# Top 100 managed service providers in the United States

Tamtam tracks 889 managed service providers headquartered in the United States. This list ranks the 100 largest by number of employees on LinkedIn, led by Amazon, IBM and Google. Their median headcount is 3,965. Half of them were founded in 1998 or later. The most common headquarters are New York (7), Austin (4) and San Francisco (4).

These managed service providers in the United States primarily consist of large technology corporations specializing in software development and IT services. Companies like Amazon, Google, and Microsoft are prominent in software, while IBM, Oracle, and Amazon Web Services (AWS) focus on IT consulting and cloud infrastructure. Other significant players include DXC Technology, which modernizes IT systems, and Kyndryl, a global leader in managing advanced technology infrastructure.NVIDIA stands out in computer hardware manufacturing, particularly for GPUs and AI development. A notable pattern is the concentration of headquarters in tech hubs such as Seattle, Mountain View, and Redmond, indicating a strong presence of established technology giants across the country.

🇺🇸 United States · 100 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Amazon](https://www.tamtam.ai/c/amazon) (amazon.com)<br>An e-commerce giant offering a vast selection of products, convenient shopping experiences, and fast delivery, connecting buyers with a wide range of sellers | Software Development | 🇺🇸 Seattle | 1,541,000 |  |
| 2 | [IBM](https://www.tamtam.ai/c/ibm) (ibm.com)<br>It focuses on collaboration among technologists, developers, and engineers to improve technology, infrastructure, software, and consulting for better solutions. | IT Services and IT Consulting | 🇺🇸 Armonk | 335,625 |  |
| 3 | [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 |  |
| 4 | [Microsoft](https://www.tamtam.ai/c/microsoft) (microsoft.com)<br>Develops and sells software, hardware, and cloud services, including the Windows operating system and Office suite, to improve productivity and digital experiences | Software Development | 🇺🇸 Redmond | 233,562 |  |
| 5 | [Oracle](https://www.tamtam.ai/c/oracle) (oracle.com)<br>Delivers cloud infrastructure, data, and applications for AI, offering scalable solutions for various deployments, integrating AI into databases, data platforms, and business applications. | IT Services and IT Consulting | 🇺🇸 Austin | 206,235 | 1977 |
| 6 | [Amazon Web Services (AWS)](https://www.tamtam.ai/c/amazon-web-services-aws) (amazon.com)<br>A global cloud computing provider offering scalable, reliable, and cost-effective infrastructure services to businesses worldwide, eliminating the need for capital infrastructure expenses | IT Services and IT Consulting | 🇺🇸 Seattle | 147,090 | 2006 |
| 7 | [DXC Technology](https://www.tamtam.ai/c/dxc-technology) (dxc.com)<br>It assists global companies in managing critical systems, modernizing IT, optimizing data, and ensuring security across various cloud environments. | IT Services and IT Consulting | 🇺🇸 Ashburn | 90,597 | 2017 |
| 8 | [Hewlett Packard Enterprise](https://www.tamtam.ai/c/hewlett-packard-enterprise) (hpe.com)<br>This company is a global edge-to-cloud company that drives technology and innovation to fulfill its passion and purpose | IT Services and IT Consulting | 🇺🇸 Houston | 90,021 |  |
| 9 | [Kyndryl](https://www.tamtam.ai/c/kyndryl) (kyndryl.com)<br>A global leader in designing, running, and managing advanced technology infrastructure, focusing on excellence, innovation, and advancing vital systems for human progress | IT Services and IT Consulting | 🇺🇸 New York | 90,000 | 2021 |
| 10 | [Lumen Technologies](https://www.tamtam.ai/c/lumen-technologies) (lumen.com)<br>The company provides digital connectivity solutions, utilizing their network strength to connect people, data, and applications quickly, securely, and effortlessly | Technology, Information and Internet | 🇺🇸 Monroe | 49,357 |  |
| 11 | [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 |
| 12 | [NTT DATA North America](https://www.tamtam.ai/c/ntt-data-north-america) (us.nttdata.com)<br>provides business and technology consulting, data and AI solutions, application development, infrastructure management, and industry-specific services globally | IT Services and IT Consulting | 🇺🇸 Plano | 24,414 |  |
| 13 | [Iron Mountain](https://www.tamtam.ai/c/iron-mountain) (ironmountain.com)<br>Global leader in storage and information management services, partnering with organizations worldwide to protect and unlock the value of their assets and data | IT Services and IT Consulting | 🇺🇸 Boston | 24,357 |  |
| 14 | [Unisys](https://www.tamtam.ai/c/unisys) (unisys.com)<br>A global technology solutions company offering digital workplace, cloud, applications & infrastructure, enterprise computing, and business process solutions to empower organizations | IT Services and IT Consulting | 🇺🇸 Blue Bell | 23,358 |  |
| 15 | [Red Hat](https://www.tamtam.ai/c/red-hat) (redhat.com)<br>A global leader in enterprise open source solutions, delivering high-performing Linux, hybrid cloud, edge, and Kubernetes technologies through community collaboration Join us and make an impact | Software Development | 🇺🇸 Raleigh | 21,000 | 1993 |
| 16 | [Wipro Technologies](https://www.tamtam.ai/c/wipro-technologies-new-orleans) (wipro.com)<br>Management consulting company located in New Orleans, providing services to help businesses improve operations and achieve their goals | Business Consulting and Services | 🇺🇸 New Orleans | 16,942 |  |
| 17 | [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 |  |
| 18 | [Infinite Computer Solutions](https://www.tamtam.ai/c/infinite-computer-solutions) (infinite.com)<br>Global provider of technology modernization, digital engineering, and AI-driven IT services delivering tailored solutions across multiple industries worldwide. | IT Services and IT Consulting | 🇺🇸 Rockville | 14,901 | 2001 |
| 19 | [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 |
| 20 | [Apex Systems](https://www.tamtam.ai/c/apex-systems) (apexsystems.com)<br>Specializes in strategy, transformation, managed services including application development, data, cloud, cybersecurity, and AI solutions across global markets. | IT Services and IT Consulting | 🇺🇸 Glen Allen | 13,945 | 1995 |
| 21 | [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 |
| 22 | [Snowflake](https://www.tamtam.ai/c/snowflake) (snowflake.com)<br>The company provides a Data Cloud platform for organizations to unite and mobilize data with scalability, security, and seamless multicloud experience | Software Development | 🇺🇸 The Cloud | 11,689 | 2012 |
| 23 | [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 |  |
| 24 | [Akamai Technologies](https://www.tamtam.ai/c/akamai-technologies) (akamai.com)<br>A global leader in internet infrastructure, Akamai powers and protects online experiences for billions of users daily through innovative solutions | Technology, Information and Internet | 🇺🇸 Cambridge | 10,647 |  |
| 25 | [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 |  |
| 26 | [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 |  |
| 27 | [GoDaddy](https://www.tamtam.ai/c/godaddy) (godaddy.com)<br>This company empowers individuals to effortlessly create, expand, and manage their online presence by providing affordable and easy-to-use services | Technology, Information and Internet | 🇺🇸 Tempe | 9,023 | 1997 |
| 28 | [Railway](https://www.tamtam.ai/c/railway-san-francisco) (railway.com)<br>Building a developer platform as a service. It applies human-friendly design to internet infrastructure, helping great ideas materialize without friction. | Software Development | 🇺🇸 San Francisco | 8,770 | 2020 |
| 29 | [YASH Technologies](https://www.tamtam.ai/c/yash-technologies) (yash.com)<br>Consulting-led digital transformation partner offering technology, advisory, and outsourcing services to optimize client performance and revenue growth globally. | IT Services and IT Consulting | 🇺🇸 East Moline | 8,670 | 1996 |
| 30 | [Uniti Group Inc.](https://www.tamtam.ai/c/uniti-group-inc) (uniti.com)<br>A real estate investment trust focused on acquiring and constructing critical communications infrastructure, including fiber, towers, and leasing assets for wireless and telecom industries | Telecommunications | 🇺🇸 Little Rock | 8,488 | 2015 |
| 31 | [Windstream](https://www.tamtam.ai/c/windstream) (uniti.com)<br>Announcement of merger between Windstream and Uniti, directing followers to Uniti Group, Inc. for future updates and information. | Telecommunications | 🇺🇸 Little Rock | 8,376 | 2006 |
| 32 | [MongoDB](https://www.tamtam.ai/c/mongodb) (mongodb.com)<br>A developer data platform empowering innovation through software and data solutions for modern applications, with a global customer base Visit mongodbcom | Software Development | 🇺🇸 New York | 8,013 | 2007 |
| 33 | [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 |
| 34 | [Veeam Software](https://www.tamtam.ai/c/veeam-software) (veeam.com)<br>Provides data backup, recovery, security, and intelligence solutions ensuring business continuity and data availability across hybrid cloud environments worldwide. | Software Development | 🇺🇸 Seattle | 7,308 | 2006 |
| 35 | [Rackspace Technology](https://www.tamtam.ai/c/rackspace-technology) (rackspace.com)<br>Specializing in multicloud solutions, we assist global companies in overcoming challenges by providing custom cloud services for improved performance | IT Services and IT Consulting | 🇺🇸 San Antonio | 7,046 | 1998 |
| 36 | [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 |
| 37 | [DFX Cloud Solutions](https://www.tamtam.ai/c/dfx-cloud-solutions) (dfxcloudsolutions.com)<br>A startup offering web services, AI, software, and cloud solutions since 2007 Specializes in software development, digital marketing, SEO, and hosting with a focus on client satisfaction | IT Services and IT Consulting | 🇺🇸 Albuquerque | 6,832 | 2007 |
| 38 | [Liberty Latin America](https://www.tamtam.ai/c/liberty-latin-america) (lla.com)<br>A leading telecommunications company in Latin America and the Caribbean offering triple-play and quad-play services, enterprise connectivity, fiber optic network, and IT solutions | Telecommunications | 🇺🇸 Denver | 6,564 |  |
| 39 | [F5](https://www.tamtam.ai/c/f5) (f5.com)<br>It provides multi-cloud application services and security, optimizing and securing apps and APIs for organizations to enhance digital experiences. | IT Services and IT Consulting | 🇺🇸 Seattle | 6,192 |  |
| 40 | [Spectrum Enterprise](https://www.tamtam.ai/c/spectrum-enterprise) (spectrum.com)<br>A national provider of scalable, fiber-based technology solutions for businesses and communications service providers, offering Internet, Ethernet, Voice, TV, and Managed IT solutions | Telecommunications | 🇺🇸 Stamford | 5,583 |  |
| 41 | [Black Box](https://www.tamtam.ai/c/black-box) (blackbox.com)<br>Provides network integration, managed services, technology products, and cybersecurity solutions to global enterprises across multiple industries and regions. | IT Services and IT Consulting | 🇺🇸 Plano | 5,521 | 1976 |
| 42 | [Digital Realty](https://www.tamtam.ai/c/digital-realty) (digitalrealty.com)<br>Global provider of data center, colocation, and interconnection solutions, enabling secure connectivity between companies through a network of 300+ facilities worldwide | IT Services and IT Consulting | 🇺🇸 Austin | 5,263 |  |
| 43 | [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 |
| 44 | [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 |
| 45 | [Astronomer](https://www.tamtam.ai/c/astronomer) (astronomer.io)<br>Unified data orchestration platform powered by Apache Airflow helping enterprises build reliable data products, unlock insights, and power diverse data-driven applications. | Software Development | 🇺🇸 New York | 4,578 | 2018 |
| 46 | [Zayo Group](https://www.tamtam.ai/c/zayo-group) (zayo.com)<br>provides extensive fiber network connectivity and tailored edge solutions powering carriers, cloud providers, data centers, educational institutions, and enterprises | Telecommunications | 🇺🇸 Denver | 4,478 | 2007 |
| 47 | [Presidio](https://www.tamtam.ai/c/presidio) (presidio.com)<br>A technology and innovation-driven company with expertise in automation, security, networking, digital transformation, and cloud computing, providing custom applications and managed services globally | IT Services and IT Consulting | 🇺🇸 New York | 4,355 |  |
| 48 | [AHEAD](https://www.tamtam.ai/c/ahead-chicago) (ahead.com)<br>This company specializes in building and managing digital platforms for successful organizations, accelerating the impact of technology through innovative solutions and engineering expertise | IT Services and IT Consulting | 🇺🇸 Chicago | 4,223 |  |
| 49 | [Extreme Networks](https://www.tamtam.ai/c/extreme-networks) (extremenetworks.com)<br>Leader in AI-powered cloud networking, delivering a unified platform simplifying and securing IT operations, connecting devices, applications, and users for thousands of customers. | Software Development | 🇺🇸 Morrisville | 4,064 | 1996 |
| 50 | [Newfold Digital](https://www.tamtam.ai/c/newfold-digital) (newfold.com)<br>A leading web technology company serving millions globally, offering a portfolio of web services to help customers build and manage their online presence effectively | Software Development | 🇺🇸 Jacksonville | 3,965 |  |
| 51 | [GTT](https://www.tamtam.ai/c/gtt-arlington) (gtt.net)<br>Global managed network and security services provider offering advanced cloud, networking, and security solutions with professional services and exceptional support worldwide | Telecommunications | 🇺🇸 Arlington | 3,917 |  |
| 52 | [TE data](https://www.tamtam.ai/c/te-data)<br>A leading internet service provider in Egypt and Jordan, offering a wide range of communication services, data center hosting, and global partnerships | Non-profit Organizations | 🇺🇸 6th of October | 3,824 | 2001 |
| 53 | [Electronic Data Systems](https://www.tamtam.ai/c/electronic-data-systems) (dxc.com)<br>A global company founded in 1962 offering electronic data processing management personnel and computer hardware, focusing on large corporations and government contracts | IT Services and IT Consulting | 🇺🇸 West Hartford | 3,809 | 1962 |
| 54 | [Ensono](https://www.tamtam.ai/c/ensono) (ensono.com)<br>Ensono is a technology adviser and managed service provider, specializing in digital transformation, cloud migration, and application modernization for businesses worldwide | IT Services and IT Consulting | 🇺🇸 Downers Grove | 3,646 | 1969 |
| 55 | [Visionet Systems Inc.](https://www.tamtam.ai/c/visionet-systems-inc) (visionet.com)<br>It provides digital technology solutions focusing on innovation for various industries, leveraging strategic partnerships and a large team of engineers. | IT Services and IT Consulting | 🇺🇸 Cranbury | 3,585 | 1995 |
| 56 | [MOURI Tech](https://www.tamtam.ai/c/mouri-tech) (mouritech.com)<br>Global Enterprise Solutions Provider partnering with Fortune 500 companies, offering innovative services in enterprise transformation, cloud strategy, analytics, and application development | IT Services and IT Consulting | 🇺🇸 Irving | 3,521 | 2005 |
| 57 | [Beyondsoft](https://www.tamtam.ai/c/beyondsoft) (beyondsoft.com)<br>A leading business IT and consulting company leveraging emerging technologies to deliver tailored solutions globally with a talented team | IT Services and IT Consulting | 🇺🇸 Bellevue | 3,483 |  |
| 58 | [Pomeroy](https://www.tamtam.ai/c/pomeroy) (pomeroy.com)<br>This company provides tailored IT support to ensure continuous business operations, proactive issue prevention, and quick resolution for uninterrupted productivity | IT Services and IT Consulting | 🇺🇸 Hebron | 3,401 | 1982 |
| 59 | [Hughes](https://www.tamtam.ai/c/hughes) (hughes.com)<br>Provides broadband equipment, services, and network operations to millions of consumers, businesses, and governments worldwide via satellite and multi-transport technologies. | Telecommunications | 🇺🇸 Germantown | 3,209 | 1971 |
| 60 | [Zones, LLC](https://www.tamtam.ai/c/zones-llc) (zones.com)<br>Global IT solution provider with expertise in digital workplace, cloud services, networking, security, and staffing solutions Operating in 120+ countries with top certifications | IT Services and IT Consulting | 🇺🇸 Auburn | 3,134 | 1986 |
| 61 | [GURU](https://www.tamtam.ai/c/guru-rockville) (guruconsult.com)<br>An established IT managed service provider offering infrastructure support, data architecture, cloud services, and hybrid solutions with a strong focus on quality, integrity, and customer service | IT Services and IT Consulting | 🇺🇸 Rockville | 3,038 | 1995 |
| 62 | [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 |
| 63 | [Cogent Communications](https://www.tamtam.ai/c/cogent-communications) (cogentco.com)<br>Provides high-quality Internet, Ethernet, and Colocation services to enterprises worldwide through a vast all-optical IP network. | Telecommunications | 🇺🇸 Washington | 2,890 | 1999 |
| 64 | [ETECSA_Cuba](https://www.tamtam.ai/c/etecsa-cuba) (etecsa.cu)<br>A telecommunications company in Cuba offering services to improve quality of life, support the country's development, and prioritize social responsibility | Telecommunications | 🇺🇸 Av 3ra Miramar | 2,837 | 1994 |
| 65 | [Vonage](https://www.tamtam.ai/c/vonage) (vonage.com)<br>It offers unified communications, contact centers, and programmable APIs on a flexible cloud platform, helping enterprises enhance their communication strategies. | IT Services and IT Consulting | 🇺🇸 Holmdel | 2,769 | 2001 |
| 66 | [Integra](https://www.tamtam.ai/c/integra-vancouver) (allstream.com)<br>A leader in business communications offering voice, collaboration, connectivity, and managed IT services to help customers innovate and reach business goals | Telecommunications | 🇺🇸 Vancouver | 2,709 | 1846 |
| 67 | [Login](https://www.tamtam.ai/c/login) (loginbusiness.com)<br>Arizona-based provider of business phone service, internet access, and secure data storage solutions Fully licensed and accredited by AZ ROC | Telecommunications | 🇺🇸 Tucson | 2,708 | 2001 |
| 68 | [NYS Office of Information Technology Services](https://www.tamtam.ai/c/nys-office-of-information-technology-services) (its.ny.gov)<br>Transforming government services in New York State, focusing on innovation, efficiency, and competitiveness through technology and a culture of creativity | IT Services and IT Consulting | 🇺🇸 Albany | 2,611 |  |
| 69 | [QTS Data Centers](https://www.tamtam.ai/c/qts-data-centers) (quantumfiber.com)<br>Provider of data center solutions with over 9 million sq ft of space in North America Offers secure infrastructure, connectivity, and premium customer service | IT Services and IT Consulting | 🇺🇸 Sterling | 2,591 | 2005 |
| 70 | [Park Place Technologies](https://www.tamtam.ai/c/park-place-technologies) (parkplacetechnologies.com)<br>Global leader in data center and networking optimization, serving 21,000+ companies worldwide, improving infrastructure performance, maximizing IT staff efficiency, and optimizing budgets | IT Services and IT Consulting | 🇺🇸 Cleveland | 2,578 | 1991 |
| 71 | [CBTS](https://www.tamtam.ai/c/cbts) (cbts.com)<br>Providing enterprise clients with application modernization, cloud, cybersecurity, digital workplace, and infrastructure solutions to enhance business operations and security. | IT Services and IT Consulting | 🇺🇸 Cincinnati | 2,573 | 1994 |
| 72 | [IT Company](https://www.tamtam.ai/c/it-company) (itcompany.net)<br>A leading IT Company providing customer-centric IT services and solutions, including web hosting, web design, internet marketing, and IT services | IT Services and IT Consulting | 🇺🇸 Australia | 2,567 | 2007 |
| 73 | [EMC](https://www.tamtam.ai/c/emc) (dell.com)<br>Logo update for a company former owner was EMC, now owned by Dell The company's original logo is being reinstated | IT Services and IT Consulting | 🇺🇸 Hopkinton | 2,532 |  |
| 74 | [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 |  |
| 75 | [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 |
| 76 | [Galaxy](https://www.tamtam.ai/c/galaxy) (galaxy.com)<br>Technology-driven financial services firm providing full suite of solutions in digital assets ecosystem through trading, asset management, investments, banking, and mining Headquarters in New York City | Financial Services | 🇺🇸 New York | 2,510 | 2018 |
| 77 | [Vantage Data Centers](https://www.tamtam.ai/c/vantage-data-centers) (vantage-dc.com)<br>Designs and operates scalable, efficient, and sustainable data centers worldwide, serving hyperscalers, cloud providers, and large enterprises. | IT Services and IT Consulting | 🇺🇸 Denver | 2,484 | 2010 |
| 78 | [DigitalOcean](https://www.tamtam.ai/c/digitalocean) (digitalocean.com)<br>DigitalOcean simplifies cloud computing for businesses, providing mission-critical infrastructure and fully managed offerings to help developers rapidly build, deploy, and scale innovative applications | Software Development | 🇺🇸 Broomfield | 2,444 | 2012 |
| 79 | [NinjaOne](https://www.tamtam.ai/c/ninjaone) (ninjaone.com)<br>Provides automated management, patching, and visibility for endpoints, ensuring security and efficiency for organizations of all sizes worldwide. | Software Development | 🇺🇸 Austin | 2,376 |  |
| 80 | [CoreWeave](https://www.tamtam.ai/c/coreweave) (coreweave.com)<br>Specialized cloud provider offering high-performance GPU compute resources for VFX, rendering, AI, and batch processing at faster speeds and lower costs than large public clouds | Technology, Information and Internet | 🇺🇸 New York | 2,372 | 2017 |
| 81 | [Trianz](https://www.tamtam.ai/c/trianz) (trianz.com)<br>Delivers cloud adoption and AI transformation through a unified platform for migration, modernization, multi-cloud management, FinOps, and autonomous federated AI data intelligence. | Technology, Information and Internet | 🇺🇸 Herndon | 2,369 | 2001 |
| 82 | [Web.com](https://www.tamtam.ai/c/web-com) (networksolutions.com)<br>Customer support services transitioned to Network Solutions, directing users to visit networksolutions.com for assistance and inquiries. | Software Development | 🇺🇸 Jacksonville | 2,247 |  |
| 83 | [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 |
| 84 | [C1](https://www.tamtam.ai/c/c1) (onec1.com)<br>Providing innovative, secure technology solutions and customer success services with extensive certifications and global partnerships across North America. | IT Services and IT Consulting | 🇺🇸 Bloomington | 2,141 | 1993 |
| 85 | [Transaction Network Services (TNS)](https://www.tamtam.ai/c/transaction-network-services-tns) (tnsi.com)<br>A global provider of Infrastructure-as-a-Service solutions for financial, communications, and payments markets, supporting secure, flexible, and efficient interactions worldwide | Telecommunications | 🇺🇸 Reston | 2,076 | 1990 |
| 86 | [New Era Technology](https://www.tamtam.ai/c/new-era-technology) (neweratech.com)<br>Global managed technology service provider offering collaboration, networking, security, cloud, and professional services across diverse industries worldwide. | IT Services and IT Consulting | 🇺🇸 West Chester | 2,072 |  |
| 87 | [ePlus inc.](https://www.tamtam.ai/c/eplus-inc) (eplus.com)<br>Leading provider of comprehensive IT solutions, including security, cloud services, data migration, data center management, collaboration, and networking expertise, driven by innovation and customer-centric focus | IT Services and IT Consulting | 🇺🇸 Herndon | 2,071 | 1990 |
| 88 | [Thrive](https://www.tamtam.ai/c/thrive-foxborough) (thrivenextgen.com)<br>Empowering small and mid-market organizations to transform their technology into a strategic advantage, offering AI, cybersecurity, cloud, and MSP/MSSP solutions for innovation and growth. | IT Services and IT Consulting | 🇺🇸 Foxborough | 2,059 | 2000 |
| 89 | [DMI](https://www.tamtam.ai/c/dmi) (dminc.com)<br>provides digital services including cybersecurity, cloud, application development, and infrastructure support to public and private sector clients | IT Services and IT Consulting | 🇺🇸 McLean | 2,001 | 2002 |
| 90 | [Cirion Technologies](https://www.tamtam.ai/c/cirion-technologies) (cirion.it)<br>Digital infrastructure and technology provider in Latin America, offering fiber network, connectivity, colocation, cloud infrastructure, and communication solutions for businesses and government agencies | IT Services and IT Consulting | 🇺🇸 Miami | 1,998 |  |
| 91 | [TTEC Digital](https://www.tamtam.ai/c/ttec-digital) (ttecdigital.com)<br>A global leader in customer experience orchestration, leveraging technology and empathy with expertise in CX strategy, data analytics, and AI | IT Services and IT Consulting | 🇺🇸 Austin | 1,983 |  |
| 92 | [SMX](https://www.tamtam.ai/c/smx) (smxtech.com)<br>A US based IT and engineering solutions provider specializing in Cloud Solutions, Cyber Security, Systems Integration, Data Analytics, and Mission-Focused Engineering | IT Services and IT Consulting | 🇺🇸 Hollywood | 1,934 | 1995 |
| 93 | [Onix](https://www.tamtam.ai/c/onix) (onixnet.com)<br>Cloud consulting company offering innovative solutions in data analytics, modernization, security, and AI/ML, with 20+ years of strategic cloud partnerships and expert global team | IT Services and IT Consulting | 🇺🇸 Princeton | 1,932 | 1992 |
| 94 | [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 |
| 95 | [ECI](https://www.tamtam.ai/c/eci) (eci.com)<br>A global leader in technology solutions for the financial industry, empowering organizations worldwide to achieve new performance levels through innovative technology With offices globally | IT Services and IT Consulting | 🇺🇸 Boston | 1,916 | 1995 |
| 96 | [ACC](https://www.tamtam.ai/c/acc) (acc-corp.net)<br>Provider of advanced technology solutions since 1991, specializing in Data Center, IT, and Business services for clients locally and globally | IT Services and IT Consulting | 🇺🇸 Norwalk | 1,914 | 1991 |
| 97 | [ZT Systems](https://www.tamtam.ai/c/zt-systems) (ztsystems.com)<br>The company provides cloud-enabling server solutions for leading companies, bridging the gap between problem and solution for complex server design needs | Computer Hardware Manufacturing | 🇺🇸 Secaucus | 1,885 | 1994 |
| 98 | [Grafana Labs](https://www.tamtam.ai/c/grafana-labs) (grafana.com)<br>Flexible managed observability platform for monitoring disparate data, resolving incidents quickly, and optimizing telemetry across systems for millions of global open source users. | Software Development | 🇺🇸 New York | 1,861 |  |
| 99 | [iLink Digital](https://www.tamtam.ai/c/ilink-digital) (ilink-digital.com)<br>Helps enterprises move from AI ambition to AI reality with data foundations, security posture, cloud infrastructure, and intelligent applications. | IT Services and IT Consulting | 🇺🇸 Bothell | 1,789 | 2002 |
| 100 | [NWN](https://www.tamtam.ai/c/nwn) (nwn.ai)<br>An award-winning CCSP providing secure cloud communications solutions for organizations to transform the hybrid workspace experience and accelerate their modern work environment journey | IT Services and IT Consulting | 🇺🇸 Boston | 1,775 | 1986 |

## 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 the United States

- [The largest companies in the United States](https://www.tamtam.ai/l/largest-companies-united-states) (104,974)
- [Multinational companies in the United States](https://www.tamtam.ai/l/multinational-companies-united-states) (16,197)
- [Manufacturers in the United States](https://www.tamtam.ai/l/manufacturers-united-states) (8,678)
- [Professional services firms in the United States](https://www.tamtam.ai/l/professional-services-firms-united-states) (7,078)
- [Retail chains in the United States](https://www.tamtam.ai/l/retail-chains-united-states) (6,980)
- [Financial services firms in the United States](https://www.tamtam.ai/l/financial-services-firms-united-states) (6,864)
- [Companies with in-house R&D in the United States](https://www.tamtam.ai/l/r-and-d-companies-united-states) (6,796)
- [IT Services and IT Consulting companies in the United States](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-united-states) (6,694)
- [SaaS companies in the United States](https://www.tamtam.ai/l/saas-companies-united-states) (6,410)
- [IT services companies in the United States](https://www.tamtam.ai/l/it-services-companies-united-states) (5,818)
- [Healthcare providers in the United States](https://www.tamtam.ai/l/healthcare-providers-united-states) (5,810)
- [Critical infrastructure operators in the United States](https://www.tamtam.ai/l/critical-infrastructure-operators-united-states) (5,801)
- [Hospitals and Health Care companies in the United States](https://www.tamtam.ai/l/hospitals-and-health-care-companies-united-states) (5,573)
- [Hardware manufacturers in the United States](https://www.tamtam.ai/l/hardware-companies-united-states) (5,346)
- [Software Development companies in the United States](https://www.tamtam.ai/l/software-development-companies-united-states) (5,311)
- [Financial Services companies in the United States](https://www.tamtam.ai/l/financial-services-companies-united-states) (5,012)
- [Companies with a mobile app in the United States](https://www.tamtam.ai/l/companies-with-mobile-app-united-states) (4,663)
- [Consulting firms in the United States](https://www.tamtam.ai/l/consulting-firms-united-states) (4,381)
- [AI companies in the United States](https://www.tamtam.ai/l/ai-companies-united-states) (4,246)
- [Public sector organisations in the United States](https://www.tamtam.ai/l/public-sector-organisations-united-states) (4,149)
- [Subscription businesses in the United States](https://www.tamtam.ai/l/subscription-businesses-united-states) (3,923)
- [Real Estate companies in the United States](https://www.tamtam.ai/l/real-estate-companies-united-states) (3,808)
- [Higher Education companies in the United States](https://www.tamtam.ai/l/higher-education-companies-united-states) (3,470)
- [Construction companies in the United States](https://www.tamtam.ai/l/construction-companies-united-states) (3,271)

## The same list elsewhere in United States

- [Managed service providers in California](https://www.tamtam.ai/l/managed-service-providers-california) (152)
- [Managed service providers in Texas](https://www.tamtam.ai/l/managed-service-providers-texas) (83)
- [Managed service providers in New York State](https://www.tamtam.ai/l/managed-service-providers-new-york-state) (78)
- [Managed service providers in Florida](https://www.tamtam.ai/l/managed-service-providers-florida) (71)
- [Managed service providers in Georgia](https://www.tamtam.ai/l/managed-service-providers-georgia) (42)
- [Managed service providers in New Jersey](https://www.tamtam.ai/l/managed-service-providers-new-jersey) (36)
- [Managed service providers in Illinois](https://www.tamtam.ai/l/managed-service-providers-illinois) (35)
- [Managed service providers in Virginia](https://www.tamtam.ai/l/managed-service-providers-virginia) (35)
- [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-united-states