Company lists · Data refreshed September 2026

Top 25 IT professional services companies based in the United States

Name: IT professional services 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 20,915 companies tracked

RevenueBase identified 20,915 IT professional services companies headquartered in the United States as of September 2026 and tracks 657,106 professional contacts across them, including 186,944 with verified work emails and 147,708 with mobile numbers. New York is the largest hub.

This list covers IT professional services 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

20,915Companies

657,106Contacts tracked

186,944Verified emails

147,708Mobile numbers

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The 25 largest IT professional services companies based in the United States

Ranked by team size

Top 25 of 20,915 IT professional services 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 professional services 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	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
3	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
4	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
5	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
6	Guidehouse	Partial evidence	Mclean, VA, United StatesHQ checked Sep 27, 2026	10001+	12,815 contacts →
	Partial 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
7	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
8	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
9	Yash Technologies	Indirect evidence	East Moline, IL, United StatesHQ checked Sep 27, 2026	5,001-10,000	7,769 contacts →
	Indirect 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
10	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
11	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
12	Aricent	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 27, 2026	10001+	4,302 contacts →
	Indirect evidence “Aricent is now Altran, delivering industry innovations at future speed.” Source: RevenueBase Database · checked Sep 27, 2026
13	RGP	Partial evidence	Dallas, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	3,650 contacts →
	Partial evidence “RGP (Nasdaq: RGP) is an award-winning global professional services firm with three decades of experience helping the world’s top organizations navigate change and seize…” Source: RevenueBase Database · checked Sep 27, 2026
14	Connection	Partial evidence	Merrimack, NH, United StatesHQ checked Sep 27, 2026	1,001-5,000	3,461 contacts →
	Partial evidence “As a Global IT Solutions Provider, we connect people with technology that enhances growth, elevates productivity, and empowers innovation.” Source: RevenueBase Database · checked Sep 27, 2026
15	Visionet Systems INC	Indirect evidence	Cranbury, NJ, United StatesHQ checked Sep 27, 2026	10001+	3,119 contacts →
	Indirect evidence “Visionet is a premier digital technology solutions company built on the premise of disruptive innovation.” Source: RevenueBase Database · checked Sep 27, 2026
16	VEE Technologies	Partial evidence	Decatur, GA, United StatesHQ checked Sep 27, 2026	5,001-10,000	2,933 contacts →
	Partial evidence “Vee Technologies is a global consulting and professional services organization delivering specialized, technology-enabled solutions.” Source: RevenueBase Database · checked Sep 27, 2026
17	Speridian Technologies	Indirect evidence	Albuquerque, NM, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,619 contacts →
	Indirect evidence “Speridian Technologies is a global consulting and technology services firm that helps enterprises and public sector organizations modernize operations, enhance customer experience…” Source: RevenueBase Database · checked Sep 27, 2026
18	Oxford Global Resources	Indirect evidence	Beverly, MA, United StatesHQ checked Sep 27, 2026	501-1,000	2,564 contacts →
	Indirect evidence “Oxford Global Resources delivers tailored solutions for any technical challenges you are facing using our partnership-first approach.” Source: RevenueBase Database · checked Sep 27, 2026
19	People Tech Group INC	Indirect evidence	Redmond, WA, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,434 contacts →
	Indirect evidence “People Tech Group is a leading Enterprise Solutions, Digital Transformation, Data Intelligence, and Modern Operation services provider.” Source: RevenueBase Database · checked Sep 27, 2026
20	Beyondsoft	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 27, 2026	501-1,000	2,359 contacts →
	Partial evidence “Beyondsoft Consulting is a leading global mid-sized business IT and consulting company that combines modern technologies and proven methodologies to tailor solutions that move…” Source: RevenueBase Database · checked Sep 27, 2026
21	CTG	Partial evidence	Amherst, NY, United StatesHQ checked Sep 27, 2026	5,001-10,000	2,264 contacts →
	Partial evidence “CTG, a Cegeka company, is at the forefront of digital transformation, offering innovative IT solutions and services that accelerate your strategy and project momentum.” Source: RevenueBase Database · checked Sep 27, 2026
22	Astreya	Partial evidence	San Jose, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,215 contacts →
	Partial evidence “Astreya is the leading IT solutions provider for some of the world's most recognizable and innovative organizations.” Source: RevenueBase Database · checked Sep 27, 2026
23	CBTS	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,211 contacts →
	Indirect evidence “CBTS serves enterprise and midmarket clients in all industries across North America.” Source: RevenueBase Database · checked Sep 27, 2026
24	IT Convergence	Partial evidence	Irving, IL, United StatesHQ checked Sep 27, 2026	501-1,000	1,950 contacts →
	Partial evidence “IT Convergence is a global Oracle Platinum Partner with a comprehensive service offering across all three pillars of the Cloud (IaaS, PaaS, SaaS), including Consulting/Advisory…” Source: RevenueBase Database · checked Sep 27, 2026
25	Gspann Technologies, INC	Indirect evidence	Milpitas, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,878 contacts →
	Indirect evidence “GSPANN is a US-based consulting services provider focused on implementations in Enterprise Content Management (ECM), Business Intelligence & Mobile Solutioning initiatives.” 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 professional services 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 professional services companies.
Partial evidence: Its own public description names part of IT professional services companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT professional services 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 20,915 IT professional services companies based in the United States

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IT professional services companies based in the United States at a glance

As of Sep 27, 2026

28.4%Verified-email coverage

22.5%Mobile-number coverage

31.4Average contacts per company

11-50Median size (employees)

2.8%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

9,704

11-50

6,873

51-200

3,073

201-500

741

501-1,000

280

1,001-5,000

156

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

105,5580–30

72,01631–60

5,37061–90

16090–180

3,840180+

Company record updated

Median 91.0d

00–30

105,78831–60

225,21761–90

289,57690–180

36,525180+

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 professional services 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 professional services 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 professional services 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 professional services 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, 186,944 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 professional services 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 professional services 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 professional services companies are there based in the United States?

RevenueBase identified 20,915 IT professional services 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 professional services companies?

New York leads with 583 headquartered companies, followed by Houston (455) and Dallas (343).

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 186,944 verified decision-maker contacts tracked across these 20,915 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.