These managed service providers in Washington State are primarily large technology groups and mid-sized firms. The list includes Amazon, an e-commerce giant, and Microsoft, which develops software and cloud services. Also present are Amazon Web Services (AWS), a global cloud computing provider, and Veeam Software, which offers data backup and recovery solutions. F5 provides multi-cloud application services and security, while Beyondsoft is a business IT and consulting company.
The data shows a concentration of companies in the Seattle metropolitan area, with many headquartered in Seattle itself, Bellevue, or Redmond. The dominant sectors are IT services and software development, indicating a strong technology hub.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Amazonamazon.com
An e-commerce giant offering a vast selection of products, convenient shopping experiences, and fast delivery, connecting buyers with a wide range of sellers |
1,541,000 | |||
| 2 |
Microsoftmicrosoft.com
Develops and sells software, hardware, and cloud services, including the Windows operating system and Office suite, to improve productivity and digital experiences |
233,562 | |||
| 3 |
Amazon Web Services (AWS)amazon.com
A global cloud computing provider offering scalable, reliable, and cost-effective infrastructure services to businesses worldwide, eliminating the need for capital infrastructure expenses |
147,090 | |||
| 4 |
Veeam Softwareveeam.com
Provides data backup, recovery, security, and intelligence solutions ensuring business continuity and data availability across hybrid cloud environments worldwide. |
7,308 | |||
| 5 | 6,192 | ||||
| 6 |
Beyondsoftbeyondsoft.com
A leading business IT and consulting company leveraging emerging technologies to deliver tailored solutions globally with a talented team |
3,483 | |||
| 7 |
Zones, LLCzones.com
Global IT solution provider with expertise in digital workplace, cloud services, networking, security, and staffing solutions Operating in 120+ countries with top certifications |
3,134 | |||
| 8 |
Integraallstream.com
A leader in business communications offering voice, collaboration, connectivity, and managed IT services to help customers innovate and reach business goals |
2,709 | |||
| 9 |
iLink Digitalilink-digital.com
Helps enterprises move from AI ambition to AI reality with data foundations, security posture, cloud infrastructure, and intelligent applications. |
1,789 | |||
| 10 |
Aditi Consultingaditiconsulting.com
A consultancy that connects talent, teams, and technology solutions to accelerate clients' digital journey through unique experiences and customized solutions |
1,236 | |||
| 11 |
Tegriategria.com
Tegria offers consulting and technology solutions for healthcare organizations to enhance technology, operations, finances, and care quality Learn more at wwwtegriacom |
1,167 | |||
| 12 |
AWS Elementalaws.amazon.com
This company simplifies cloud-based media workflow for content creators, producers, and broadcasters, making it easier to select tools and achieve faster results |
845 | |||
| 13 |
Amazon.com, Inc.amazon.com
A Seattle-based company founded by Jeff Bezos, known for e-commerce, cloud computing through AWS, generative AI with Bedrock platform, and Prime Video streaming service |
657 | |||
| 14 |
Confizconfiz.com
A global provider of technology solutions and consulting services, helping Fortune 500 companies in various industries improve their digital infrastructure through innovative technology solutions |
656 | |||
| 15 |
Temporal Technologiestemporal.io
Develops and distributes an open source durable execution system that makes code fault tolerant, reliable, and easy to maintain. |
542 | |||
| 16 |
SmarTek21smartek21.com
A pioneer in using Generative AI for data ecosystems and conversational interfaces, blending human expertise with cutting-edge technology since 2006 |
395 | |||
| 17 |
Identity Digital Inc.identity.digital
Identity Digital simplifies online connections by managing the world's largest portfolio of domains They provide innovative services for building digital identities |
319 | |||
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. | |||||
| 18 |
Continuantcontinuant.com
A seasoned provider of enterprise communications solutions, specializing in PBX support, voice-to-cloud migrations, audio/video, meeting room management, contact centers, networking, and security |
315 | |||
| 19 |
Kelley Createkelleycreate.com
Business solutions provider since 1974, offering customized technology solutions to simplify operations and drive success for companies in the Western United States |
313 | |||
| 20 |
CommandLinkcommandlink.com
Provides a unified global infrastructure platform combining connectivity, security, voice, and AI with extensive carrier aggregation and dedicated support for enterprise IT. |
299 | |||
| 21 |
Aptly Technology Corporationaptlytech.com
Professional IT outsourcing and consulting services company based in Seattle Specializing in cloud infrastructure, application development, data engineering, AI solutions, contingent staffing, and business operations |
292 | |||
| 22 |
Techno Brain GBStechnobraingroup.com
A leading BPO/ITES provider in Africa offering tailored, affordable, and quality solutions in call center management, back-office services, and digital media services globally |
284 | |||
| 23 |
CSI Interfusioncsi-interfusion.com
Global IT firm specializing in Microsoft technologies, providing cloud services, digital solutions, and business processing with over 60,000 professionals worldwide |
260 | |||
| 24 |
OpsWerksopswerks.com
OpsWerks specializes in creating tailored solutions for data center and cloud operations to make technology work for their customers' exact needs |
249 | |||
| 25 |
Redapt, Inc.redapt.com
A technology solutions provider specializing in datacenter infrastructure, cloud implementations, and navigating technical challenges to accelerate business growth |
199 | |||
| 26 |
Wowrackwowrack.com
A premier cloud service provider offering Managed Hosting, Dedicated Servers, Colocation, Virtualization, Bandwidth Delivery, and Managed Services to global companies |
195 | |||
| 27 |
Inspur USAinspur.com
A leading global provider of datacenter and cloud computing solutions with a strong presence in the US market |
33 | |||
| 28 |
9Logic Technologies Inc9logic.com
Global IT consulting firm offering expertise in cloud computing, IoT, and app development services to help businesses harness the benefits of technology securely and efficiently |
33 | |||
| 29 |
Virtuosity Consulting Group - An InterVision Companyintervision.com
A technology services company focused on executing, automating, and managing critical business and technology initiatives, with a strong emphasis on innovation and teamwork |
31 | |||
| 30 |
MXImxitech.io
An international management consultancy specializing in technology to optimize business performance, serving firms of all sizes globally with a user-friendly methodology |
24 | |||
| 31 |
InTWO Seattleintwo.cloud
A world-leading provider of cloud technology services, helping businesses transform with integrated cloud, collaboration, and application solutions for competitive advantage |
9 | |||
| 32 |
Intriniumtorchlight.io
An IT and Security Solutions company offering consulting, managed services, and transformative solutions to businesses, ensuring secure and efficient operations |
7 | |||
| 33 |
Locke Systems Inclockesystems.com
Provider of comprehensive IT services and consulting for businesses, specializing in managing technology infrastructure and supporting everyday operations |
7 | |||
| 34 | 2 | ||||
| 35 |
DeSeMadesema.com
Industry-leading IT services provider with decades of experience creating advanced systems, optimizing and securing IT environments through expertise and advanced certifications |
2 | |||
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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 Washington State
- The largest companies in Washington State 2,143
- Multinational companies in Washington State 288
- Manufacturers in Washington State 176
- Education providers in Washington State 169
- Professional services firms in Washington State 163
- Retail chains in Washington State 161
- IT Services and IT Consulting companies in Washington State 160
- SaaS companies in Washington State 155
- Critical infrastructure operators in Washington State 149
- IT services companies in Washington State 145
- Companies with in-house R&D in Washington State 140
- Software Development companies in Washington State 140
- Public sector organisations in Washington State 139
- Healthcare providers in Washington State 136
- Companies with a mobile app in Washington State 128
- Hardware manufacturers in Washington State 121
- AI companies in Washington State 110
- Hospitals and Health Care companies in Washington State 107
- Consulting firms in Washington State 106
- Financial services firms in Washington State 92
- Construction companies in Washington State 87
- Subscription businesses in Washington State 86
- Higher Education companies in Washington State 74
- Family-owned companies in Washington State 73
The same list elsewhere in United States
- Managed service providers in the United States 889
- Managed service providers in California 152
- 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 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