Company lists · Data refreshed September 2026

Top 25 Legacy system modernization consultants worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 28,467 companies tracked

RevenueBase identified 28,467 legacy system modernization consultants worldwide as of September 2026 and tracks 487,746 professional contacts across them, including 126,502 with verified work emails. The United States is the largest market and London the largest hub.

This list covers legacy system modernization consultants worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026. Country and city lists for legacy system modernization consultants follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

28,467Companies

487,746Contacts tracked

126,502Verified emails

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The 25 largest legacy system modernization consultants worldwide

Ranked by team size

Top 25 of 28,467 legacy system modernization consultants worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to legacy system modernization consultants: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	DXC Technology	Partial evidence	Ashburn, VA, United StatesHQ checked Sep 20, 2026	10001+	82,768 contacts →
	Partial evidence “DXC Technology helps global companies run their mission-critical systems and operations while modernizing IT, optimizing data architectures, and ensuring security and scalability…” Source: RevenueBase Database · checked Sep 20, 2026
2	World Wide Technology	Indirect evidence	Maryland Heights, MO, United StatesHQ checked Sep 20, 2026	10001+	9,184 contacts →
	Indirect evidence “We are thinkers and doers.” Source: RevenueBase Database · checked Sep 20, 2026
3	Sonata Software	Partial evidence	Bangalore, IndiaHQ checked Sep 20, 2026	5,001-10,000	7,508 contacts →
	Partial evidence “Sonata Software Limited is a leading Modernization engineering company, headquartered in Bangalore.” Source: RevenueBase Database · checked Sep 20, 2026
4	SHI International Corp	Indirect evidence	Somerset, NJ, United StatesHQ checked Sep 20, 2026	5,001-10,000	6,734 contacts →
	Indirect evidence “Think of SHI as your personal technology concierge.” Source: RevenueBase Database · checked Sep 20, 2026
5	Software AG	Indirect evidence	Darmstadt, GermanyHQ checked Sep 20, 2026	n/a	4,127 contacts →
	Indirect evidence “Software AG has been helping enterprises run and evolve their core business applications for over 50 years.” Source: RevenueBase Database · checked Sep 20, 2026
6	Ensono	Indirect evidence	Downers Grove, IL, United StatesHQ checked Sep 20, 2026	1,001-5,000	3,247 contacts →
	Indirect evidence “Ensono is an expert technology adviser and managed service provider.” Source: RevenueBase Database · checked Sep 20, 2026
7	AHEAD	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,989 contacts →
	Indirect evidence “AHEAD accelerates strategy into execution by engineering integrated solutions across infrastructure, applications, data, and security.” Source: RevenueBase Database · checked Sep 20, 2026
8	Speridian Technologies	Indirect evidence	Albuquerque, NM, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,619 contacts →
	Indirect evidence “Speridian Technologies is a global consulting and technology services firm that helps enterprises and public sector organizations modernize operations, enhance customer experience…” Source: RevenueBase Database · checked Sep 20, 2026
9	Mitra Integrasi Informatika, PT	Indirect evidence	Jakarta, IndonesiaHQ checked Sep 20, 2026	1,001-5,000	2,517 contacts →
	Indirect evidence “Mitra Integrasi Informatika (“MII”), established in 1996 as a subsidiary of the publicly listed PT Metrodata Electronics, Tbk.” Source: RevenueBase Database · checked Sep 20, 2026
10	IT Group, INC	Indirect evidence	Quezon City, PhilippinesHQ checked Sep 20, 2026	n/a	2,238 contacts →
	Indirect evidence “IT Group, Inc.(also known as ITG), is an Information Technology solutions partner that endeavors to provide growing organizations with solutions that meet the unique needs of…” Source: RevenueBase Database · checked Sep 20, 2026
11	GFI World	Indirect evidence	Saint-ouen, FranceHQ checked Sep 20, 2026	10001+	2,169 contacts →
	Indirect evidence “Gfi became Inetum in 2020.” Source: RevenueBase Database · checked Sep 20, 2026
12	Jade Global	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,872 contacts →
	Indirect evidence “Jade Global is a premier consulting, integration, and managed services partner helping enterprises modernize, innovate, and scale.” Source: RevenueBase Database · checked Sep 20, 2026
13	Fincons Group	Partial evidence	Vimercate, ItalyHQ checked Sep 20, 2026	1,001-5,000	1,870 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 20, 2026
14	Infotel	Indirect evidence	Neuilly-sur-seine, FranceHQ checked Sep 20, 2026	1,001-5,000	1,735 contacts →
	Indirect evidence “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.).” Source: RevenueBase Database · checked Sep 20, 2026
15	Quadrant Technologies	Indirect evidence	Redmond, WA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,664 contacts →
	Indirect evidence “Quadrant Technologies: Your Go-to IT Services Partner for a Digital Future For over a decade, Quadrant Technologies has established itself as a trailblazer in the IT services…” Source: RevenueBase Database · checked Sep 20, 2026
16	Future Focus Infotech Private Limited	Indirect evidence	Sharjah, JapanHQ checked Sep 20, 2026	1,001-5,000	1,608 contacts →
	Indirect evidence “Enabling Your Digital Future Future Focus Infotech (FFI) is your strategic partner for transformative digital solutions and IT consulting.” Source: RevenueBase Database · checked Sep 20, 2026
17	Improving	Indirect evidence	Plano, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,578 contacts →
	Indirect evidence “Improving is a leading IT professional services firm committed to helping companies achieve lasting success through modern technology.” Source: RevenueBase Database · checked Sep 20, 2026
18	Searce INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,511 contacts →
	Partial evidence “Searce is an AI-native, engineering-led modern tech consultancy that empowers clients to futurify by delivering real business outcomes.” Source: RevenueBase Database · checked Sep 20, 2026
19	LEVIO	Partial evidence	Québec, QC, CanadaHQ checked Sep 20, 2026	1,001-5,000	1,403 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
20	Prodware	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	1,001-5,000	1,394 contacts →
	Indirect evidence “At Prodware, we believe that Trust, Audacity, and Passion are the driving forces behind meaningful digital transformation.” Source: RevenueBase Database · checked Sep 20, 2026
21	CEI	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 20, 2026	501-1,000	1,391 contacts →
	Indirect evidence “In today’s technology-driven world, the mandate of transformation represents both challenges and opportunities.” Source: RevenueBase Database · checked Sep 20, 2026
22	Royal Cyber INC	Indirect evidence	Naperville, IL, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,325 contacts →
	Indirect evidence “Royal Cyber is a trusted global IT consulting & digital transformation partner, empowering enterprises for over two decades to evolve with agility, security, and innovation.” Source: RevenueBase Database · checked Sep 20, 2026
23	Trigyn Technologies	Indirect evidence	Mumbai, IndiaHQ checked Sep 20, 2026	1,001-5,000	1,230 contacts →
	Indirect evidence “We're re-engineering the way business is done.” Source: RevenueBase Database · checked Sep 20, 2026
24	V-Soft Consulting Group, INC	Indirect evidence	Louisville, KY, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,221 contacts →
	Indirect evidence “V-Soft Consulting, an innovative corporation specializing in Information Technology consulting; including staffing, digital, and infrastructure solutions.” Source: RevenueBase Database · checked Sep 20, 2026
25	Kumaran Systems	Strong evidence	Chennai, IndiaHQ checked Sep 20, 2026	1,001-5,000	1,219 contacts →
	Strong evidence “Kumaran Systems: Engineering Future-Ready Transformations Since 1992, Kumaran Systems has been helping enterprises bridge the past and the future, reimagining legacy systems and…” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: legacy system modernization consultants. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names legacy system modernization consultants.
Partial evidence: Its own public description names part of legacy system modernization consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name legacy system modernization consultants. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 28,467 legacy system modernization consultants worldwide

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Legacy system modernization consultants worldwide at a glance

As of Sep 20, 2026

25.9%Verified-email coverage

17.1Average contacts per company

1-10Median size (employees)

1.3%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

15,604

11-50

8,921

51-200

2,904

201-500

616

501-1,000

188

1,001-5,000

114

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among legacy system modernization consultants, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for legacy system modernization consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “legacy system modernization consultants”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names legacy system modernization consultants), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among legacy system modernization consultants, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 126,502 across the full list. 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 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Legacy system modernization consultants by location

132 lists · largest first

Every Legacy system modernization consultants 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 Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names legacy system modernization consultants, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many legacy system modernization consultants are there worldwide?

RevenueBase identified 28,467 legacy system modernization consultants worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

DXC Technology, headquartered in Ashburn, tops this list with the largest team on record.

Which country has the most legacy system modernization consultants?

The United States leads with 6,336 companies, followed by India (3,158) and Brazil (1,093). Every legacy system modernization consultants list by country and city is linked on this page.

Which city has the most legacy system modernization consultants?

London leads with 377 headquartered companies, followed by Hyderabad (338) and Sao Paulo (310).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 126,502 verified decision-maker contacts tracked across these 28,467 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 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 Smart Search, 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.