Company lists · Data refreshed November 2026

Top 25 Legacy system integration companies worldwide

Name: Legacy system integration companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 9,668 companies tracked

RevenueBase identified 9,668 company matches for legacy system integration companies worldwide as of November 2026 and tracks 357,082 professional contacts across them, including 96,330 with verified work emails. The United States is the largest market and Hyderabad the largest hub.

This list covers company matches for legacy system integration companies worldwide, 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. Country and city lists for legacy system integration companies follow the table.

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

9,668Companies

357,082Contacts tracked

96,330Verified emails

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The 25 largest legacy system integration companies worldwide

Ranked by team size

Top 25 of 9,668 company matches for legacy system integration companies worldwide, 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	NTT Data	Exact match	Tokyo, JapanHQ recorded Nov 6, 2026	10001+	42,145 contacts →
	Exact match “NTT DATA – a part of NTT Group – IT and business services headquartered in Tokyo.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Software AG	Exact match	Darmstadt, GermanyHQ recorded Nov 6, 2026	n/a	4,213 contacts →
	Exact match “Software AG has been helping enterprises run and evolve their core business applications for over 50 years.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	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
5	Hitachi Digital Services	Exact match	Santa Clara, United StatesHQ recorded Nov 6, 2026	5,001-10,000	3,232 contacts →
	Exact match “Hitachi Digital Services, a wholly owned subsidiary of Hitachi, Ltd, is a global systems integrator powering mission-critical platforms with people and technology.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	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
7	Speridian Technologies	Exact match	Albuquerque, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,668 contacts →
	Exact match “Speridian Technologies is a global consulting and technology services firm that helps enterprises and public sector organizations modernize operations, enhance customer experience…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	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
9	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
10	Fincons Group	Exact match	Vimercate, ItalyHQ recorded Nov 6, 2026	1,001-5,000	1,932 contacts →
	Exact match “With more than 40 years of experience in IT Business Consulting and System Integration, Fincons Group partners with clients to support business growth through innovation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Infotel	Exact match	Neuilly-sur-seine, FranceHQ recorded Nov 6, 2026	1,001-5,000	1,842 contacts →
	Exact match “Infotel accompagne les directions Informatiques et Métiers des grandes entreprises depuis 45 ans (Airbus, Air France, PSA, BNP Paribas, Banque de France ou encore BPCE, etc.).” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Consort Group	Exact match	Paris, FranceHQ recorded Nov 6, 2026	1,001-5,000	1,758 contacts →
	Exact match “Acteur de référence des systèmes d’information augmentés par l’intégration stratégique de la data, Consort Group accompagne les entreprises pour leur permettre de valoriser ce…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Improving	Exact match	Plano, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,673 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 · Nov 6, 2026 · View company records in RevenueBase
14	Malamteam	Exact match	Petach Tikva, IsraelHQ recorded Nov 6, 2026	5,001-10,000	1,643 contacts →
	Exact match “As Israel's premier IT services powerhouse, Malam Team stands at the forefront of technological innovation, redefining the landscape of information technology with unparalleled…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Nava Tech For Business	Exact match	Barueri, BrazilHQ recorded Nov 6, 2026	1,001-5,000	1,588 contacts →
	Exact match “Atuamos no core de empresas líderes em seus segmentos, onde tecnologia, estratégia e operação se encontram.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	MSG Global Solutions	Exact match	Zurich, SwitzerlandHQ recorded Nov 6, 2026	1,001-5,000	1,546 contacts →
	Exact match “msg global solutions is a systems integrator, product innovator, and strategic partner with a special focus on enterprise software and services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	SICE	Exact match	Alcobendas, SpainHQ recorded Nov 6, 2026	1,001-5,000	1,450 contacts →
	Exact match “Sociedad Ibérica de Construcciones Eléctricas (SICE) is a multinational company integrating systems, aimed at solving market needs.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	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
19	Kumaran Systems	Exact match	Chennai, CA, IndiaHQ recorded Nov 6, 2026	1,001-5,000	1,388 contacts →
	Exact match “Kumaran Systems: Engineering Future-Ready Transformations Since 1992, Kumaran Systems has been helping enterprises bridge the past and the future, reimagining legacy systems and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Royal Cyber INC	Exact match	Naperville, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,373 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 · Nov 6, 2026 · View company records in RevenueBase
21	LEVIO	Exact match	Québec, PE, CanadaHQ recorded Nov 6, 2026	1,001-5,000	1,371 contacts →
	Exact match “Levio is a leading North American technology‑focused consulting firm and one of the two largest system integrators fully owned by Canadian interests, specializing in digital…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	SNP Group	Exact match	Heidelberg, GermanyHQ recorded Nov 6, 2026	1,001-5,000	1,349 contacts →
	Exact match “SNP is the global technology platform leader and trusted partner for companies seeking unparalleled data-enabled transformation capabilities and business agility.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Chain-Sys Corporation	Exact match	Rocklin, United StatesHQ recorded Nov 6, 2026	501-1,000	1,343 contacts →
	Exact match “ChainSys is an innovator in the data management and business platform implementation (ERP) space.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	BBD	Exact match	Rosebank, South AfricaHQ recorded Nov 6, 2026	1,001-5,000	1,229 contacts →
	Exact match “Welcome to BBD – where experience, innovation and software engineering excellence come together.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	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

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 25 of 9,668 legacy system integration companies worldwide

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Legacy system integration companies worldwide at a glance

As of Nov 6, 2026

27.0%Verified-email coverage

36.9Average contacts per company

11-50Median size (employees)

1.7%Largest-city concentration · Hyderabad

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

4,029

11-50

3,547

51-200

1,447

201-500

368

501-1,000

112

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for legacy system integration companies are linked below.
What qualifies: Company records worldwide 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. 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 96,330 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 location

80 lists · largest first

Every Legacy system integration companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 worldwide?

RevenueBase identified 9,668 company matches for legacy system integration companies worldwide 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 country has the most legacy system integration companies?

The United States leads with 2,127 companies, followed by India (1,163) and the United Kingdom (322). Every legacy system integration companies list by country and city is linked on this page.

Which city has the most legacy system integration companies?

Hyderabad leads with 166 company records, followed by Bangalore (125) and London (101).

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 96,330 professional contacts with verified work emails tracked across these 9,668 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.