Top 100 IT Services Companies in Seattle
The Best of December 2025Looking 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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$5,000+50 - 249 employeesGaithersburg, MDRead More
DesignDATA is an IT managed services company. Established in 1979, the midsize agency is headquartered in Gaithersburg, Maryland and Washington, District of Columbia. Their services include IT managed services, IT strategy consulting, cloud consulting & SI, and Cybersecurity.
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$1,000+50 - 249 employeesNaperville, ILBetterWorld Technology is a midsize IT managed services company launched in 2003. Their services include IT managed services, Cybersecurity, IT strategy consulting, and Compliance Consulting. The company is headquartered in Naperville, Illinois; Naperville, Illinois; Winter Park, Florida and Denver, Colorado.Read More
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151Undisclosed250 - 999 employeesSeattle, WAFounded in 2007, ExtraHop is a Cybersecurity company. The team offers Cybersecurity and IT strategy consulting.Read More
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152Undisclosed50 - 249 employeesSeattle, WADomainTools is a Cybersecurity company. The Seattle, Washington-based company was founded in 2004. Their services include Cybersecurity.Read More
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153Undisclosed50 - 249 employeesBellevue, WARight! Systems, Inc. Is a Cybersecurity and IT managed services company founded in 1993. The midsize team offers Cybersecurity and IT managed services.Read More
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154Undisclosed10 - 49 employeesSeattle, WADigitSec, Inc., a Cybersecurity company, was founded in 2017. The firm offers Cybersecurity and Compliance Consulting.Read More
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155Undisclosed10 - 49 employeesSeattle, WABlueArch is a Cybersecurity company. The company is based in Seattle, Washington. Their services include Cybersecurity and cloud consulting & SI.Read More
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156Undisclosed50 - 249 employeesSeattle, WAMidsize Cybersecurity company Envorso, is headquartered in Seattle, Washington and Detroit, Michigan. The team focuses on Cybersecurity and Custom Software Development.Read More
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157Undisclosed250 - 999 employeesKent, WAFounded in 1974, Kelley Create is a Cybersecurity company. The midsize team focuses on Cybersecurity and IT strategy consulting.Read More
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158Undisclosed50 - 249 employeesSeattle, WABased in Seattle, Washington and Spokane, Washington, Cerium Networks is an unified communications consulting & SI company. The team provides unified communications consulting & SI and Cybersecurity.Read More
Industries
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159Undisclosed10 - 49 employeesSeattle, WASentry Computing, a Cybersecurity company, was launched in 2008. The small team specializes in Cybersecurity and IT managed services.Read More
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160Undisclosed50 - 249 employeesSeattle, WALeviathan Security Group, a Cybersecurity company, focuses on Cybersecurity. The firm is headquartered in Seattle, Washington.Read More
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161Undisclosed10 - 49 employeesSeattle, WADynamic Computing is a Cybersecurity company. Established in 2000, the company is headquartered in Seattle, Washington. Their team specializes in Cybersecurity and IT managed services.Read More
Industries
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162Undisclosed2 - 9 employeesSeattle, WAZen Techworks, Inc is a Cybersecurity company. They are located in Seattle, Washington and have small team of experts. Their services include Cybersecurity and IT strategy consulting.Read More
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163Undisclosed2 - 9 employeesSeattle, WASalmon Bay Technology, a Cybersecurity company, offers Cybersecurity and IT managed services. The firm is in Seattle, Washington.Read More
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164Undisclosed2 - 9 employeesSeattle, WAEstablished in 2001, Vital Information Technology is a Cybersecurity company. The team offers Cybersecurity and IT managed services.Read More
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165Undisclosed250 - 999 employeesSeattle, WAEstablished in 2012, Tezo is an user experience design agency. The team provides UX/UI Design and IT strategy consulting.Read More
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166Undisclosed10 - 49 employeesSeattle, WACG Tech Services is an IT strategy consulting company founded in 2004. The team focuses on IT strategy consulting and BI & big data consulting & SI and is headquartered in Seattle, Washington.Read More
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167Undisclosed2 - 9 employeesSeattle, WAVertiance is a Seattle, Washington-based Cybersecurity company. They focus on Cybersecurity.Read More
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168Undisclosed50 - 249 employeesSeattle, WAKnock CRM is a CRM consulting and SI company. They are located in Seattle, Washington and have midsize team. Their services include CRM consulting and SI.Read More
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169Undisclosed2 - 9 employeesSeattle, WAKeyplay is a CRM consulting and SI company. The team is in Seattle, Washington, and their services include CRM consulting and SI.Read More
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170Undisclosed10 - 49 employeesSeattle, WAIVOXY Consulting is an IT managed services company. They are based in Portland, Oregon and Seattle, Washington, and their services include IT managed services.Read More
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171Undisclosed10 - 49 employeesBremerton, WAHelp Desk Cavalry is a Cybersecurity company. Established in 2013, the company offers Cybersecurity and IT managed services.Read More
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172$1,000+50 - 249 employeesKent, WAIn Kent, Washington, Accelerate is a Marketing Strategy company. They provide Marketing Strategy and Digital Strategy and were launched in 2020.Read More
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173$50,000+50 - 249 employeesSeattle, WAJanea Systems is an artificial intelligence company. Their team is located in Seattle, Washington. The firm provides Artificial Intelligence and BI & big data consulting & SI.Read More
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174Undisclosed50 - 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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175Undisclosed250 - 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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176$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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177$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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178$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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179$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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180Undisclosed10 - 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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