Company lists · Data refreshed September 2026

Top 25 Legacy system modernization consultancies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 14,502 companies tracked

RevenueBase identified 14,502 company matches for legacy system modernization consultancies worldwide as of September 2026 and tracks 183,528 professional contacts across them, including 45,031 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for legacy system modernization consultancies 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 September 28, 2026. Country and city lists for legacy system modernization consultancies 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 Sep 28, 2026 How this list was built

14,502Companies

183,528Contacts tracked

45,031Verified emails

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The 25 largest legacy system modernization consultancies worldwide

Ranked by team size

Top 25 of 14,502 company matches for legacy system modernization consultancies worldwide, 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	Sonata Software	Exact match	Bangalore, IndiaHQ recorded Sep 28, 2026	5,001-10,000	7,508 contacts →
	Exact match “Sonata Software Limited is a leading Modernization engineering company, headquartered in Bangalore.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Software AG	Exact match	Darmstadt, GermanyHQ recorded Sep 28, 2026	n/a	4,127 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 · Sep 28, 2026 · View company records in RevenueBase
3	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
4	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
5	Infotel	Exact match	Neuilly-sur-seine, FranceHQ recorded Sep 28, 2026	1,001-5,000	1,735 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 · Sep 28, 2026 · View company records in RevenueBase
6	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
7	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
8	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
9	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
10	Kumaran Systems	Exact match	Chennai, IndiaHQ recorded Sep 28, 2026	1,001-5,000	1,219 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 · Sep 28, 2026 · View company records in RevenueBase
11	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
12	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
13	Capitole	Exact match	Barcelona, FranceHQ recorded Sep 28, 2026	1,001-5,000	1,009 contacts →
	Exact match “Who are we?” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Integra Micro Software Services	Exact match	Bangalore, IndiaHQ recorded Sep 28, 2026	1,001-5,000	907 contacts →
	Exact match “Are you ready to unlock the full potential of your business?” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	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
16	NUMEN	Exact match	Sao Paulo, BrazilHQ recorded Sep 28, 2026	501-1,000	828 contacts →
	Exact match “Numen is an international consultancy specialized in enterprise technologies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	People Prime Worldwide	Exact match	Hyderabad, IndiaHQ recorded Sep 28, 2026	501-1,000	806 contacts →
	Exact match “At People Prime Worldwide, we deliver innovative IT solutions that drive business success.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Radixweb	Exact match	Ahmedabad, IndiaHQ recorded Sep 28, 2026	501-1,000	754 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 · Sep 28, 2026 · View company records in RevenueBase
19	Foray Software Private Limited	Exact match	Hyderabad, IndiaHQ recorded Sep 28, 2026	n/a	740 contacts →
	Exact match “Innorev Technologies Pvt Ltd is a leading IT consulting and services firm offering the right blend of technology and skill-set to organizations across industries.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Hidden Brains Infotech	Exact match	Ahmedabad, IndiaHQ recorded Sep 28, 2026	501-1,000	731 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 · Sep 28, 2026 · View company records in RevenueBase
21	Intergrupo	Exact match	Sabaneta, ColombiaHQ recorded Sep 28, 2026	1,001-5,000	728 contacts →
	Exact match “Established in 1995, InterGrupo is one of Latin America's leading IT Consulting Services Provider.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	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
23	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
24	CAT Technologies LTD	Exact match	Hyd, IndiaHQ recorded Sep 28, 2026	201-500	660 contacts →
	Exact match “CAT Technology Inc, established in October is engaged in providing quality consulting services in Systems Analysis, System Design, Database Administration, Systems Engineering…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	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

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 14,502 legacy system modernization consultancies worldwide

See the full list, filter by size, metro and specialty, and access 45,031 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Legacy system modernization consultancies worldwide at a glance

As of Sep 28, 2026

24.5%Verified-email coverage

12.7Average contacts per company

1-10Median size (employees)

1.5%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

8,309

11-50

4,338

51-200

1,362

201-500

297

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 modernization consultancies are linked below.
What qualifies: Company records worldwide 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. 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 45,031 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 location

93 lists · largest first

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

How many legacy system modernization consultancies are there worldwide?

RevenueBase identified 14,502 company matches for legacy system modernization consultancies worldwide 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?

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

Which country has the most legacy system modernization consultancies?

The United States leads with 3,249 companies, followed by India (1,483) and Germany (594). Every legacy system modernization consultancies list by country and city is linked on this page.

Which city has the most legacy system modernization consultancies?

London leads with 219 company records, followed by Hyderabad (152) and Sao Paulo (140).

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 45,031 professional contacts with verified work emails tracked across these 14,502 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.