Company lists · Data refreshed September 2026

Top 25 Legacy system modernization consultancies based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 3,249 companies tracked

RevenueBase identified 3,249 company matches for legacy system modernization consultancies associated with the United States as of September 2026 and tracks 62,676 professional contacts across them, including 18,935 with verified work emails. New York is the largest hub.

This list covers company matches for legacy system modernization consultancies 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 September 28, 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 Sep 28, 2026 How this list was built

3,249Companies

62,676Contacts tracked

18,935Verified emails

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The 25 largest legacy system modernization consultancies based in the United States

Ranked by team size

Top 25 of 3,249 company matches for legacy system modernization consultancies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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	Ensono	Exact match	Downers Grove, IL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	3,247 contacts →
	Exact match “Ensono is an expert technology adviser and managed service provider.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Jade Global	Exact match	San Jose, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,872 contacts →
	Exact match “Jade Global is a premier consulting, integration, and managed services partner helping enterprises modernize, innovate, and scale.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Improving	Exact match	Plano, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,578 contacts →
	Exact match “Improving is a leading IT professional services firm committed to helping companies achieve lasting success through modern technology.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Hughes Systique Corporation HSC	Exact match	Rockville, MD, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,524 contacts →
	Exact match “Hughes Systique Corporation (HSC) is a global digital engineering and transformation partner enabling enterprises to modernize, innovate, and grow through its AI-First approach.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	CEI	Exact match	Pittsburgh, PA, United StatesHQ recorded Sep 28, 2026	501-1,000	1,391 contacts →
	Exact match “In today’s technology-driven world, the mandate of transformation represents both challenges and opportunities.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Royal Cyber INC	Exact match	Naperville, IL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,325 contacts →
	Exact match “Royal Cyber is a trusted global IT consulting & digital transformation partner, empowering enterprises for over two decades to evolve with agility, security, and innovation.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	galaxe.solutions	Exact match	Detroit, CT, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,186 contacts →
	Exact match “GalaxE, now Endava, is a leading global professional services company that specializes in platform-driven solutions and the use of automation to achieve core modernisation and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	programmers.io	Exact match	Dallas, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,056 contacts →
	Exact match “IBM i is evolving.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Xtglobal, INC	Exact match	Plano, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	841 contacts →
	Exact match “Founded in 1998, XTGlobal, Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Mobilecomm Professionals, INC	Exact match	Richardson, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	706 contacts →
	Exact match “MobileComm is now fully integrated with UST.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	NET At Work	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	201-500	679 contacts →
	Exact match “At Net at Work, we help organizations unleash the power of their business performance.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	The Select Group	Exact match	Raleigh, NC, United StatesHQ recorded Sep 28, 2026	1,001-5,000	651 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 · Sep 28, 2026 · View company records in RevenueBase
13	Srinsoft INC	Exact match	Boca Raton, FL, United StatesHQ recorded Sep 28, 2026	501-1,000	568 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 · Sep 28, 2026 · View company records in RevenueBase
14	Enterprise Solutions INC	Exact match	Warrenville, IL, United StatesHQ recorded Sep 28, 2026	501-1,000	540 contacts →
	Exact match “Enterprise Solutions, Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Growth Acceleration Partners	Exact match	Austin, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	507 contacts →
	Exact match “Growth Acceleration Partners is a consulting and technology services company.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Infolob	Exact match	Irving, TX, United StatesHQ recorded Sep 28, 2026	201-500	476 contacts →
	Exact match “INFOLOB is the enterprise AI & Data transformation partner that engineers intelligent foundations into autonomous operations.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Kastech Software Solutions Group	Exact match	Richmond, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	472 contacts →
	Exact match “Kastech Software Solutions Group, incorporated in 2007 and headquartered in Richmond, Texas, is a leading global IT services and consulting company delivering technology-driven…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Zoolatech	Exact match	Miami, FL, United StatesHQ recorded Sep 28, 2026	501-1,000	468 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 · Sep 28, 2026 · View company records in RevenueBase
19	Velosio	Exact match	Atlanta, GA, United StatesHQ recorded Sep 28, 2026	501-1,000	430 contacts →
	Exact match “Velosio is a leading Microsoft partner delivering business transformation through Microsoft Dynamics 365, Power Platform, Azure, and the broader Microsoft Cloud.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Softweb Solutions Inc.	Exact match	Plano, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	430 contacts →
	Exact match “When we look at the way enterprises operate today, we see a fundamental challenge.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Nihilent Technologies INC	Exact match	Roseville, MN, United StatesHQ recorded Sep 28, 2026	51-200	411 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Intone	Exact match	Iselin, NJ, United StatesHQ recorded Sep 28, 2026	501-1,000	411 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 · Sep 28, 2026 · View company records in RevenueBase
23	AIM Consulting Group	Exact match	Bellevue, WA, United StatesHQ recorded Sep 28, 2026	501-1,000	398 contacts →
	Exact match “AIM Consulting, an Addison Group company, is an award-winning industry leader in technology consulting and solutions delivery.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	United Techno	Exact match	Pleasanton, CA, United StatesHQ recorded Sep 28, 2026	201-500	372 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 · Sep 28, 2026 · View company records in RevenueBase
25	Charter Global	Exact match	Atlanta, GA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	360 contacts →
	Exact match “Charter Global drives IT innovation and advances business operations through a strategic combination of consulting, digital solutions, custom development, and skilled resources.” Recorded in the RevenueBase company graph · Sep 28, 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 modernization consultancies”. 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 25 of 3,249 legacy system modernization consultancies based in the United States

See the full list, filter by size, metro and specialty, and access 18,935 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Legacy system modernization consultancies based in the United States at a glance

As of Sep 28, 2026

30.2%Verified-email coverage

19.3Average contacts per company

11-50Median size (employees)

2.8%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,610

11-50

1,016

51-200

459

201-500

102

501-1,000

1,001-5,000

5,001-10,000

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 3,249 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 modernization consultancies” 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 18,935 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 September 28, 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 modernization consultancies 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 modernization consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many legacy system modernization consultancies are there based in the United States?

RevenueBase identified 3,249 company matches for legacy system modernization consultancies associated with the United States as of September 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?

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

Which city has the most legacy system modernization consultancies?

New York leads with 92 company records, followed by Houston (73) and Austin (60).

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 18,935 professional contacts with verified work emails tracked across these 3,249 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 September 28, 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.