# Top 50 managed service providers in California

Tamtam tracks 152 managed service providers headquartered in California. This list ranks the 50 largest by number of employees on LinkedIn, led by Google, NVIDIA and Databricks. Their median headcount is 1,292. Half of them were founded in 2008 or later. The most common headquarters are San Francisco (9), Santa Clara (7) and San Jose (6).

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.

🇺🇸 California · 50 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Google](https://www.tamtam.ai/c/google) (google.com)<br>Provides a powerful search engine, web services, and advertising tools to help users find information and businesses reach customers | Software Development | 🇺🇸 Mountain View | 304,428 |  |
| 2 | [NVIDIA](https://www.tamtam.ai/c/nvidia) (nvidia.com)<br>A pioneering company in accelerated computing, known for inventing the GPU, shaping PC gaming, computer graphics, AI development, and creating the metaverse | Computer Hardware Manufacturing | 🇺🇸 Santa Clara | 48,336 | 1993 |
| 3 | [Databricks](https://www.tamtam.ai/c/databricks) (databricks.com)<br>It provides a Data Intelligence Platform for organizations to manage their data effectively and leverage AI for better decision-making. | Software Development | 🇺🇸 San Francisco | 15,896 |  |
| 4 | [Equinix](https://www.tamtam.ai/c/equinix) (equinix.com)<br>A global digital infrastructure company empowering businesses to access foundational infrastructure, partners, and possibilities to accelerate advantage and multiply value | IT Services and IT Consulting | 🇺🇸 Redwood City | 14,710 | 1998 |
| 5 | [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 |
| 6 | [VMware](https://www.tamtam.ai/c/vmware) (broadcom.com)<br>Leading provider of multi-cloud services enabling digital innovation with enterprise control Cultivating innovation to solve customer challenges with disruptive technologies | Software Development | 🇺🇸 Palo Alto | 11,230 |  |
| 7 | [Hitachi Vantara](https://www.tamtam.ai/c/hitachi-vantara) (hitachivantara.com)<br>Provides data management and analytics solutions enabling businesses to innovate and leverage data as a strategic asset for growth. | Data Infrastructure and Analytics | 🇺🇸 Santa Clara | 10,529 |  |
| 8 | [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 |  |
| 9 | [Cloudflare](https://www.tamtam.ai/c/cloudflare) (cloudflare.com)<br>The company is a leading connectivity cloud provider, empowering organizations to enhance speed and security while reducing complexity and cost | Computer and Network Security | 🇺🇸 San Francisco | 7,489 | 2009 |
| 10 | [Twilio](https://www.tamtam.ai/c/twilio) (twilio.com)<br>Platform enabling companies to build personalized customer relationships using communications and data across sales, marketing, service, and growth worldwide. | Software Development | 🇺🇸 San Francisco | 6,921 | 2008 |
| 11 | [Pure Storage](https://www.tamtam.ai/c/pure-storage) (everpuredata.com)<br>Provides secure, real-time data storage solutions for SaaS, cloud providers, enterprises, enabling AI, machine learning, and multi-cloud environments. | IT Services and IT Consulting | 🇺🇸 Santa Clara | 5,239 | 2009 |
| 12 | [Impetus](https://www.tamtam.ai/c/impetus) (impetus.com)<br>Specializing in data, AI, and cloud solutions, the company offers data platform engineering, DevOps, AI/ML, and application modernization services for Fortune 500 enterprises | IT Services and IT Consulting | 🇺🇸 Los Gatos | 4,735 | 1996 |
| 13 | [Milestone Technologies, Inc.](https://www.tamtam.ai/c/milestone-technologies-inc) (milestone.tech)<br>A global IT services and digital solutions company in Silicon Valley, specializing in application services, digital product engineering, and workplace services | IT Services and IT Consulting | 🇺🇸 Fremont | 3,008 | 1997 |
| 14 | [Hewlett Packard](https://www.tamtam.ai/c/hewlett-packard) (hpe.com)<br>An American multinational IT company offering hardware components, software, and services to consumers, SMBs, large enterprises, government, health, and education sectors Founded in 1939 | IT Services and IT Consulting | 🇺🇸 Palo Alto | 2,526 |  |
| 15 | [Astreya](https://www.tamtam.ai/c/astreya) (astreya.com)<br>Innovative IT solutions provider with global reach, enabling businesses to make better decisions, improve efficiency, and gain a competitive edge | IT Services and IT Consulting | 🇺🇸 San Jose | 2,520 | 2001 |
| 16 | [LNT Infotech](https://www.tamtam.ai/c/lnt-infotech) (lntinfotech.com)<br>A global IT solutions & services company, part of Larsen & Toubro, helping clients succeed in digital transformation through technology consulting and digital solutions | IT Services and IT Consulting | 🇺🇸 Santa Clara | 2,230 | 1947 |
| 17 | [NIC](https://www.tamtam.ai/c/nic) (nicitpartner.com)<br>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 | IT Services and IT Consulting | 🇺🇸 Los Angeles | 1,923 | 2002 |
| 18 | [Redis](https://www.tamtam.ai/c/redis) (redis.io)<br>Provides cloud and on-prem solutions for caching and vector search to help digital customers build, scale, and deploy fast applications globally. | Software Development | 🇺🇸 Mountain View | 1,544 | 2011 |
| 19 | [Trace3](https://www.tamtam.ai/c/trace3) (trace3.com)<br>Consulting on, integrating, and operating data, security, and cloud solutions to drive business transformation and create measurable value for clients | IT Services and IT Consulting | 🇺🇸 Irvine | 1,440 | 2002 |
| 20 | [OSI Digital](https://www.tamtam.ai/c/osi-digital) (osidigital.com)<br>A global provider of business and technology solutions, specializing in digital transformation, data optimization, and system integration for a wide range of industries | IT Services and IT Consulting | 🇺🇸 Calabasas | 1,436 | 1993 |
| 21 | [Fastly](https://www.tamtam.ai/c/fastly) (fastly.com)<br>Enhance websites and applications by leveraging Fastly's edge cloud platform, catering to popular brands like Reddit, Pinterest, and Stripe | Software Development | 🇺🇸 San Francisco | 1,415 | 2011 |
| 22 | [Intermedia Intelligent Communications](https://www.tamtam.ai/c/intermedia-intelligent-communications) (intermedia.com)<br>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 | IT Services and IT Consulting | 🇺🇸 Sunnyvale | 1,381 | 1993 |
| 23 | [Druva](https://www.tamtam.ai/c/druva) (druva.com)<br>Leading provider of data security solutions, empowering customers to secure and recover their data from all threats with a fully managed SaaS platform. | Software Development | 🇺🇸 Santa Clara | 1,372 | 2008 |
| 24 | [Nile](https://www.tamtam.ai/c/nile-san-jose) (nilesecure.com)<br>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. | Computer and Network Security | 🇺🇸 San Jose | 1,355 | 2018 |
| 25 | [Egnyte](https://www.tamtam.ai/c/egnyte) (egnyte.com)<br>Leader in Cloud Content Governance for 24,000+ businesses worldwide, providing smart collaboration and governance solutions for content in the cloud or on-premises | Software Development | 🇺🇸 Mountain View | 1,292 | 2008 |
| 26 | [Fujitsu Americas](https://www.tamtam.ai/c/fujitsu-americas) (fujitsu.com)<br>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 | IT Services and IT Consulting | 🇺🇸 Sunnyvale | 1,173 | 1935 |
| 27 | [PCM: The Right Technology, Delivered.](https://www.tamtam.ai/c/pcm-the-right-technology-delivered) (insight.com)<br>A leading IT provider offering hardware, software, services, and consulting to help businesses run smarter and navigate complex IT challenges | IT Services and IT Consulting | 🇺🇸 El Segundo | 1,158 | 1987 |
| 28 | [Synoptek](https://www.tamtam.ai/c/synoptek) (synoptek.com)<br>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 | IT Services and IT Consulting | 🇺🇸 Costa Mesa | 1,133 | 2001 |
| 29 | [Equinix EMEA](https://www.tamtam.ai/c/equinix-emea) (equinix.co.uk)<br>Enabling digital leaders to access and interconnect essential infrastructure, scale with agility, accelerate digital services, and deliver world-class experiences | Internet Publishing | 🇺🇸 Redwood City | 1,124 | 1998 |
| 30 | [Crest Data](https://www.tamtam.ai/c/crest-data) (crestdata.ai)<br>A leading provider of custom solutions in Data Analytics, Cyber Security, ITOps/AIOps, DevOps, and Cloud, serving Fortune 500 companies and Silicon Valley startups | Technology, Information and Internet | 🇺🇸 San Jose | 1,032 | 2013 |
| 31 | [Vercel](https://www.tamtam.ai/c/vercel) (vercel.com)<br>A platform for frontend developers specializing in building, scaling, and securing personalized websites quickly, with customers including Under Armour and Nintendo | Software Development | 🇺🇸 San Francisco | 960 | 2015 |
| 32 | [Cerebras](https://www.tamtam.ai/c/cerebras) (cerebras.ai)<br>Accelerating deep learning through cutting-edge technology, including the fastest AI computer with a revolutionary chip for faster neural network training Join our team! | Semiconductor Manufacturing | 🇺🇸 Sunnyvale | 930 | 2015 |
| 33 | [Caylent](https://www.tamtam.ai/c/caylent) (caylent.com)<br>Cloud native services provider helping organizations optimize people and technology with AWS, enabling innovation and ambitious ideas to thrive | IT Services and IT Consulting | 🇺🇸 Irvine | 899 | 2015 |
| 34 | [Lambda](https://www.tamtam.ai/c/lambda) (lambda.ai)<br>A team of Deep Learning engineers building a powerful GPU cloud, clusters, servers, and workstations for accelerating human progress and knowledge | Software Development | 🇺🇸 San Francisco | 765 | 2012 |
| 35 | [Anyscale](https://www.tamtam.ai/c/anyscale) (anyscale.com)<br>Facilitating scalable AI and Python computing solutions for developers of all levels to create applications running efficiently across various platforms | Software Development | 🇺🇸 San Francisco | 760 | 2019 |
| 36 | [Computacenter US](https://www.tamtam.ai/c/computacenter-us) (computacenter.com)<br>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 | IT Services and IT Consulting | 🇺🇸 San Francisco | 734 | 1981 |
| 37 | [DoiT](https://www.tamtam.ai/c/doit) (doit.com)<br>Provide tools and expertise for multicloud cost management, procurement, optimization, and FinOps to support business growth and innovation. | Technology, Information and Internet | 🇺🇸 Santa Clara | 712 | 2011 |
| 38 | [Google Cloud Security](https://www.tamtam.ai/c/google-cloud-security) (cloud.google.com)<br>Provides comprehensive cybersecurity solutions to organizations, addressing security challenges with AI-powered capabilities, Mandiant intelligence, and a secure cloud foundation. | Computer and Network Security | 🇺🇸 Mountain View | 682 | 2018 |
| 39 | [TelePacific Communications (TPx Communications)](https://www.tamtam.ai/c/telepacific-communications-tpx-communications) (tpx.com)<br>TelePacific company is now TPx Communications, providing news and updates on their services Visit their LinkedIn page for more information | Telecommunications | 🇺🇸 Los Angeles | 616 | 1998 |
| 40 | [Tuya Smart](https://www.tamtam.ai/c/tuya-smart) (tuya.com)<br>A leading technology company offering a cloud platform connecting IoT devices, empowering partners with intelligent solutions for smart devices in various industries | Technology, Information and Internet | 🇺🇸 San Jose | 614 | 2014 |
| 41 | [Mirantis](https://www.tamtam.ai/c/mirantis) (mirantis.com)<br>delivers full-stack AI infrastructure technology, reducing GPU infrastructure complexity and streamlining operations across the AI lifecycle, from Metal-to-Model, across any environment | Software Development | 🇺🇸 Campbell | 605 | 1999 |
| 42 | [Replit](https://www.tamtam.ai/c/replit) (replit.com)<br>The company enables remote collaboration to develop software efficiently across different devices without the need for setup | Software Development | 🇺🇸 Foster City | 595 | 2016 |
| 43 | [ISSQUARED, Inc.](https://www.tamtam.ai/c/issquared-inc) (issquaredinc.com)<br>A global provider of digital transformation solutions in cybersecurity, cloud infrastructure, and managed services, with certifications in global standards and industry accolades | IT Services and IT Consulting | 🇺🇸 Westlake Village | 581 | 2010 |
| 44 | [ClickHouse](https://www.tamtam.ai/c/clickhouse) (clickhouse.com)<br>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 | Software Development | 🇺🇸 Palo Alto | 576 | 2021 |
| 45 | [Equinix Asia-Pacific](https://www.tamtam.ai/c/equinix-asia-pacific) (equinix.hk)<br>A global digital infrastructure company that enables businesses to connect and scale with agility, access partners, launch services, and deliver world-class experiences | Technology, Information and Internet | 🇺🇸 Redwood City | 574 | 1998 |
| 46 | [Aryaka](https://www.tamtam.ai/c/aryaka) (aryaka.com)<br>Pioneering leader in cloud-first, software-defined networking and security solutions, offering Unified SASE as a Service for global businesses. | Computer and Network Security | 🇺🇸 Santa Clara | 555 | 2009 |
| 47 | [WEKA](https://www.tamtam.ai/c/weka) (weka.io)<br>Specializing in AI and performance-heavy workloads, this data platform transforms data silos into dynamic pipelines for cloud-based storage and on-premises performance | Software Development | 🇺🇸 Campbell | 554 | 2013 |
| 48 | [DFT (DuPont Fabros Technology)](https://www.tamtam.ai/c/dft-dupont-fabros-technology) (digitalrealty.com)<br>Specializing in data center solutions, the company merged with Dupont Fabros Technology in 2017, providing growth without limits Stay updated for further details | Real Estate | 🇺🇸 San Francisco | 537 | 1997 |
| 49 | [CallTek](https://www.tamtam.ai/c/calltek) (calltekinc.com)<br>Provides secure, compliant, and reliable white-label technical support, including engineering, software development, field service, and customer support to technology operators worldwide. | IT Services and IT Consulting | 🇺🇸 Irvine | 537 | 2004 |
| 50 | [Sycomp](https://www.tamtam.ai/c/sycomp) (sycomp.com)<br>A leading global provider of innovative IT solutions, specializing in delivering superior business results through customized e-business solutions for companies of all sizes | IT Services and IT Consulting | 🇺🇸 Burlingame | 520 | 1994 |

## 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](https://www.tamtam.ai/l/largest-companies-california) (15,265)
- [Multinational companies in California](https://www.tamtam.ai/l/multinational-companies-california) (2,592)
- [SaaS companies in California](https://www.tamtam.ai/l/saas-companies-california) (1,855)
- [Software Development companies in California](https://www.tamtam.ai/l/software-development-companies-california) (1,650)
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- [Hardware manufacturers in California](https://www.tamtam.ai/l/hardware-companies-california) (985)
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- [Subscription businesses in California](https://www.tamtam.ai/l/subscription-businesses-california) (940)
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- [Professional services firms in California](https://www.tamtam.ai/l/professional-services-firms-california) (880)
- [Companies with a mobile app in California](https://www.tamtam.ai/l/companies-with-mobile-app-california) (827)
- [Retail chains in California](https://www.tamtam.ai/l/retail-chains-california) (803)
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## The same list elsewhere in United States

- [Managed service providers in the United States](https://www.tamtam.ai/l/managed-service-providers-united-states) (889)
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- [Managed service providers in Washington State](https://www.tamtam.ai/l/managed-service-providers-washington-state) (35)
- [Managed service providers in Colorado](https://www.tamtam.ai/l/managed-service-providers-colorado) (31)
- [Managed service providers in Massachusetts](https://www.tamtam.ai/l/managed-service-providers-massachusetts) (26)
- [Managed service providers in Pennsylvania](https://www.tamtam.ai/l/managed-service-providers-pennsylvania) (26)
- [Managed service providers in New York](https://www.tamtam.ai/l/managed-service-providers-new-york) (54)
- [Managed service providers in San Francisco](https://www.tamtam.ai/l/managed-service-providers-san-francisco) (25)

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Source: https://www.tamtam.ai/l/managed-service-providers-california