join their community for updates and news on their services |
2,581 | |||
| 24 | 2,533 | ||||
| 25 |
Bloom Energybloomenergy.com
Bloom Energy provides sustainable and reliable distributed energy solutions to businesses worldwide, helping them lower costs, reduce emissions, and increase energy independence |
2,269 | |||
| 26 |
TAIYO YUDENyuden.co.jp
A global technology company specializing in capacitors, inductors, circuit products, SAW/FBAR devices, and energy devices for various industries since 1950 |
2,185 | |||
| 27 |
Synaptics Incorporatedsynaptics.com
This company is revolutionizing human interactions with technology by providing innovative solutions for home, work, car, and on-the-go experiences |
2,179 | |||
| 28 |
Alteraaltera.com
The company specializes in flexible, reprogrammable semiconductors to enable innovation and unlock extraordinary capabilities worldwide |
2,101 | |||
| 29 | 2,067 | ||||
| 30 | 2,008 | ||||
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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.
More company lists in San Jose
- The largest companies in San Jose 561
- Multinational companies in San Jose 180
- SaaS companies in San Jose 88
- IT Services and IT Consulting companies in San Jose 87
- AI companies in San Jose 84
- Hardware manufacturers in San Jose 83
- Software Development companies in San Jose 75
- IT services companies in San Jose 75
- Electronics and semiconductor companies in San Jose 58
- Manufacturers in San Jose 57
- Professional services firms in San Jose 47
- Publicly traded companies in San Jose 38
- Consulting firms in San Jose 37
- Subscription businesses in San Jose 37
- Semiconductor Manufacturing companies in San Jose 34
- AI-native companies in San Jose 29
- Technology, Information and Internet companies in San Jose 26
The same list elsewhere in United States
- Companies with in-house R&D in the United States 6,796
- Companies with in-house R&D in California 1,276
- Companies with in-house R&D in Texas 442
- Companies with in-house R&D in New York State 419
- Companies with in-house R&D in Massachusetts 396
- Companies with in-house R&D in Illinois 322
- Companies with in-house R&D in Michigan 287
- Companies with in-house R&D in Ohio 277
- Companies with in-house R&D in Pennsylvania 255
- Companies with in-house R&D in New Jersey 224
- Companies with in-house R&D in Florida 221
- Companies with in-house R&D in Alabama 214
- Companies with in-house R&D in Georgia 173
- Companies with in-house R&D in Virginia 166
- Companies with in-house R&D in North Carolina 158
- Companies with in-house R&D in Wisconsin 154
- Companies with in-house R&D in Minnesota 146
- Companies with in-house R&D in Washington State 140
- Companies with in-house R&D in Colorado 113
- Companies with in-house R&D in Maryland 107
- Companies with in-house R&D in Indiana 104
- Companies with in-house R&D in New York 223
- Companies with in-house R&D in San Francisco 147
- Companies with in-house R&D in Houston 129