Company lists · Data refreshed November 2026

Top 25 Legacy system integration developers worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 7,506 companies tracked

RevenueBase identified 7,506 company matches for legacy system integration developers worldwide as of November 2026 and tracks 189,851 professional contacts across them, including 48,663 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 developers 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 developers 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

7,506Companies

189,851Contacts tracked

48,663Verified emails

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The 25 largest legacy system integration developers worldwide

Ranked by team size

Top 25 of 7,506 company matches for legacy system integration developers 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	Mphasis	Exact match	Bangalore, IndiaHQ recorded Nov 6, 2026	10001+	46,102 contacts →
	Exact match “A leading applied technology services company, we innovate to deliver service excellence and successful outcomes across sales, delivery and development.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	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
3	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
4	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
5	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	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
14	Tanisha Systems, INC	Exact match	Boston, NY, United StatesHQ recorded Nov 6, 2026	1,001-5,000	889 contacts →
	Exact match “Tanisha Systems, founded in 2002 in Massachusetts-USA, is a leading provider of Custom Application Development and end-to-end IT Services to clients globally.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Xtglobal, INC	Exact match	Plano, United StatesHQ recorded Nov 6, 2026	501-1,000	886 contacts →
	Exact match “Founded in 1998, XTGlobal, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Seeburger	Exact match	Bretten, GermanyHQ recorded Nov 6, 2026	1,001-5,000	784 contacts →
	Exact match “One central platform.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Radixweb	Exact match	Ahmedabad, IndiaHQ recorded Nov 6, 2026	501-1,000	759 contacts →
	Exact match “A global software engineering company with 26+ years of experience helping enterprises build, modernize, and scale complex digital systems.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Hidden Brains Infotech	Exact match	Ahmedabad, IndiaHQ recorded Nov 6, 2026	501-1,000	743 contacts →
	Exact match “Hidden Brains InfoTech is CMMI Level 3 Enterprise Software Development & IT Consulting Company with a focus on digital transformation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Codeclouds	Exact match	Wellington, New ZealandHQ recorded Nov 6, 2026	501-1,000	727 contacts →
	Exact match “CodeClouds specializes in delivering scalable, robust solutions for modern businesses of all sizes including enterprise clients.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Value Point Systems PVT LTD	Exact match	Bangalore, IndiaHQ recorded Nov 6, 2026	1,001-5,000	720 contacts →
	Exact match “Value Point Systems, one of the leading Digital Systems & Services Integrator company in South Asia.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Node4	Exact match	Derby, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	714 contacts →
	Exact match “Node4 helps businesses achieve more with secure, AI‑powered cloud and managed service platforms.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Ahana Systems And Solutions Pvt. LTD	Exact match	Bangalore, NY, IndiaHQ recorded Nov 6, 2026	501-1,000	678 contacts →
	Exact match “Fifteen years ago, Ahana began with a simple belief: technology should enable growth, not create complexity.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Ctc- Global SDN BHD	Exact match	Petaling Jaya, MalaysiaHQ recorded Nov 6, 2026	501-1,000	673 contacts →
	Exact match “CTC Global Sdn Bhd (CTC Malaysia) is a wholly owned subsidiary of ITOCHU Techno-Solutions Corporation (CTC) and ITOCHU Corporation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Preludesys	Exact match	Irvine, United StatesHQ recorded Nov 6, 2026	501-1,000	646 contacts →
	Exact match “PreludeSys is now LevelShift.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Logicalis Spain	Exact match	Barcelona, SpainHQ recorded Nov 6, 2026	501-1,000	598 contacts →
	Exact match “Logicalis es una compañía de referencia tanto en España como en los países en los que opera.” 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 developers”. 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 7,506 legacy system integration developers worldwide

See the full list, filter by size, metro and specialty, and access 48,663 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Legacy system integration developers worldwide at a glance

As of Nov 6, 2026

25.6%Verified-email coverage

25.3Average contacts per company

11-50Median size (employees)

1.3%Largest-city concentration · Hyderabad

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

3,525

11-50

2,659

51-200

946

201-500

206

501-1,000

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 developers are linked below.
What qualifies: Company records worldwide whose business descriptions match “legacy system integration developers” 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 48,663 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 developers by location

62 lists · largest first

Every Legacy system integration developers 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 developers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many legacy system integration developers are there worldwide?

RevenueBase identified 7,506 company matches for legacy system integration developers 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?

Mphasis 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 developers?

The United States leads with 1,448 companies, followed by India (931) and Brazil (297). Every legacy system integration developers list by country and city is linked on this page.

Which city has the most legacy system integration developers?

Hyderabad leads with 101 company records, followed by Bangalore (95) and London (89).

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 48,663 professional contacts with verified work emails tracked across these 7,506 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.