Company lists · Data refreshed September 2026

Top 15 IT consultancies based in Oak Brook, United States

Name: IT consultancies based in Oak Brook, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 26, 2026 32 companies tracked

RevenueBase identified 32 IT consultancies headquartered in Oak Brook, United States as of September 2026 and tracks 2,289 professional contacts across them, including 649 with verified work emails. Across the United States, New York is the largest hub for this category (1,571 companies); Oak Brook has 32.

This list covers IT consultancies headquartered in Oak Brook, 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 26, 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 26, 2026 86% judged on-target in blind review

32Companies

2,289Contacts tracked

649Verified emails

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The 15 largest IT consultancies based in Oak Brook, United States

Ranked by team size

Top 15 of 32 IT consultancies based in Oak Brook, United States, ranked by team size, largest first. Data refreshed Sep 26, 2026. RevenueBase Smart Search rates how each company's information relates to IT consultancies: 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	Cienet Technologies	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	1,001-5,000	701 contacts →
	Indirect evidence “CIeNET Technologies is a leading technology service provider in the areas of technical consulting, software engineering and solution services.” Source: RevenueBase Database · checked Sep 26, 2026
2	Senecaglobal	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	201-500	358 contacts →
	Indirect evidence “SenecaGlobal is a world-class software development and technical advisory firm, focused on middle-market clients.” Source: RevenueBase Database · checked Sep 26, 2026
3	True Group, INC	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	201-500	245 contacts →
	Indirect evidence “True is a transformative solutions provider and integrator… but what does that really say about True?” Source: RevenueBase Database · checked Sep 26, 2026
4	Burwood Group	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	201-500	223 contacts →
	Indirect evidence “The urgent need for technology to solve business problems more efficiently, decrease costs, and mitigate risk has increased.” Source: RevenueBase Database · checked Sep 26, 2026
5	Pmsquare	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	51-200	87 contacts →
	Indirect evidence “PMsquare is a Business Consulting and Technology Services company specializing in data, analytics, cloud transformation, and AI-powered solutions.” Source: RevenueBase Database · checked Sep 26, 2026
6	Resource 1, INC	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	51-200	48 contacts →
	Indirect evidence “Resource 1 is a privately held national consulting firm established in 1982 with Corporate Headquarters and Technology Center in Oak Brook, Illinois.” Source: RevenueBase Database · checked Sep 26, 2026
7	Geneca	Partial evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	51-200	47 contacts →
	Partial evidence “20 years ago, Geneca was born as a technology consulting firm, fueled by the conviction that technology investments are judged by the business benefit it delivers.” Source: RevenueBase Database · checked Sep 26, 2026
8	Risetime	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	51-200	37 contacts →
	Indirect evidence “Risetime experts work with you to understand your existing environment, what’s working, and areas to improve.” Source: RevenueBase Database · checked Sep 26, 2026
9	Crossroads RMC	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	11-50	37 contacts →
	Indirect evidence “Your Infor ERP Go-To Experts!” Source: RevenueBase Database · checked Sep 26, 2026
10	Windval Technology Solutions LLC	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	11-50	23 contacts →
	Indirect evidence “Advisory Consulting is the intersection of Management Consulting and Technology Expertise.” Source: RevenueBase Database · checked Sep 26, 2026
11	Hitechpeople INC	Indirect evidence	Oak Brook, United StatesHQ checked Sep 26, 2026	11-50	21 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 26, 2026
12	Xcelacore	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	11-50	12 contacts →
	Indirect evidence “Xcelacore is a technology consulting firm that helps businesses across industries get the most out of technology with flexibility, quality, and for less.” Source: RevenueBase Database · checked Sep 26, 2026
13	Meridian Technology Solutions INC	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	51-200	11 contacts →
	Indirect evidence “Meridian Technology Solutions is a leading information technology solutions company that specializes in providing industry-focused business solutions and services to clients…” Source: RevenueBase Database · checked Sep 26, 2026
14	EQ Technology Group, INC	Partial evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	11-50	10 contacts →
	Partial evidence “EQ Technology Group, which was founded in 2011, is an Oak Brook-based technology company that specializes in providing comprehensive managed IT and Networking services.” Source: RevenueBase Database · checked Sep 26, 2026
15	IS Consulting Services, LLC	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 26, 2026	11-50	4 contacts →
	Indirect evidence “Technology should inspire confidence-not create uncertainty.” Source: RevenueBase Database · checked Sep 26, 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: IT consultancies. 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 IT consultancies.
Partial evidence: Its own public description names part of IT consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT consultancies. 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 15 of 32 IT consultancies based in Oak Brook, United States

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IT consultancies based in Oak Brook, United States at a glance

As of Sep 26, 2026

28.4%Verified-email coverage

71.5Average contacts per company

11-50Median size (employees)

Sep 26, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Oak Brook, so it is reported there. Company counts and contact totals on this page are exact for Oak Brook, over 32 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 IT consultancies, 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 Oak Brook, United States whose own description of what they do matches “IT consultancies”. 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 IT consultancies), 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 IT consultancies, and records with no verified work email. Companies headquartered outside Oak Brook 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, 649 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 26, 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.

IT consultancies 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 IT consultancies, 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 IT consultancies are there based in Oak Brook, United States?

RevenueBase identified 32 IT consultancies headquartered in Oak Brook, 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?

Cienet Technologies, headquartered in Oak Brook, tops this list with the largest team on record.

Which city in the United States has the most IT consultancies?

New York leads the United States with 1,571 headquartered companies, followed by Houston (886) and Chicago (783). Oak Brook has 32.

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 649 verified decision-maker contacts tracked across these 32 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 26, 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.