Company lists · Data refreshed September 2026

Top 25 IT services and consulting companies based in the United States

Name: IT services and consulting companies 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 41,401 companies tracked

RevenueBase identified 41,401 IT services and consulting companies headquartered in the United States as of September 2026 and tracks 1,951,499 professional contacts across them, including 527,297 with verified work emails and 355,907 with mobile numbers. New York is the largest hub.

This list covers IT services and consulting companies 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

41,401Companies

1,951,499Contacts tracked

527,297Verified emails

355,907Mobile numbers

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The 25 largest IT services and consulting companies based in the United States

Ranked by team size

Top 25 of 41,401 IT services and consulting companies 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 and consulting companies: 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	UST	Indirect evidence	Aliso Viejo, CA, United StatesHQ checked Sep 27, 2026	10001+	34,875 contacts →
	Indirect evidence “UST is a global digital transformation solutions provider.” Source: RevenueBase Database · checked Sep 27, 2026
5	Conduent	Indirect evidence	Florham Park, NJ, United StatesHQ checked Sep 27, 2026	10001+	30,315 contacts →
	Indirect evidence “Conduent delivers digital business solutions and services spanning the commercial, government and transportation spectrum – creating valuable outcomes for its clients and the…” Source: RevenueBase Database · checked Sep 27, 2026
6	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
7	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
8	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
9	Unisys	Indirect evidence	Blue Bell, PA, United StatesHQ checked Sep 27, 2026	10001+	18,676 contacts →
	Indirect evidence “Unisys is a global technology solutions company that powers breakthroughs for the world’s leading organizations.” Source: RevenueBase Database · checked Sep 27, 2026
10	Ricoh Usa, INC	Indirect evidence	Exton, PA, United StatesHQ checked Sep 27, 2026	10001+	17,550 contacts →
	Indirect evidence “At Ricoh, we bring people, processes, and technology together to make information work for you.” Source: RevenueBase Database · checked Sep 27, 2026
11	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
12	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
13	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
14	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
15	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
16	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
17	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
18	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
19	Thoughtworks	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	10001+	11,634 contacts →
	Indirect evidence “We are a global technology consultancy that delivers extraordinary impact by blending design, engineering and AI expertise.” Source: RevenueBase Database · checked Sep 27, 2026
20	Softserve	Indirect evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	10001+	11,123 contacts →
	Indirect evidence “SoftServe is a technology services company specializing in autonomous enterprises with capabilities in AI-native applications, physical and agentic AI, cloud and data solutions.” Source: RevenueBase Database · checked Sep 27, 2026
21	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
22	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
23	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
24	HTC Global Services	Indirect evidence	Troy, MI, United StatesHQ checked Sep 27, 2026	10001+	8,866 contacts →
	Indirect evidence “HTC Global Services Inc, founded in 1990, headquartered in Troy, Michigan, is a global provider of Information Technology and Business Process Services and Solutions.” Source: RevenueBase Database · checked Sep 27, 2026
25	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

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 and consulting companies. 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 and consulting companies.
Partial evidence: Its own public description names part of IT services and consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT services and consulting companies. 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 41,401 IT services and consulting companies based in the United States

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IT services and consulting companies based in the United States at a glance

As of Sep 27, 2026

27.0%Verified-email coverage

18.2%Mobile-number coverage

47.1Average contacts per company

11-50Median size (employees)

3.4%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

19,472

11-50

12,890

51-200

6,178

201-500

1,610

501-1,000

596

1,001-5,000

416

5,001-10,000

10001+

107

Freshness & accuracy

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

Email last verified

Median 29.0d

301,0330–30

199,85431–60

15,86761–90

1,07990–180

9,464180+

Company record updated

Median 90.0d

00–30

268,62331–60

702,81461–90

865,33190–180

114,731180+

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 and consulting companies, 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 and consulting companies”. 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 and consulting companies), 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 and consulting companies, 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, 527,297 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 and consulting companies 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 and consulting companies, 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 and consulting companies are there based in the United States?

RevenueBase identified 41,401 IT services and consulting companies 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 and consulting companies?

New York leads with 1387 headquartered companies, followed by Houston (926) and Dallas (734).

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 527,297 verified decision-maker contacts tracked across these 41,401 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.