Company lists · Data refreshed September 2026

Top 25 IT services consulting firms based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 40,789 companies tracked

RevenueBase identified 40,789 IT services consulting firms headquartered in the United States as of September 2026 and tracks 1,393,767 professional contacts across them, including 424,753 with verified work emails and 330,766 with mobile numbers. New York is the largest hub.

This list covers IT services consulting firms headquartered in the 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 27, 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 27, 2026 86% judged on-target in blind review

40,789Companies

1,393,767Contacts tracked

424,753Verified emails

330,766Mobile numbers

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The 25 largest IT services consulting firms based in the United States

Ranked by team size

Top 25 of 40,789 IT services consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to IT services 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	DXC Technology	Partial evidence	Ashburn, VA, United StatesHQ checked Sep 27, 2026	10001+	82,768 contacts →
	Partial evidence “DXC Technology helps global companies run their mission-critical systems and operations while modernizing IT, optimizing data architectures, and ensuring security and scalability…” Source: RevenueBase Database · checked Sep 27, 2026
2	Kyndryl	Indirect evidence	New York City, NY, United StatesHQ checked Sep 27, 2026	10001+	45,903 contacts →
	Indirect evidence “We have the world’s best talent that design, run, and manage the most advanced and reliable technology infrastructure each day.” Source: RevenueBase Database · checked Sep 27, 2026
3	EXL	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	10001+	40,100 contacts →
	Partial evidence “Choosing a digital partner is about more than capabilities, it’s about collaboration and character.” Source: RevenueBase Database · checked Sep 27, 2026
4	Virtusa	Indirect evidence	Southborough, MA, United StatesHQ checked Sep 27, 2026	10001+	29,613 contacts →
	Indirect evidence “Virtusa is a global product and platform engineering services company that makes experiences better with technology.” Source: RevenueBase Database · checked Sep 27, 2026
5	Teksystems	Indirect evidence	Hanover, MD, United StatesHQ checked Sep 27, 2026	10001+	24,693 contacts →
	Indirect evidence “We’re TEKsystems and TEKsystems Global Services.” Source: RevenueBase Database · checked Sep 27, 2026
6	NTT Data North America	Indirect evidence	Plano, TX, United StatesHQ checked Sep 27, 2026	10001+	22,390 contacts →
	Indirect evidence “NTT DATA, Inc.” Source: RevenueBase Database · checked Sep 27, 2026
7	ZS	Strong evidence	Evanston, IL, United StatesHQ checked Sep 27, 2026	10001+	16,896 contacts →
	Strong evidence “ZS is a management consulting and technology firm that partners with companies to improve life and how we live it.” Source: RevenueBase Database · checked Sep 27, 2026
8	Insight Global	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 27, 2026	n/a	15,553 contacts →
	Partial evidence “Insight Global is an international talent and consulting company that delivers business outcomes in an ever-changing world.” Source: RevenueBase Database · checked Sep 27, 2026
9	CDW	Indirect evidence	Vernon Hills, IL, United StatesHQ checked Sep 27, 2026	10001+	13,155 contacts →
	Indirect evidence “At CDW, we know how to make technology work so people can do great things.” Source: RevenueBase Database · checked Sep 27, 2026
10	Insight	Indirect evidence	Chandler, AZ, United StatesHQ checked Sep 27, 2026	10001+	12,899 contacts →
	Indirect evidence “Insight Enterprises, Inc.” Source: RevenueBase Database · checked Sep 27, 2026
11	Infinite Computer Solutions	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 27, 2026	10001+	12,891 contacts →
	Indirect evidence “Infinite is a.” Source: RevenueBase Database · checked Sep 27, 2026
12	Synechron	Indirect evidence	New York, NY, United StatesHQ checked Sep 27, 2026	10001+	12,820 contacts →
	Indirect evidence “At Synechron, we believe in the power of digital to transform businesses for the better.” Source: RevenueBase Database · checked Sep 27, 2026
13	Guidehouse	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 27, 2026	10001+	12,815 contacts →
	Indirect evidence “Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors.” Source: RevenueBase Database · checked Sep 27, 2026
14	Movate	Indirect evidence	Plano, TX, United StatesHQ checked Sep 27, 2026	10001+	12,237 contacts →
	Indirect evidence “Movate is a digital technology and customer experience services company committed to disrupting the industry with boundless agility, human-centered innovation, and relentless…” Source: RevenueBase Database · checked Sep 27, 2026
15	Apex Systems	Indirect evidence	Glen Allen, VA, United StatesHQ checked Sep 27, 2026	1,001-5,000	12,231 contacts →
	Indirect evidence “Everforth Apex Systems, part of the Everforth ™ Network, is a leading global technology services company specializing in customizable industry-specific solutions that turns…” Source: RevenueBase Database · checked Sep 27, 2026
16	Slalom	Partial evidence	Seattle, WA, United StatesHQ checked Sep 27, 2026	10001+	10,032 contacts →
	Partial evidence “Slalom is a fiercely human business and technology consulting company that leads with outcomes to bring more value, in all ways, always.” Source: RevenueBase Database · checked Sep 27, 2026
17	Mantech	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	5,001-10,000	9,697 contacts →
	Indirect evidence “MANTECH is more than a technology company.” Source: RevenueBase Database · checked Sep 27, 2026
18	ICF	Indirect evidence	Reston, VA, United StatesHQ checked Sep 27, 2026	5,001-10,000	9,459 contacts →
	Indirect evidence “ICF is a leading global solutions and technology provider.” Source: RevenueBase Database · checked Sep 27, 2026
19	World Wide Technology	Indirect evidence	Maryland Heights, MO, United StatesHQ checked Sep 27, 2026	10001+	9,184 contacts →
	Indirect evidence “We are thinkers and doers.” Source: RevenueBase Database · checked Sep 27, 2026
20	Protiviti	Partial evidence	Menlo Park, CA, United StatesHQ checked Sep 27, 2026	5,001-10,000	8,779 contacts →
	Partial evidence “Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Source: RevenueBase Database · checked Sep 27, 2026
21	Comcast Business	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 27, 2026	10001+	8,242 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
22	Ci&t	Indirect evidence	New York, NY, United StatesHQ checked Sep 27, 2026	5,001-10,000	8,037 contacts →
	Indirect evidence “We are your global partner in tech-integrated business solutions, turning AI ambition into measurable business impact.” Source: RevenueBase Database · checked Sep 27, 2026
23	Yash Technologies	Partial evidence	East Moline, IL, United StatesHQ checked Sep 27, 2026	5,001-10,000	7,769 contacts →
	Partial evidence “YASH Technologies is a consulting-led transformation partner with a proven track record of helping customers address their current and prospective digital transformation…” Source: RevenueBase Database · checked Sep 27, 2026
24	Compucom	Indirect evidence	Fort Mill, SC, United StatesHQ checked Sep 27, 2026	5,001-10,000	7,753 contacts →
	Indirect evidence “Unleash Your Digital Workplace Potential with Compucom To be at the forefront of your industry, having the right technology is non-negotiable.” Source: RevenueBase Database · checked Sep 27, 2026
25	SHI International Corp	Indirect evidence	Somerset, NJ, United StatesHQ checked Sep 27, 2026	5,001-10,000	6,734 contacts →
	Indirect evidence “Think of SHI as your personal technology concierge.” Source: RevenueBase Database · checked Sep 27, 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 services 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 IT services consulting firms.
Partial evidence: Its own public description names part of IT services consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT services 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 40,789 IT services consulting firms based in the United States

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IT services consulting firms based in the United States at a glance

As of Sep 27, 2026

30.5%Verified-email coverage

23.7%Mobile-number coverage

34.2Average contacts per company

1-10Median size (employees)

3.2%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

20,969

11-50

12,323

51-200

5,221

201-500

1,293

501-1,000

481

1,001-5,000

306

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 29.0d

241,2240–30

162,84431–60

12,48961–90

36990–180

7,827180+

Company record updated

Median 90.0d

00–30

239,83231–60

488,52961–90

588,52190–180

76,885180+

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 services 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 the United States whose own description of what they do matches “IT services 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 IT services 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 IT services consulting firms, and records with no verified work email. Companies headquartered outside United States 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, 424,753 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 27, 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 services consulting firms by metro

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 services 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 IT services consulting firms are there based in the United States?

RevenueBase identified 40,789 IT services consulting firms headquartered in the 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?

DXC Technology, headquartered in Ashburn, tops this list with the largest team on record.

Which city has the most IT services consulting firms?

New York leads with 1313 headquartered companies, followed by Houston (870) and Atlanta (682).

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 424,753 verified decision-maker contacts tracked across these 40,789 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 27, 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.