Company lists · Data refreshed September 2026

Top 25 Legacy system modernization companies based in Chennai, India

Name: Legacy system modernization companies based in Chennai, India
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 340 companies tracked

RevenueBase identified 340 legacy system modernization companies headquartered in Chennai, India as of September 2026 and tracks 13,974 professional contacts across them, including 1,647 with verified work emails. Hyderabad is the largest hub.

This list covers legacy system modernization companies headquartered in Chennai, India, 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.

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

340Companies

13,974Contacts tracked

1,647Verified emails

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The 25 largest legacy system modernization companies based in Chennai, India

Ranked by team size

Top 25 of 340 legacy system modernization companies based in Chennai, India, 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 companies: 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	Kaartech	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	1,001-5,000	2,525 contacts →
	Indirect evidence “We are a global leader in technology solutions, empowering businesses to thrive in a digital world through innovation, expertise, and unparalleled service.” Source: RevenueBase Database · checked Sep 20, 2026
2	4i Apps Solutions Cloud Solutions Provider	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	1,001-5,000	875 contacts →
	Indirect evidence “4i apps solutions is a leading AI-driven cloud consulting and digital transformation company, specializing in Oracle, Microsoft, and Salesforce technologies.” Source: RevenueBase Database · checked Sep 20, 2026
3	Colan Infotech Private Limited	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	501-1,000	739 contacts →
	Indirect evidence “Colan Infotech is among the 50 fastest growing companies” according to Silicon India and “The 50 best companies to work for” rated by Silicon Review.” Source: RevenueBase Database · checked Sep 20, 2026
4	Accel IT Services	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	1,001-5,000	711 contacts →
	Indirect evidence “Focused on Cloud Infrastructure, Enterprise Security, RPA, Managed Services and Training, Accel IT Services has evolved into a dependable and long-term digital transformation…” Source: RevenueBase Database · checked Sep 20, 2026
5	BCT Consulting	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	1,001-5,000	561 contacts →
	Indirect evidence “BCT Consulting, as affiliate company of Bahwan CyberTek, is a global leader in digital transformation products and services, offering reliable, innovative solutions that drive…” Source: RevenueBase Database · checked Sep 20, 2026
6	Doodleblue Innovations	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	501-1,000	542 contacts →
	Indirect evidence “With Digital Transformation being the need of the hour, we help businesses make significant and lasting improvements in the digital space.” Source: RevenueBase Database · checked Sep 20, 2026
7	Fourth Dimension Technologies	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	501-1,000	413 contacts →
	Indirect evidence “About Us 36+ Years of IT Infrastructure & Managed Services Expertise At Fourth Dimension Technologies (4DTech), we help organizations modernize, secure, and manage their IT…” Source: RevenueBase Database · checked Sep 20, 2026
8	Securekloud Technologies	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	201-500	284 contacts →
	Indirect evidence “17+ Years of Cloud, AI & SaaS Innovation Founded in 2008, SecureKloud is a publicly listed global technology company (NSE \| BSE), delivering AI, Automation, Cloud, SaaS, Managed…” Source: RevenueBase Database · checked Sep 20, 2026
9	Tekplay Systems Limited	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	501-1,000	282 contacts →
	Indirect evidence “Tekplay is a leading digital business transformation company.” Source: RevenueBase Database · checked Sep 20, 2026
10	Ennvee India	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	501-1,000	224 contacts →
	Indirect evidence “ennVee India (ennVee Solutions Pvt.” Source: RevenueBase Database · checked Sep 20, 2026
11	BU Soft Tech	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	201-500	194 contacts →
	Indirect evidence “BU SOFT TECH is a global technology services and digital engineering company helping organizations build, modernize, and scale with confidence.” Source: RevenueBase Database · checked Sep 20, 2026
12	Bics Global	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	51-200	180 contacts →
	Indirect evidence “We are recognized by clients as BICS GLOBAL, a global technology vendor with consistent top reviews, high ratings of 4.9, and 40% repeat business from customers.” Source: RevenueBase Database · checked Sep 20, 2026
13	Techaffinity	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	201-500	179 contacts →
	Indirect evidence “Founded in TechAffinity is a global software company with 25 years of proven expertise in building enterprise-grade solutions.” Source: RevenueBase Database · checked Sep 20, 2026
14	Truetech	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	51-200	152 contacts →
	Indirect evidence “With over 15 years of experience in the IT Services Industry catering to various Industries.” Source: RevenueBase Database · checked Sep 20, 2026
15	Viva IT India Savvysoft Technologies	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	501-1,000	144 contacts →
	Indirect evidence “VIVA-IT India is a Technology and IT consulting company based in Chennai, India.” Source: RevenueBase Database · checked Sep 20, 2026
16	Spinebiz	Partial evidence	Chennai, IndiaHQ checked Sep 20, 2026	501-1,000	127 contacts →
	Partial evidence “We are a trusted global technology outsourcing company and systems integrator combining deep technical expertise and industry experience to build digital transformation roadmaps…” Source: RevenueBase Database · checked Sep 20, 2026
17	Technorucs	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	51-200	91 contacts →
	Indirect evidence “About Us: TechnoRUCS is an innovative IT services firm specializing in delivering cutting-edge solutions tailored to meet diverse business needs across industries.” Source: RevenueBase Database · checked Sep 20, 2026
18	Quadruple Automation Services Private Limited	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	51-200	88 contacts →
	Indirect evidence “Quadruple Automation Services is a leading IT Services and Consulting firm with over a decade of expertise delivering innovative, technology-driven solutions to the global…” Source: RevenueBase Database · checked Sep 20, 2026
19	Aggrandize Venture	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	51-200	85 contacts →
	Indirect evidence “Aggrandize Venture is a leading Software Product & Services provider across the globe with over 8+ years of experience in Digital Transformation Solutions - Web & Mobile…” Source: RevenueBase Database · checked Sep 20, 2026
20	Technospurs	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	11-50	84 contacts →
	Indirect evidence “TechnoSpurs is an emerging digital technology company that provides end-to-end Product Engineering and Digital Transformation services to Fortune 500 companies and Silicon Valley…” Source: RevenueBase Database · checked Sep 20, 2026
21	Tdit Solution Private Limited	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	51-200	78 contacts →
	Indirect evidence “At TDIT Solution, we're dedicated to navigating the ever-evolving landscape of technology with precision and excellence.” Source: RevenueBase Database · checked Sep 20, 2026
22	Qeagle Assurance Private Limited	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	51-200	70 contacts →
	Indirect evidence “Qeagle is an AI-powered Quality Engineering and Test Automation company helping businesses release software faster, smarter, and with greater confidence.” Source: RevenueBase Database · checked Sep 20, 2026
23	Photon Infotech Private Limited	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	51-200	67 contacts →
	Indirect evidence “Photon Infotech Private Limited is an information technology and services company based out of Omr, Chennai, Tamil Nadu, India.” Source: RevenueBase Database · checked Sep 20, 2026
24	Kriyatec IT Systems Pvt. LTD	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	11-50	67 contacts →
	Indirect evidence “KriyaTec is enabling the Digital Transformation of enterprises across the world using niche technologies like IoT, AI, RPA, Blockchain.” Source: RevenueBase Database · checked Sep 20, 2026
25	Revolution Games Private Limited	Indirect evidence	Chennai, IndiaHQ checked Sep 20, 2026	51-200	66 contacts →
	Indirect evidence “Revolution Games Pvt.” 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 companies. 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 companies.
Partial evidence: Its own public description names part of legacy system modernization companies, 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 companies. 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 340 legacy system modernization companies based in Chennai, India

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Legacy system modernization companies based in Chennai, India at a glance

As of Sep 20, 2026

11.8%Verified-email coverage

41.1Average contacts per company

11-50Median size (employees)

168.8%Largest-city concentration · Hyderabad

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

153

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole India list rather than for Chennai, so it is reported there. Company counts and contact totals on this page are exact for Chennai, over 340 companies.

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 companies, 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.
What qualifies: Companies headquartered in Chennai, India whose own description of what they do matches “legacy system modernization companies”. 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 companies), 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 companies, and records with no verified work email. Companies headquartered outside Chennai are excluded even when they keep an office there.
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, 1,647 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 companies by metro in India

Legacy system modernization companies in Hyderabad574
Legacy system modernization companies in Pune551
Legacy system modernization companies in Noida429
Legacy system modernization companies in Bangalore405
Legacy system modernization companies in Chennai340
Legacy system modernization companies in Ahmedabad299
Legacy system modernization companies in Bengaluru289
Legacy system modernization companies in Mumbai274
Legacy system modernization companies in New Delhi219
Legacy system modernization companies in Jaipur148
Legacy system modernization companies in Indore140
Legacy system modernization companies in Gurugram128
Legacy system modernization companies in Kolkata126
Legacy system modernization companies in Delhi117
Legacy system modernization companies in Coimbatore101
Legacy system modernization companies in Surat97
Legacy system modernization companies in Gurgaon74
Legacy system modernization companies in Mohali65
Legacy system modernization companies in Navi Mumbai55
Legacy system modernization companies in Vadodara54
Legacy system modernization companies in Nagpur52
Legacy system modernization companies in Bhopal51
Legacy system modernization companies in Kochi50
Legacy system modernization companies in Lucknow50
Legacy system modernization companies in Bhubaneswar41
Legacy system modernization companies in Nashik35
Legacy system modernization companies in Chandigarh34
Legacy system modernization companies in Rajkot33
Legacy system modernization companies in Ghaziabad31
Legacy system modernization companies in Thane30
Legacy system modernization companies in Trivandrum30
Legacy system modernization companies in Madurai28

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 companies, 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 companies are there based in Chennai, India?

RevenueBase identified 340 legacy system modernization companies headquartered in Chennai, India 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?

Kaartech, headquartered in Chennai, tops this list with the largest team on record.

Which city has the most legacy system modernization companies?

Hyderabad leads with 574 headquartered companies, followed by Pune (551) and Noida (429).

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 1,647 verified decision-maker contacts tracked across these 340 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.