Company lists · Data refreshed November 2026

Top 24 Legacy system integration companies based in the United States

Name: Legacy system integration companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 2,127 companies tracked

RevenueBase identified 2,127 company matches for legacy system integration companies associated with the United States as of November 2026 and tracks 146,011 professional contacts across them, including 46,499 with verified work emails. New York is the largest hub.

This list covers company matches for legacy system integration companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

2,127Companies

146,011Contacts tracked

46,499Verified emails

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The 24 largest legacy system integration companies based in the United States

Ranked by team size

Top 24 of 2,127 company matches for legacy system integration companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	DXC Technology	Exact match	Ashburn, VA, United StatesHQ recorded Nov 6, 2026	10001+	86,844 contacts →
	Exact match “DXC Technology helps global companies run their mission-critical systems and operations while modernizing IT, optimizing data architectures, and ensuring security and scalability…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Ensono	Exact match	Downers Grove, IL, United StatesHQ recorded Nov 6, 2026	1,001-5,000	3,542 contacts →
	Exact match “Ensono is an expert technology adviser and managed service provider.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	BOOMI	Exact match	Conshohocken, PA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,725 contacts →
	Exact match “Connect everything to achieve anything™ #TeamBoomi” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	People Tech Group INC	Exact match	Redmond, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,226 contacts →
	Exact match “People Tech Group is a leading Enterprise Solutions, Digital Transformation, Data Intelligence, and Modern Operation services provider.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Jade Global	Exact match	San Jose, UT, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,978 contacts →
	Exact match “Jade Global is a leading AI native digital transformation company enabling enterprises become AI ready by optimizing operations and accelerating business outcomes through…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Trace3	Exact match	Irvine, MI, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,431 contacts →
	Exact match “Trace3 delivers business transformation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	programmers.io	Exact match	Dallas, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,063 contacts →
	Exact match “IBM i is evolving.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	CEI	Exact match	Pittsburgh, PA, United StatesHQ recorded Nov 6, 2026	501-1,000	1,042 contacts →
	Exact match “In today’s technology-driven world, the mandate of transformation represents both challenges and opportunities.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	NET At Work	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	201-500	763 contacts →
	Exact match “At Net at Work, we help organizations unleash the power of their business performance.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	The Select Group	Exact match	Raleigh, NC, United StatesHQ recorded Nov 6, 2026	1,001-5,000	706 contacts →
	Exact match “TSG is a technology consulting and services partner that helps organizations move faster, operate smarter, and extract greater value from technology investments in rapidly…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Srinsoft INC	Exact match	Boca Raton, FL, United StatesHQ recorded Nov 6, 2026	501-1,000	603 contacts →
	Exact match “SrinSoft is a leading IT consulting & engineering firm specializing in digital transformation, software development, and engineering solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Fluxtek Solutions INC	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	501-1,000	527 contacts →
	Exact match “Fluxtek Solutions Inc has established a track record as a leading fast growing IT consulting, services, and outsourcing firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Zoolatech	Exact match	Miami, FL, United StatesHQ recorded Nov 6, 2026	501-1,000	493 contacts →
	Exact match “Zoolatech is a global software engineering partner helping enterprises modernize legacy systems, adopt AI, and build scalable digital platforms.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Technology Integration Group	Exact match	San Diego, GA, United StatesHQ recorded Nov 6, 2026	201-500	480 contacts →
	Exact match “Our Mission: TIG will earn its place as a trusted partner to our clients, providing only the highest level of service, value and advanced technology to power their strategic…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Object Computing, INC	Exact match	St. Louis, MO, United StatesHQ recorded Nov 6, 2026	201-500	448 contacts →
	Exact match “We engineer the systems that power your business.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Softweb Solutions Inc.	Exact match	Plano, TX, United StatesHQ recorded Nov 6, 2026	501-1,000	432 contacts →
	Exact match “When we look at the way enterprises operate today, we see a fundamental challenge.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Intone	Exact match	Iselin, TX, United StatesHQ recorded Nov 6, 2026	501-1,000	414 contacts →
	Exact match “Incorporated in the year 2003 at New Jersey, USA, Intone Networks Inc.(Intone) is an ISO 27001:2013 and 9001:2015 certified leading IT consulting firm, specializing on IT…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Viva USA INC	Exact match	Rolling Meadows, IL, United StatesHQ recorded Nov 6, 2026	501-1,000	403 contacts →
	Exact match “VIVA USA Inc.(VIVA), certified Woman and Minority Owned, is a Technology and IT consulting company based in the greater Chicago area.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Myriad360	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	501-1,000	396 contacts →
	Exact match “Technology holds infinite potential for your business.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	United Techno	Exact match	Pleasanton, FL, United StatesHQ recorded Nov 6, 2026	201-500	386 contacts →
	Exact match “At United Techno, we harness experience and collaboration to address customer challenges and devise intuitive solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Njvc-Llc	Exact match	Lorton, VA, United StatesHQ recorded Nov 6, 2026	201-500	380 contacts →
	Exact match “NJVC® provides customers with innovative solutions to critical mission, business and technology challenges.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Groundswell	Exact match	Mclean, VA, United StatesHQ recorded Nov 6, 2026	201-500	372 contacts →
	Exact match “Groundswell is a specialized, highly agile systems integrator delivering advanced technology solutions as a trusted mission partner to federal agencies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Bailiwick, An Eplus Technology, Inc. Company	Exact match	Chaska, MN, United StatesHQ recorded Nov 6, 2026	201-500	345 contacts →
	Exact match “As a partner to some of the world’s largest companies, Bailiwick provides professionally managed technology integration and IT expertise for complex, large-scale IT initiatives.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Sira Consulting, An INC 5000 Company	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	201-500	336 contacts →
	Exact match “SiRA Consulting is a Certified MBE consulting company that was founded in 2012.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “legacy system integration companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 24 of 2,127 legacy system integration companies based in the United States

See the full list, filter by size, metro and specialty, and access 46,499 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Legacy system integration companies based in the United States at a glance

As of Nov 6, 2026

31.8%Verified-email coverage

68.6Average contacts per company

11-50Median size (employees)

2.8%Largest-city concentration · New York

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

857

11-50

698

51-200

394

201-500

102

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 2,127 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “legacy system integration companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 46,499 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Legacy system integration companies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “legacy system integration companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many legacy system integration companies are there based in the United States?

RevenueBase identified 2,127 company matches for legacy system integration companies associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

DXC Technology tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most legacy system integration companies?

New York leads with 59 company records, followed by Houston (57) and Dallas (45).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 46,499 professional contacts with verified work emails tracked across these 2,127 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.