Company lists · Data refreshed September 2026

Top 25 Managed service IT companies based in Seattle, United States

Name: Managed service IT companies based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 57 companies tracked

RevenueBase identified 57 company matches for managed service IT companies associated with Seattle, United States as of September 2026 and tracks 443 professional contacts across them, including 187 with verified work emails. Across the United States, New York is the largest hub for this category (364 companies); Seattle has 57.

This list covers company matches for managed service IT companies associated with Seattle, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built

57Companies

443Contacts tracked

187Verified emails

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The 25 largest managed service IT companies based in Seattle, United States

Ranked by team size

Top 25 of 57 company matches for managed service IT companies based in Seattle, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Seitel Systems, INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	45 contacts →
	Exact match “We provide network, server, desktop, and cloud services that include system design, implementation, and support.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	Greene IS	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	35 contacts →
	Exact match “Full service Information Technology Consulting and Outsourcing for Your Business Greene IS specializes in providing comprehensive computer networking solutions to the small and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	Dynamic Computing	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	24 contacts →
	Exact match “Dynamic Computing helps companies and organizations in Seattle and across the Puget Sound region achieve their goals through technology.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Fusion Technologies	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	23 contacts →
	Exact match “Fusion Technologies is a growing IT consulting, managed service provider.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Sentry Computing	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	22 contacts →
	Exact match “Sentry Computing builds smart IT solutions that keep your day-to-day operations running smoothly.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Swat Systems	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	20 contacts →
	Exact match “SWAT Systems is now Convergence Networks!” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	CG Tech Services	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	1-10	15 contacts →
	Exact match “Need reliable tech solutions that help your business thrive?” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Interplay	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	1-10	15 contacts →
	Exact match “Interplay IT is a trusted, Seattle-based IT partner specializing in Architecture, Engineering, Construction, and Mission-Driven Nonprofits.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	DPE Systems	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	12 contacts →
	Exact match “DPE Systems, Inc.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Executech Seattle	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	201-500	11 contacts →
	Exact match “Executech is an award-winning, managed IT services provider.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Cmit Solutions Of Seattle Downtown	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	10 contacts →
	Exact match “We offer computer and IT support for a flat-fee, with round-the-clock maintenance and monitoring.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Black Label IT	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	10 contacts →
	Exact match “We help our clients unleash the power of their network and stop settling for substandard productivity.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Forge Technology Advisors	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	7 contacts →
	Exact match “Forge Technology Advisors provides a customized suite of IT and Telecommunications consulting services-including Cybersecurity, SASE, UCaaS, CCaaS, and Networking-tailored to meet…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Logix Consulting	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	7 contacts →
	Exact match “Our goal is to provide reliable managed IT services to keep your business networks and computers running smoothly at reasonable prices.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	Yavar IT Solutions And Services	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	7 contacts →
	Exact match “Yavar offers Information Technology (IT) services and support to small–medium sized businesses.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	ZEN Techworks	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	1-10	6 contacts →
	Exact match “Zen Techworks was founded with the goal to help businesses and individuals get the most out of their information technology.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Applied Technology Consulting	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	1-10	6 contacts →
	Exact match “Applied Technology Consulting is an information technology and services company based in Seattle, WA.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Digital Seattle, INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	51-200	5 contacts →
	Exact match “Intelligent Technical Solutions is your trusted business partner for all your Cybersecurity, Managed and Co-managed IT support, Risk & Compliance, Data Analytics, and Consulting…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Vertiance	Exact match	Seattle, United StatesHQ recorded Sep 21, 2026	1-10	4 contacts →
	Exact match “Trusted IT support, strategy, and cybersecurity for small businesses.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Right Brain Tech Support	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	11-50	4 contacts →
	Exact match “Right Brain Tech Support is a Seattle based company aiming to make your life, and job easier.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Salmon BAY Technology	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	1-10	3 contacts →
	Exact match “Salmon Bay Technology delivers simple, manageable and affordable information technology services designed to enhance the performance of small to medium sized businesses.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Vcto Secure	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	1-10	3 contacts →
	Exact match “VCTO Secure empowers clients by Making I.T.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	PC Therapist	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	1-10	3 contacts →
	Exact match “PC Therapist is your premiere computer and network specialist providing on-call network administration, managed IT services, and outsourced Chief Technology Officer / Chief…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Plantech Solutions, INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match “PlanTech Solutions is a Seattle based IT company that provides managed services for small to medium sized businesses.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	atlasta.net	Exact match	Seattle, WA, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match “Founded in 1996 by John C.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “managed service IT companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 57 managed service IT companies based in Seattle, United States

See the full list, filter by size, metro and specialty, and access 187 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Managed service IT companies based in Seattle, United States at a glance

As of Sep 21, 2026

42.2%Verified-email coverage

7.8Average contacts per company

11-50Median size (employees)

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 57 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Seattle, United States whose business descriptions match “managed service IT companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 187 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Managed service IT companies by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “managed service IT companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many managed service IT companies are there based in Seattle, United States?

RevenueBase identified 57 company matches for managed service IT companies associated with Seattle, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Seitel Systems, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most managed service IT companies?

New York leads the United States with 364 company records, followed by Houston (232) and Miami (149). Seattle has 57.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 187 professional contacts with verified work emails tracked across these 57 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.