Company lists · Data refreshed September 2026

Top 25 Legacy system modernization companies based in Kolkata, India

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 126 companies tracked

RevenueBase identified 126 legacy system modernization companies headquartered in Kolkata, India as of September 2026 and tracks 3,094 professional contacts across them, including 738 with verified work emails. Hyderabad is the largest hub.

This list covers legacy system modernization companies headquartered in Kolkata, 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

126Companies

3,094Contacts tracked

738Verified emails

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

Ranked by team size

Top 25 of 126 legacy system modernization companies based in Kolkata, 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	Indus NET Technologies INT	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	501-1,000	1,066 contacts →
	Indirect evidence “For nearly three decades, Indus Net Technologies (INT.) has empowered global enterprises to build intelligent, secure, and scalable digital ecosystems -> transforming complexity…” Source: RevenueBase Database · checked Sep 20, 2026
2	Vareli Tecnac Pvt. LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	51-200	227 contacts →
	Indirect evidence “As one of the growing digital transformation companies, Vareli Tecnac Pvt.” Source: RevenueBase Database · checked Sep 20, 2026
3	LEE & NEE Softwares Exports LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	51-200	198 contacts →
	Indirect evidence “LNSEL is a trusted leader in the field of digital transformation with over 36 years of experience.” Source: RevenueBase Database · checked Sep 20, 2026
4	SGN Software Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	201-500	153 contacts →
	Indirect evidence “SGN Software, a SAP Gold Partner, is an IT company that has been helping customers with their digital transformation now for more than 13+ years.” Source: RevenueBase Database · checked Sep 20, 2026
5	Innoraft	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	51-200	145 contacts →
	Indirect evidence “Innoraft is a digital engineering partner that helps enterprises build, modernize, and evolve large-scale digital platforms.” Source: RevenueBase Database · checked Sep 20, 2026
6	Sundew	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	51-200	131 contacts →
	Indirect evidence “Sundew is a digital transformation and consulting company helping global enterprises with design and emerging technologies to discover and create new opportunities through…” Source: RevenueBase Database · checked Sep 20, 2026
7	Simpsoft Solutions	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	51-200	97 contacts →
	Indirect evidence “Simpsoft Solutions is an India and USA-based information technology (IT) services, product development, and staff augmentation company.” Source: RevenueBase Database · checked Sep 20, 2026
8	Webstep	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	51-200	70 contacts →
	Indirect evidence “Webstep is a global digital engineering and consulting company helping businesses, governments, and institutions build technology that drives meaningful outcomes.” Source: RevenueBase Database · checked Sep 20, 2026
9	Maxbridge Solution LLP	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	66 contacts →
	Indirect evidence “First of all let us take the opportunity to introduce Maxbridge Solutions.” Source: RevenueBase Database · checked Sep 20, 2026
10	Achievex Solutions Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	51-200	59 contacts →
	Indirect evidence “AchieveX Solutions is a new-age company under the Startup India flagship that solely believes in entrenching innovation to your ideas and turning them into reality.” Source: RevenueBase Database · checked Sep 20, 2026
11	Surelia Infosystems Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	44 contacts →
	Indirect evidence “In today's world, when businesses are becoming more and more dependent on technology to remain relevant and competitive in the market, many businesses are challenged by complexity…” Source: RevenueBase Database · checked Sep 20, 2026
12	Euphoria Infotech India Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	51-200	43 contacts →
	Indirect evidence “For Euphoria, “TECH IT EASY” is not just a tag line – it’s reflects our approach to each of our engagements.” Source: RevenueBase Database · checked Sep 20, 2026
13	ADA Software RE Engineering Services Pvt. LTD	Strong evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	39 contacts →
	Strong evidence “Over the years ADA Software has developed its expertise in the re-engineering and modernization of legacy application software and has delivered projects involving large and…” Source: RevenueBase Database · checked Sep 20, 2026
14	The Tech Clouds TTC	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	37 contacts →
	Indirect evidence “At The Tech Clouds, we specialize in transforming business landscapes through innovative it solutions.” Source: RevenueBase Database · checked Sep 20, 2026
15	Alphaxine	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	51-200	22 contacts →
	Indirect evidence “Alphaxine Solutions Private Limited, founded in 2019 in Kolkata, began as an IT services firm specializing in SAP services for global clients.” Source: RevenueBase Database · checked Sep 20, 2026
16	Kalkey	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	20 contacts →
	Indirect evidence “We are the top notch software training institute where we provide the live project to practice for industrial level job role courses.” Source: RevenueBase Database · checked Sep 20, 2026
17	Techwala IT Consultants LLP	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	18 contacts →
	Indirect evidence “We are a team of highly skilled professionals who have worked in multi-disciplinary business environments in India and abroad to facilitate constructive digital transformation.” Source: RevenueBase Database · checked Sep 20, 2026
18	Wift CAP Solutions PVT LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	51-200	18 contacts →
	Indirect evidence “Wift Cap Solutions Pvt Ltd is a software services company based in Kolkata, India.” Source: RevenueBase Database · checked Sep 20, 2026
19	Dharma.H Software Technologies Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	11 contacts →
	Indirect evidence “At dharma.h, we believe in value creation through innovation.” Source: RevenueBase Database · checked Sep 20, 2026
20	Cogenerate Technologies	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	10 contacts →
	Indirect evidence “Cogenerate Technologies is a Digital Transformation Consultant and Service Provider with its presence in Asia-Pacific region, backed by a group of enthusiast and creative…” Source: RevenueBase Database · checked Sep 20, 2026
21	Meshwork Technology Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence “Meshwork Technology, is a leading IT service provider of software development, digital marketing, mobile application, web development and website design services.” Source: RevenueBase Database · checked Sep 20, 2026
22	Rishfotech Solutions	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence “Since 2019, Rishfotech has been delivering enterprise-grade technology solutions that power digital transformation.” Source: RevenueBase Database · checked Sep 20, 2026
23	Neonate Technologies	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	8 contacts →
	Indirect evidence “We work hard to create, perform, deliver, plan, and transform your business as we contribute to the development of the new digital world.” Source: RevenueBase Database · checked Sep 20, 2026
24	Pixelvise	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	6 contacts →
	Indirect evidence “Pixelvise is a Technology, AI & Digital Transformation Partner helping businesses modernize, scale and compete in an increasingly digital world.” Source: RevenueBase Database · checked Sep 20, 2026
25	WIZ Digital	Indirect evidence	Kolkata, IndiaHQ checked Sep 20, 2026	11-50	5 contacts →
	Indirect evidence “We are a Digital Transformation company with capabilities in Analytics, Master Data Management, Integration and Engineering.” 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 126 legacy system modernization companies based in Kolkata, India

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

As of Sep 20, 2026

23.9%Verified-email coverage

24.6Average contacts per company

11-50Median size (employees)

455.6%Largest-city concentration · Hyderabad

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole India list rather than for Kolkata, so it is reported there. Company counts and contact totals on this page are exact for Kolkata, over 126 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 Kolkata, 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 Kolkata 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, 738 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 Kolkata, India?

RevenueBase identified 126 legacy system modernization companies headquartered in Kolkata, 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?

Indus NET Technologies INT, headquartered in Kolkata, 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 738 verified decision-maker contacts tracked across these 126 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.