Company lists · Data refreshed September 2026

Top 25 Systems integration consultants based in Seattle, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 54 companies tracked

RevenueBase identified 54 systems integration consultants headquartered in Seattle, United States as of September 2026 and tracks 806 professional contacts across them, including 442 with verified work emails. Across the United States, New York is the largest hub for this category (220 companies); Seattle has 54.

This list covers systems integration consultants headquartered in Seattle, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 14, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 14, 2026 86% judged on-target in blind review

54Companies

806Contacts tracked

442Verified emails

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The 25 largest systems integration consultants based in Seattle, United States

Ranked by team size

Top 25 of 54 systems integration consultants based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to systems integration consultants: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Blackstone EIT	Partial evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1,001-5,000	270 contacts →
	Partial evidence “Blackstone eIT is a leading System Integrator (SI) and Independent Software Vendor (ISV), globally dedicated to engineering transformative enterprise solutions and intelligent…” Source: RevenueBase Database · checked Sep 14, 2026
2	Hargis Engineers	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	201-500	188 contacts →
	Indirect evidence “Hargis Engineers is a mechanical, electrical, telecommunications, security, energy consulting engineering, and commissioning firm.” Source: RevenueBase Database · checked Sep 14, 2026
3	Envorso	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	51-200	51 contacts →
	Indirect evidence “At Envorso, we specialize in guiding businesses through the complexities of modern engineering, software, and digital transformation.” Source: RevenueBase Database · checked Sep 14, 2026
4	Insidesource Seattle	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	51-200	46 contacts →
	Indirect evidence “We are interiors integrators.” Source: RevenueBase Database · checked Sep 14, 2026
5	Seitel Systems, INC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	11-50	45 contacts →
	Partial evidence “We provide network, server, desktop, and cloud services that include system design, implementation, and support.” Source: RevenueBase Database · checked Sep 14, 2026
6	Greene IS	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	11-50	35 contacts →
	Indirect evidence “Full service Information Technology Consulting and Outsourcing for Your Business Greene IS specializes in providing comprehensive computer networking solutions to the small and…” Source: RevenueBase Database · checked Sep 14, 2026
7	Region 6 Systems Integration	Partial evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	11-50	19 contacts →
	Partial evidence “We are a West Coast electronic systems integrator serving locations nationwide.” Source: RevenueBase Database · checked Sep 14, 2026
8	Olive Goose	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	11-50	16 contacts →
	Indirect evidence “Olive + Goose is an agile, quality-focused company, trusted by small and large businesses alike.” Source: RevenueBase Database · checked Sep 14, 2026
9	Corbel Solutions, LLC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	11-50	8 contacts →
	Partial evidence “Established in 2003, based in Seattle Washington, Corbel Solutions is an elite Enterprise hardware reseller and systems integrator.” Source: RevenueBase Database · checked Sep 14, 2026
10	Fostec	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1-10	8 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 14, 2026
11	Looi Consulting LLC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	11-50	7 contacts →
	Partial evidence “Looi Consulting LLC, a dynamic US-based technology consulting and solutions powerhouse, specializes in propelling businesses forward by seamlessly integrating people and…” Source: RevenueBase Database · checked Sep 14, 2026
12	Elariaà	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	51-200	6 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 14, 2026
13	Enetics Networks	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1-10	4 contacts →
	Indirect evidence “Enetics Networks was founded in 1998 to provide smart, cost-effective technology solutions for businesses throughout Washington state.” Source: RevenueBase Database · checked Sep 14, 2026
14	Cogenix	Partial evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1-10	4 contacts →
	Partial evidence “Cogenix offers business consulting, application development and software integration services to our client base.” Source: RevenueBase Database · checked Sep 14, 2026
15	Fellow	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1-10	3 contacts →
	Indirect evidence “Fellow Inc.” Source: RevenueBase Database · checked Sep 14, 2026
16	Differential Networks	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1-10	3 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 14, 2026
17	Vital Information Technology	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1-10	3 contacts →
	Indirect evidence “Vital Information Technology has provided Information Technology consulting services in Seattle and the greater Puget Sound region for over 15 years.” Source: RevenueBase Database · checked Sep 14, 2026
18	AVI Solutions INC	Strong evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	11-50	3 contacts →
	Strong evidence “Conference Room Design, Conference Room Integrations, Smart Home Design and Installations, Technology Consultant, Construction Technology Services, Managed IT Services” Source: RevenueBase Database · checked Sep 14, 2026
19	Enterprise Control Systems	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Indirect evidence “ECS is headquartered in Seattle, WA with additional offices in San Jose CA, Phoenix AZ and Portland OR.” Source: RevenueBase Database · checked Sep 14, 2026
20	Urban-Technology Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Indirect evidence “Urban-Technology Group is a Seattle-based independent consulting firm, focused on helping companies leverage technology to enhance business operations, maximize internal resources…” Source: RevenueBase Database · checked Sep 14, 2026
21	NEW Harbor	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Indirect evidence “At New Harbor, we specialize in expert IT solutions that empower businesses to reach their full potential.” Source: RevenueBase Database · checked Sep 14, 2026
22	Blacktee Systems	Partial evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Partial evidence “Blacktee Systems combines software development skills from both the control systems programming and web application development realms.” Source: RevenueBase Database · checked Sep 14, 2026
23	NEW Frontier Technologies	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	11-50	1 contacts →
	Indirect evidence “As strategic problem-solvers who create a connection between business and technology, New Frontier Technologies is passionate about client success.” Source: RevenueBase Database · checked Sep 14, 2026
24	Sound Network Integration	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1-10	1 contacts →
	Indirect evidence “Putting our Clients in Control Since 1991, Seattle-based SNI has provided technology solutions that help businesses stay ahead of changes in the marketplace.” Source: RevenueBase Database · checked Sep 14, 2026
25	Sommita Technology Group LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	1-10	1 contacts →
	Indirect evidence “Sommita Technology Group LLC is a Trusted Information Technology Services Advisor.” Source: RevenueBase Database · checked Sep 14, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: systems integration consultants. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names systems integration consultants.
Partial evidence: Its own public description names part of systems integration consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name systems integration consultants. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 54 systems integration consultants based in Seattle, United States

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Systems integration consultants based in Seattle, United States at a glance

As of Sep 14, 2026

54.8%Verified-email coverage

14.9Average contacts per company

1-10Median size (employees)

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 54 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among systems integration consultants, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Seattle, United States whose own description of what they do matches “systems integration consultants”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names systems integration consultants), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among systems integration consultants, and records with no verified work email. Companies headquartered outside Seattle are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 442 across the full list. 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 14, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Systems integration consultants by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names systems integration consultants, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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

RevenueBase identified 54 systems integration consultants headquartered in Seattle, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Blackstone EIT, headquartered in Seattle, tops this list with the largest team on record.

Which city in the United States has the most systems integration consultants?

New York leads the United States with 220 headquartered companies, followed by Houston (174) and Atlanta (130). Seattle has 54.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 442 verified decision-maker contacts tracked across these 54 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 14, 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 Smart Search, 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.