This selection of large managed service providers in California includes major software development companies, IT services firms, and hardware manufacturers. Among them are Google, providing search and web services; NVIDIA, known for its GPUs and AI development; Databricks, offering a Data Intelligence Platform; and Equinix, a global digital infrastructure company. These companies primarily serve businesses by enhancing data management, cloud capabilities, and digital infrastructure.
A notable pattern is the concentration of headquarters in Silicon Valley cities, with multiple companies based in Santa Clara, San Jose, San Francisco, and Palo Alto. Most of these firms are well-established, with several founded in the 1990s, such as NVIDIA (1993), NetApp (1992), and Equinix (1998), indicating a mature and long-standing presence in the technology sector.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Googlegoogle.com
Provides a powerful search engine, web services, and advertising tools to help users find information and businesses reach customers |
304,428 | |||
| 2 |
NVIDIAnvidia.com
A pioneering company in accelerated computing, known for inventing the GPU, shaping PC gaming, computer graphics, AI development, and creating the metaverse |
48,336 | |||
| 3 |
Databricksdatabricks.com
It provides a Data Intelligence Platform for organizations to manage their data effectively and leverage AI for better decision-making. |
15,896 | |||
| 4 |
Equinixequinix.com
A global digital infrastructure company empowering businesses to access foundational infrastructure, partners, and possibilities to accelerate advantage and multiply value |
14,710 | |||
| 5 |
NetAppnetapp.com
It builds intelligent data infrastructure, enabling applications to utilize any data from anywhere, enhancing data management and accessibility. |
12,680 | |||
| 6 |
VMwarebroadcom.com
Leading provider of multi-cloud services enabling digital innovation with enterprise control Cultivating innovation to solve customer challenges with disruptive technologies |
11,230 | |||
| 7 |
Hitachi Vantarahitachivantara.com
Provides data management and analytics solutions enabling businesses to innovate and leverage data as a strategic asset for growth. |
10,529 | |||
| 8 |
Nutanixnutanix.com
Global leader in cloud software, providing a platform for running apps and data across clouds, simplifying operations for businesses worldwide |
9,917 | |||
| 9 |
Cloudflarecloudflare.com
The company is a leading connectivity cloud provider, empowering organizations to enhance speed and security while reducing complexity and cost |
7,489 | |||
| 10 |
Twiliotwilio.com
Platform enabling companies to build personalized customer relationships using communications and data across sales, marketing, service, and growth worldwide. |
6,921 | |||
| 11 |
Pure Storageeverpuredata.com
Provides secure, real-time data storage solutions for SaaS, cloud providers, enterprises, enabling AI, machine learning, and multi-cloud environments. |
5,239 | |||
| 12 |
Impetusimpetus.com
Specializing in data, AI, and cloud solutions, the company offers data platform engineering, DevOps, AI/ML, and application modernization services for Fortune 500 enterprises |
4,735 | |||
| 13 |
Milestone Technologies, Inc.milestone.tech
A global IT services and digital solutions company in Silicon Valley, specializing in application services, digital product engineering, and workplace services |
3,008 | |||
| 14 |
Hewlett Packardhpe.com
An American multinational IT company offering hardware components, software, and services to consumers, SMBs, large enterprises, government, health, and education sectors Founded in 1939 |
2,526 | |||
| 15 |
Astreyaastreya.com
Innovative IT solutions provider with global reach, enabling businesses to make better decisions, improve efficiency, and gain a competitive edge |
2,520 | |||
| 16 |
LNT Infotechlntinfotech.com
A global IT solutions & services company, part of Larsen & Toubro, helping clients succeed in digital transformation through technology consulting and digital solutions |
2,230 | |||
| 17 |
NICnicitpartner.com
A leading provider of IT solutions, cybersecurity, and cloud services for businesses and organizations, with a focus on customer service and adapting to client needs |
1,923 | |||
| 18 | 1,544 | ||||
| 19 |
Trace3trace3.com
Consulting on, integrating, and operating data, security, and cloud solutions to drive business transformation and create measurable value for clients |
1,440 | |||
| 20 |
OSI Digitalosidigital.com
A global provider of business and technology solutions, specializing in digital transformation, data optimization, and system integration for a wide range of industries |
1,436 | |||
| 21 |
Fastlyfastly.com
Enhance websites and applications by leveraging Fastly's edge cloud platform, catering to popular brands like Reddit, Pinterest, and Stripe |
1,415 | |||
| 22 |
Intermedia Intelligent Communicationsintermedia.com
Cloud communications company providing integrated solutions for voice, video, chat, contact center, email, security, and more, with a focus on exceptional customer service and partner support |
1,381 | |||
| 23 | 1,372 | ||||
| 24 |
Nilenilesecure.com
Pioneer and leader in Secure Networking-as-a-Service, delivering zero-trust, autonomous operations and cloud solutions for radical operational simplicity, security, speed, and stellar user experiences. |
1,355 | |||
| 25 |
Egnyteegnyte.com
Leader in Cloud Content Governance for 24,000+ businesses worldwide, providing smart collaboration and governance solutions for content in the cloud or on-premises |
1,292 | |||
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. | |||||
| 26 |
Fujitsu Americasfujitsu.com
Leading provider of IT services and solutions globally, specializing in consulting, systems integration, managed services, cloud services, and server technologies, with a focus on sustainability and innovation |
1,173 | |||
| 27 |
PCM: The Right Technology, Delivered.insight.com
A leading IT provider offering hardware, software, services, and consulting to help businesses run smarter and navigate complex IT challenges |
1,158 | |||
| 28 |
Synopteksynoptek.com
Global IT services provider specializing in systems integration and managed services for organizations of all sizes, focusing on maximizing business value and delivering exceptional results |
1,133 | |||
| 29 |
Equinix EMEAequinix.co.uk
Enabling digital leaders to access and interconnect essential infrastructure, scale with agility, accelerate digital services, and deliver world-class experiences |
1,124 | |||
| 30 |
Crest Datacrestdata.ai
A leading provider of custom solutions in Data Analytics, Cyber Security, ITOps/AIOps, DevOps, and Cloud, serving Fortune 500 companies and Silicon Valley startups |
1,032 | |||
| 31 |
Vercelvercel.com
A platform for frontend developers specializing in building, scaling, and securing personalized websites quickly, with customers including Under Armour and Nintendo |
960 | |||
| 32 |
Cerebrascerebras.ai
Accelerating deep learning through cutting-edge technology, including the fastest AI computer with a revolutionary chip for faster neural network training Join our team! |
930 | |||
| 33 |
Caylentcaylent.com
Cloud native services provider helping organizations optimize people and technology with AWS, enabling innovation and ambitious ideas to thrive |
899 | |||
| 34 | 765 | ||||
| 35 |
Anyscaleanyscale.com
Facilitating scalable AI and Python computing solutions for developers of all levels to create applications running efficiently across various platforms |
760 | |||
| 36 | 
Computacenter UScomputacenter.com
Leading independent technology partner enabling digital transformation for large organizations through sourcing, transforming, and managing IT infrastructure with a focus on building long-term trust with customers |
734 | |||
| 37 | 712 | ||||
| 38 |
Google Cloud Securitycloud.google.com
Provides comprehensive cybersecurity solutions to organizations, addressing security challenges with AI-powered capabilities, Mandiant intelligence, and a secure cloud foundation. |
682 | |||
| 39 |
TelePacific Communications (TPx Communications)tpx.com
TelePacific company is now TPx Communications, providing news and updates on their services Visit their LinkedIn page for more information |
616 | |||
| 40 |
Tuya Smarttuya.com
A leading technology company offering a cloud platform connecting IoT devices, empowering partners with intelligent solutions for smart devices in various industries |
614 | |||
| 41 |
Mirantismirantis.com
delivers full-stack AI infrastructure technology, reducing GPU infrastructure complexity and streamlining operations across the AI lifecycle, from Metal-to-Model, across any environment |
605 | |||
| 42 |
Replitreplit.com
The company enables remote collaboration to develop software efficiently across different devices without the need for setup |
595 | |||
| 43 |
ISSQUARED, Inc.issquaredinc.com
A global provider of digital transformation solutions in cybersecurity, cloud infrastructure, and managed services, with certifications in global standards and industry accolades |
581 | |||
| 44 |
ClickHouseclickhouse.com
An open-source, column-oriented OLAP database system enabling real-time analytical reports with lightning-fast speed and high data processing capacity, praised for reliability and ease of use |
576 | |||
| 45 |
Equinix Asia-Pacificequinix.hk
A global digital infrastructure company that enables businesses to connect and scale with agility, access partners, launch services, and deliver world-class experiences |
574 | |||
| 46 |
Aryakaaryaka.com
Pioneering leader in cloud-first, software-defined networking and security solutions, offering Unified SASE as a Service for global businesses. |
555 | |||
| 47 | 554 | ||||
| 48 |
DFT (DuPont Fabros Technology)digitalrealty.com
Specializing in data center solutions, the company merged with Dupont Fabros Technology in 2017, providing growth without limits Stay updated for further details |
537 | |||
| 49 |
CallTekcalltekinc.com
Provides secure, compliant, and reliable white-label technical support, including engineering, software development, field service, and customer support to technology operators worldwide. |
537 | |||
| 50 |
Sycompsycomp.com
A leading global provider of innovative IT solutions, specializing in delivering superior business results through customized e-business solutions for companies of all sizes |
520 | |||
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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 California
- The largest companies in California 15,265
- Multinational companies in California 2,592
- SaaS companies in California 1,855
- Software Development companies in California 1,650
- AI companies in California 1,297
- Companies with in-house R&D in California 1,276
- Manufacturers in California 1,066
- Hardware manufacturers in California 985
- IT Services and IT Consulting companies in California 968
- Education providers in California 950
- Subscription businesses in California 940
- Venture capital and private equity firms in California 917
- Professional services firms in California 880
- Companies with a mobile app in California 827
- Retail chains in California 803
- IT services companies in California 796
- Venture Capital and Private Equity Principals companies in California 731
- Financial services firms in California 711
- Financial Services companies in California 642
- Healthcare providers in California 569
- AI-native companies in California 561
- Hospitals and Health Care companies in California 555
- Consulting firms in California 551
- Public sector organisations in California 535
The same list elsewhere in United States
- Managed service providers in the United States 889
- Managed service providers in Texas 83
- Managed service providers in New York State 78
- Managed service providers in Florida 71
- Managed service providers in Georgia 42
- Managed service providers in New Jersey 36
- Managed service providers in Illinois 35
- Managed service providers in Virginia 35
- Managed service providers in Washington State 35
- Managed service providers in Colorado 31
- Managed service providers in Massachusetts 26
- Managed service providers in Pennsylvania 26
- Managed service providers in New York 54
- Managed service providers in San Francisco 25