Company lists · Data refreshed September 2026

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

Name: IT consulting and support 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 21,133 companies tracked

RevenueBase identified 21,133 IT consulting and support companies headquartered in the United States as of September 2026 and tracks 534,240 professional contacts across them, including 149,279 with verified work emails and 119,493 with mobile numbers. New York is the largest hub.

This list covers IT consulting and support 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

21,133Companies

534,240Contacts tracked

149,279Verified emails

119,493Mobile numbers

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

Ranked by team size

Top 25 of 21,133 IT consulting and support 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 consulting and support 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	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
6	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
7	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
8	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
9	Isoftstone	Strong evidence	Plano, TX, United StatesHQ checked Sep 27, 2026	10001+	4,041 contacts →
	Strong evidence “iSoftStone is a global IT service and consulting company that creates value and drives success through technology solutions, service excellence, and digital innovation.” Source: RevenueBase Database · checked Sep 27, 2026
10	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
11	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
12	Speridian Technologies	Partial evidence	Albuquerque, NM, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,619 contacts →
	Partial 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
13	Beyondsoft	Strong evidence	Bellevue, WA, United StatesHQ checked Sep 27, 2026	501-1,000	2,359 contacts →
	Strong 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
14	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
15	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
16	IT Convergence	Strong evidence	Irving, IL, United StatesHQ checked Sep 27, 2026	501-1,000	1,950 contacts →
	Strong 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
17	Gspann Technologies, INC	Partial evidence	Milpitas, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,878 contacts →
	Partial 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
18	Jade Global	Partial evidence	San Jose, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,872 contacts →
	Partial evidence “Jade Global is a premier consulting, integration, and managed services partner helping enterprises modernize, innovate, and scale.” Source: RevenueBase Database · checked Sep 27, 2026
19	Gyansys INC	Partial evidence	Carmel, IN, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,864 contacts →
	Partial evidence “Founded in 2005, GyanSys is a leading global system integrator company supporting enterprise customers worldwide.” Source: RevenueBase Database · checked Sep 27, 2026
20	Tech Mahindra	Indirect evidence	Streetman, TX, United StatesHQ checked Sep 27, 2026	n/a	1,860 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
21	Quadrant Technologies	Partial evidence	Redmond, WA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,664 contacts →
	Partial evidence “Quadrant Technologies: Your Go-to IT Services Partner for a Digital Future For over a decade, Quadrant Technologies has established itself as a trailblazer in the IT services…” Source: RevenueBase Database · checked Sep 27, 2026
22	Leverx	Indirect evidence	Miami, FL, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,632 contacts →
	Indirect evidence “LeverX is an SAP Gold Partner, SAP Global Strategic Supplier, and enterprise solutions provider for businesses worldwide, including companies from the Fortune 500 list.” Source: RevenueBase Database · checked Sep 27, 2026
23	Searce INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,511 contacts →
	Indirect evidence “Searce is an AI-native, engineering-led modern tech consultancy that empowers clients to futurify by delivering real business outcomes.” Source: RevenueBase Database · checked Sep 27, 2026
24	Joulestowatts Business Solutions PVT LTD	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,435 contacts →
	Indirect evidence “At JoulestoWatts Business Solutions, headquartered in Texas, USA, we stand as a global powerhouse with over 5500+ dedicated professionals, catering to 300+ esteemed clients across…” Source: RevenueBase Database · checked Sep 27, 2026
25	CEI	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 27, 2026	501-1,000	1,391 contacts →
	Indirect evidence “In today’s technology-driven world, the mandate of transformation represents both challenges and opportunities.” 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 consulting and support 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 consulting and support companies.
Partial evidence: Its own public description names part of IT consulting and support companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT consulting and support 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 21,133 IT consulting and support companies based in the United States

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

As of Sep 27, 2026

27.9%Verified-email coverage

22.4%Mobile-number coverage

25.3Average contacts per company

1-10Median size (employees)

2.7%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

11,228

11-50

6,430

51-200

2,468

201-500

599

501-1,000

217

1,001-5,000

109

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

84,0210–30

57,81231–60

4,28261–90

10090–180

3,064180+

Company record updated

Median 90.0d

00–30

85,09231–60

180,98561–90

238,60390–180

29,560180+

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 consulting and support 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 consulting and support 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 consulting and support 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 consulting and support 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, 149,279 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 consulting and support 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 consulting and support 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 consulting and support companies are there based in the United States?

RevenueBase identified 21,133 IT consulting and support 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 consulting and support companies?

New York leads with 581 headquartered companies, followed by Houston (446) and Dallas (310).

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 149,279 verified decision-maker contacts tracked across these 21,133 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.