Company lists · Data refreshed September 2026

Top 25 Big IT consulting firms based in Chicago, United States

Name: Big IT consulting firms based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 422 companies tracked

RevenueBase identified 422 big IT consulting firms headquartered in Chicago, United States as of September 2026 and tracks 13,999 professional contacts across them, including 6,309 with verified work emails. Across the United States, New York is the largest hub for this category (798 companies); Chicago has 422.

This list covers big IT consulting firms headquartered in Chicago, 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 23, 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 23, 2026 86% judged on-target in blind review

422Companies

13,999Contacts tracked

6,309Verified emails

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The 25 largest big IT consulting firms based in Chicago, United States

Ranked by team size

Top 25 of 422 big IT consulting firms based in Chicago, United States, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to big IT consulting firms: 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	AHEAD	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	1,001-5,000	2,989 contacts →
	Indirect evidence “AHEAD accelerates strategy into execution by engineering integrated solutions across infrastructure, applications, data, and security.” Source: RevenueBase Database · checked Sep 23, 2026
2	West Monroe	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	1,001-5,000	2,129 contacts →
	Partial evidence “West Monroe is a global business and technology consulting firm passionate about creating value for our clients.” Source: RevenueBase Database · checked Sep 23, 2026
3	Navigant	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	5,001-10,000	1,029 contacts →
	Partial evidence “Guidehouse is a leading global provider of consulting services to the public and commercial markets with broad capabilities in management, technology, and risk consulting.” Source: RevenueBase Database · checked Sep 23, 2026
4	DLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	201-500	546 contacts →
	Partial evidence “DLC is an award-winning industry leader in Finance, Accounting, Program Management & Process Improvement Consulting.” Source: RevenueBase Database · checked Sep 23, 2026
5	Aarete	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	201-500	543 contacts →
	Partial evidence “AArete is a global management and technology consulting firm specializing in driving profitability improvement, digital transformation, and strategy & change for clients.” Source: RevenueBase Database · checked Sep 23, 2026
6	SDI Presence	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	201-500	391 contacts →
	Partial evidence “SDI Presence LLC is an IT consultancy and managed services provider (MSP) that leverages its strong team presence to advance our clients to a secure digital enterprise.” Source: RevenueBase Database · checked Sep 23, 2026
7	Beyond KEY	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	201-500	363 contacts →
	Indirect evidence “Our Journey of Growth, Trust, and Purpose Two decades ago, Beyond Key started with a vision not just to solve business problems with technology, but to create lasting impact.” Source: RevenueBase Database · checked Sep 23, 2026
8	Q1 Technologies, INC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	1,001-5,000	262 contacts →
	Partial evidence “Q1 Technologies is a global IT solutions and services provider focused on delivering innovative, scalable, and high-impact technology outcomes for enterprises worldwide.” Source: RevenueBase Database · checked Sep 23, 2026
9	PTS Consulting Services Global	Strong evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	201-500	251 contacts →
	Strong evidence “Overview PTS Consulting Services (People Technology Services), is a firm that specializes in providing IT consulting and Business consulting services.” Source: RevenueBase Database · checked Sep 23, 2026
10	Accretive Solutions	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	501-1,000	217 contacts →
	Indirect evidence “Your World.” Source: RevenueBase Database · checked Sep 23, 2026
11	RL Canning	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	201-500	205 contacts →
	Partial evidence “RL Canning is a global IT managed service and consultancy dedicated to working alongside our customers to enhance the digital workplace with a clear focus on value by maximizing…” Source: RevenueBase Database · checked Sep 23, 2026
12	Maven Wave, An Eviden Company	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	501-1,000	184 contacts →
	Indirect evidence “As of April 2023, Maven Wave is now part of Eviden, at Atos business.” Source: RevenueBase Database · checked Sep 23, 2026
13	Krasan Consulting Services	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	201-500	172 contacts →
	Partial evidence “Krasan Consulting Services is a Chicago-based boutique management consulting and technology solutions integrator.” Source: RevenueBase Database · checked Sep 23, 2026
14	RKON	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	51-200	163 contacts →
	Partial evidence “Since 1998, RKON has delivered IT Transformation helping private equity and enterprise firms achieve Quiet IT from vision to execution.” Source: RevenueBase Database · checked Sep 23, 2026
15	STA Group	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	51-200	143 contacts →
	Indirect evidence “Strategies For Business Transformation STA Group offers end-to-end business, technology and digital strategy for today’s leading businesses.” Source: RevenueBase Database · checked Sep 23, 2026
16	Dunn Solutions, A Kaartech Company	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	1,001-5,000	141 contacts →
	Indirect evidence “Dunn Solutions is a digital commerce and business transformation consultancy focused on delivering velocity to our clients.” Source: RevenueBase Database · checked Sep 23, 2026
17	Alam, An Accentedge Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	201-500	128 contacts →
	Partial evidence “Alam & Company LLC, a Microsoft Certified Partner Consulting company, provides information technology, project management, six sigma, and outsourcing services to public and…” Source: RevenueBase Database · checked Sep 23, 2026
18	Cuesta Partners	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	51-200	122 contacts →
	Indirect evidence “We believe in the power of technology to create sustained, differentiated advantage.” Source: RevenueBase Database · checked Sep 23, 2026
19	Clarity Partners	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	51-200	121 contacts →
	Partial evidence “Clarity Partners is a privately held full-service management and technology consulting firm.” Source: RevenueBase Database · checked Sep 23, 2026
20	Diamond Management & Technology Consultants	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	501-1,000	114 contacts →
	Partial evidence “Diamond is a management and technology consulting firm.” Source: RevenueBase Database · checked Sep 23, 2026
21	W. Capra	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	51-200	108 contacts →
	Indirect evidence “W.” Source: RevenueBase Database · checked Sep 23, 2026
22	Productive Edge	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	201-500	107 contacts →
	Partial evidence “Productive Edge is a digital business consulting and technology solutions company.” Source: RevenueBase Database · checked Sep 23, 2026
23	Kenway Consulting	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	51-200	104 contacts →
	Partial evidence “Kenway Consulting is a management and technology consulting firm whose entire reason for existence is to help companies and its employees.” Source: RevenueBase Database · checked Sep 23, 2026
24	CGN Global	Partial evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	201-500	104 contacts →
	Partial evidence “A Chicago-based firm with offices in Mexico, the UK, France, Turkey, India, and China, providing supply chain, digital, strategy and transformation consulting services to…” Source: RevenueBase Database · checked Sep 23, 2026
25	Comtek International	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 23, 2026	201-500	88 contacts →
	Indirect evidence “Comtek International, Inc.” Source: RevenueBase Database · checked Sep 23, 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: big IT consulting firms. 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 big IT consulting firms.
Partial evidence: Its own public description names part of big IT consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name big IT consulting firms. 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 422 big IT consulting firms based in Chicago, United States

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Big IT consulting firms based in Chicago, United States at a glance

As of Sep 23, 2026

45.1%Verified-email coverage

33.2Average contacts per company

11-50Median size (employees)

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

199

11-50

128

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 422 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 big IT consulting firms, 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 Chicago, United States whose own description of what they do matches “big IT consulting firms”. 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 big IT consulting firms), 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 big IT consulting firms, and records with no verified work email. Companies headquartered outside Chicago 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, 6,309 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 23, 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.

Big IT consulting firms 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 big IT consulting firms, 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 big IT consulting firms are there based in Chicago, United States?

RevenueBase identified 422 big IT consulting firms headquartered in Chicago, 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?

AHEAD, headquartered in Chicago, tops this list with the largest team on record.

Which city in the United States has the most big IT consulting firms?

New York leads the United States with 798 headquartered companies, followed by Houston (534) and Dallas (423). Chicago has 422.

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 6,309 verified decision-maker contacts tracked across these 422 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 23, 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.