Company lists · Data refreshed September 2026

Top 17 IT systems integration firms based in Seattle, United States

Name: IT systems integration firms based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 49 companies tracked

RevenueBase identified 49 company matches for IT systems integration firms associated with Seattle, United States as of September 2026 and tracks 17,294 professional contacts across them, including 6,546 with verified work emails. Across the United States, New York is the largest hub for this category (224 companies); Seattle has 49.

This list covers company matches for IT systems integration firms 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 28, 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 28, 2026 How this list was built

49Companies

17,294Contacts tracked

6,546Verified emails

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The 17 largest IT systems integration firms based in Seattle, United States

Ranked by team size

Top 17 of 49 company matches for IT systems integration firms based in Seattle, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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	Blackstone EIT	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	270 contacts →
	Exact match “Blackstone eIT is a leading System Integrator (SI) and Independent Software Vendor (ISV), globally dedicated to engineering transformative enterprise solutions and intelligent…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Kuelap, INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	51-200	39 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Greene IS	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
4	Region 6 Systems Integration	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	11-50	19 contacts →
	Exact match “We are a West Coast electronic systems integrator serving locations nationwide.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	DPE Systems	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	11-50	12 contacts →
	Exact match “DPE Systems, Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Corbel Solutions, LLC	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	11-50	8 contacts →
	Exact match “Established in 2003, based in Seattle Washington, Corbel Solutions is an elite Enterprise hardware reseller and systems integrator.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Fostec	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	1-10	8 contacts →
	Exact match “Founded in 1998, Fostec is a client-focused Information Technology consulting firm that designs solutions and provides technical expertise to small and mid-sized businesses…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Yavar IT Solutions And Services	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
9	Looi Consulting LLC	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	11-50	7 contacts →
	Exact match “Looi Consulting LLC, a dynamic US-based technology consulting and solutions powerhouse, specializes in propelling businesses forward by seamlessly integrating people and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Elariaà	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	51-200	6 contacts →
	Exact match “From day one, elariaà has strived to serve its clients with honesty and integrity while providing them with the best technology solutions for their business needs.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Enetics Networks	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	1-10	4 contacts →
	Exact match “Enetics Networks was founded in 1998 to provide smart, cost-effective technology solutions for businesses throughout Washington state.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Right Brain Tech Support	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
13	Differential Networks	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	1-10	3 contacts →
	Exact match “We are an IT consulting team that partners with clients to elevate their IT security skills and knowledge in crafting, deploying, and supporting intelligent and leading-edge IP…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	AVI Solutions INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	11-50	3 contacts →
	Exact match “Conference Room Design, Conference Room Integrations, Smart Home Design and Installations, Technology Consultant, Construction Technology Services, Managed IT Services” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	joen.io	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	1-10	3 contacts →
	Exact match “A boutique consulting firm based in Seattle, WA with offices in Orange County, CA specializing in Mobile App Development and Integration of Enterprise systems.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Enterprise Control Systems	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	1-10	2 contacts →
	Exact match “ECS is headquartered in Seattle, WA with additional offices in San Jose CA, Phoenix AZ and Portland OR.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Aorca IT Services & Software	Exact match	Seattle, WA, United StatesHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match “At Aorca, we deliver reliable, secure, and strategic IT services designed to help businesses thrive in an increasingly digital world.” Recorded in the RevenueBase company graph · Sep 28, 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 “IT systems integration firms”. 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 17 of 49 IT systems integration firms based in Seattle, United States

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IT systems integration firms based in Seattle, United States at a glance

As of Sep 28, 2026

37.9%Verified-email coverage

352.9Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

10001+

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 49 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 “IT systems integration firms” 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 6,546 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 28, 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.

IT systems integration firms 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 “IT systems integration firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT systems integration firms are there based in Seattle, United States?

RevenueBase identified 49 company matches for IT systems integration firms 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?

Blackstone EIT 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 IT systems integration firms?

New York leads the United States with 224 company records, followed by Houston (180) and Atlanta (119). Seattle has 49.

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 6,546 professional contacts with verified work emails tracked across these 49 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 28, 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.