Top 100 IT Services Companies in Seattle
The Best of March 2026Looking for a top IT services company in Seattle?
IT services set the pace of how fast your company will scale. With a good IT infrastructure in place, you can save time and resources, secure your data and assets, and improve your customer service. It may seem costly at first glance, but the ROI is more than worth it.
Get in touch with Seattle’s leading IT services companies on The Manifest. Cut through the options as you browse through these service providers’ client reviews, awards, and profiles.
List of the Best Seattle IT Companies
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181Undisclosed50 - 249 employeesBellevue, WALaunched in 2009, Witekio, a midsize user experience design agency, is in Lyon, France and Bellevue, Washington. Their services include UX/UI Design and Cybersecurity.Read More
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182Undisclosed250 - 999 employeesSeattle, WALaunched in 2002, Wimmer Solutions is a software development company. The firm offers Custom Software Development and IT strategy consulting.Read More
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183$5,000+10 - 49 employeesSeattle, WABusiness Consulting company Alescent offers Business Consulting and Finance & Accounting Outsourcing (FAO). They were founded in 2010.Read More
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184$25,000+10 - 49 employeesSeattle, WARelativ* is a Marketing Strategy company. Based in Minato City, Japan and Seattle, Washington, the firm was launched in 2015. Their team specializes in Marketing Strategy and Digital Strategy.Read More
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185$1,000+2 - 9 employeesSeattle, WAHeadquartered in Seattle, Washington, Entreprov is an Email Marketing company. They provide Email Marketing and CRM consulting and SI and were founded in 2017.Read More
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186$1,000+250 - 999 employeesRedmond, WAHarbinger Group is an AI company. The Redmond, Washington-based team specializes in Artificial Intelligence and Custom Software Development.Read More
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187$5,000+2 - 9 employeesSammamish, WARead More
Testdel UK Ltd. Is a small application testing company. Launched in 2015, the team provides application testing, IT managed services, IT strategy consulting, and other IT consulting and SI. The firm is located in Harrow, United Kingdom and Chandigarh, India.
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188Undisclosed10 - 49 employeesBremerton, WAPOWTEC SOLUTIONS, LLC is a Bremerton, Washington-based custom software development firm. Their services include Custom Software Development and IT managed services.Read More
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189Undisclosed10 - 49 employeesSeattle, WASmall business intelligence company 2A Consulting, is headquartered in Seattle, Washington. Their services include BI & big data consulting & SI and cloud consulting & SI.Read More
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190Undisclosed10 - 49 employeesSeattle, WAITrellis, LLC is a data analytics company headquartered in Seattle, Washington. Founded in 2013, the team specializes in BI & big data consulting & SI and cloud consulting & SI.Read More
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191Undisclosed10 - 49 employeesSeattle, WAEstablished in 2012, Factor Firm, LLC is an ECM consulting and SI company. Their team focuses on ECM consulting and SI and UX/UI Design.Read More
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192Undisclosed10 - 49 employeesSammamish, WAFounded in 2022, DigBI Consulting LLC is a big data company. The team specializes in BI & big data consulting & SI and AI Consulting and is based in Sammamish, Washington.Read More
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193$5,000+2 - 9 employeesBellevue, WAUpper Octave is an IT staff augmentation company. Located in Bellevue, Washington and Beirut, Lebanon, the team offers IT staff augmentation and IT strategy consulting.Read More
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194$5,000+50 - 249 employeesSeattle, WALaunched in 2008, Teleion Consulting, a midsize business intelligence company, is located in Seattle, Washington. Their team specializes in BI & big data consulting & SI and Content Marketing.Read More
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195Undisclosed50 - 249 employeesSeattle, WAFormidable is an IT managed services company. They are headquartered in Seattle, Washington and London, England. Their team specializes in IT managed services and Custom Software Development.Read More
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196Undisclosed1,000 - 9,999 employeesSeattle, WASlalom Build is an user experience design agency launched in 2001. Their services include UX/UI Design and CRM consulting and SI.Read More
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197Undisclosed50 - 249 employeesTukwila, WASila Solutions Group is a Shelton, Connecticut-based Business Consulting company. Their services include Business Consulting and IT strategy consulting.Read More
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198Undisclosed50 - 249 employeesBellevue, WASkill-Up Technologies is a midsize cloud consulting & SI company. Established in 2016, the team provides cloud consulting & SI and UX/UI Design.Read More
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199$25,000+10 - 49 employeesSeattle, WAOctoon Technologies is a Seattle, Washington-based Digital Strategy company. The team offers Digital Strategy and Social Media Marketing.Read More
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200$10,000+10 - 49 employeesSeattle, WAAmberteq is a small Enterprise App Modernization company. Founded in 2018, the team offers Enterprise App Modernization and cloud consulting & SI.Read More
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201$10,000+50 - 249 employeesBainbridge Island, WAIn Walnut Creek, California and Bainbridge Island, Washington, Spear Marketing Group is an Email Marketing company. The team specializes in Email Marketing and CRM consulting and SI.Read More
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202$5,000+2 - 9 employeesSeattle, WAFounded in 2019, Dark Matter Digital is a Digital Strategy company. Their services include Digital Strategy and UX/UI Design.Read More
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203$1,000+2 - 9 employeesBothell, WASmall Application Testing company Autonomicsoft Solutions LLC, is located in Bothell, Washington. Their services include Application Testing and ERP consulting and SI.Read More
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204Undisclosed250 - 999 employeesBellevue, WABlueprint is a Bellevue, Washington-based Supply Chain Management company. Their services include Supply Chain Management and Compliance Consulting.Read More
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205$1,000+10 - 49 employeesSeattle, WASmall branding agency Homeworld, is based in Seattle, Washington. The team provides Branding and Marketing Strategy.Read More
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206$10,000+10 - 49 employeesSeattle, WAProactiviti, an IT staff augmentation company, specializes in IT staff augmentation and IT strategy consulting. The company is headquartered in Seattle, Washington.Read More
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207Undisclosed10 - 49 employeesSeattle, WAUX design company Hawk Tech Universe is located in Seattle, Washington. They focus on UX/UI Design and IT strategy consulting and were founded in 2024.Read More
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208$5,000+2 - 9 employeesWoodinville, WABlue K LLC is a custom software development company established in 2005. Their services include Custom Software Development and IT managed services.Read More
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209Undisclosed2 - 9 employeesSeattle, WAEstablished in 2011, Generalsoft Corporation is a custom software development firm. Headquartered in Seattle, Washington, the team specializes in Custom Software Development and cloud consulting & SI.Read More
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210Undisclosed2 - 9 employeesSeattle, WAActus Consulting Group is a small Seattle, Washington-based CRM consulting and SI and custom software development company. Their services include CRM consulting and SI and Custom Software Development.Read More
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