Company lists · Data refreshed September 2026

Top 25 B2B tech companies based in Kolkata, India

Name: B2B tech companies based in Kolkata, India
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 161 companies tracked

RevenueBase identified 161 B2B tech companies headquartered in Kolkata, India as of September 2026 and tracks 2,565 professional contacts across them, including 466 with verified work emails. Pune is the largest hub.

This list covers B2B tech 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 19, 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 19, 2026 86% judged on-target in blind review

161Companies

2,565Contacts tracked

466Verified emails

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The 25 largest B2B tech companies based in Kolkata, India

Ranked by team size

Top 25 of 161 B2B tech companies based in Kolkata, India, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to B2B tech 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	Capital Numbers	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	501-1,000	641 contacts →
	Indirect evidence “Capital Numbers – Transforming Businesses with AI, Cloud & Digital Engineering BSE-Listed \| 500+ Experts \| AI, Cloud, Data, System Integration & Custom Software Development We…” Source: RevenueBase Database · checked Sep 19, 2026
2	Vareli Tecnac Pvt. LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	51-200	227 contacts →
	Indirect evidence “As one of the growing digital transformation companies, Vareli Tecnac Pvt.” Source: RevenueBase Database · checked Sep 19, 2026
3	Simpsoft Solutions	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 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 19, 2026
4	Diamond Infotech PVT LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	51-200	81 contacts →
	Indirect evidence “Diamond Infotech Pvt.” Source: RevenueBase Database · checked Sep 19, 2026
5	Acceleron Solutions	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	51-200	80 contacts →
	Indirect evidence “Acceleron Solutions is a part of the 75-year-old Gainwell Group, a diversified conglomerate, headquartered in Kolkata India, and having branches and subsidiaries across India and…” Source: RevenueBase Database · checked Sep 19, 2026
6	Achievex Solutions Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 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 19, 2026
7	Surflex Technology Pvt. LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	51-200	43 contacts →
	Indirect evidence “About Surflex Technology Surflex Technology, a global IT company headquartered in India, stands as a beacon of innovation in business consulting, technology services, and product…” Source: RevenueBase Database · checked Sep 19, 2026
8	Moresco Software Services Pvt. LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	25 contacts →
	Indirect evidence “Moresco Software is a knowledge company currently providing information technology solutions to help organizations achieve their goals with services ranging from Cloud IT…” Source: RevenueBase Database · checked Sep 19, 2026
9	Openweb Solutions	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	23 contacts →
	Indirect evidence “Openweb Solutions is a technology service provider, providing analytics, cloud, web and mobility services to organizations across the globe.” Source: RevenueBase Database · checked Sep 19, 2026
10	Xiphos Technology Solutions Pvt. LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	23 contacts →
	Indirect evidence “Xiphos Technology Solutions Private Limited is a global Technology Consulting, Software Development and Services organization, incorporated in 2011.” Source: RevenueBase Database · checked Sep 19, 2026
11	Centreax Technologies	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	20 contacts →
	Indirect evidence “Centreax Technologies a software development and consulting organization providing application development, security consulting and IT Managed services to a number of domestic and…” Source: RevenueBase Database · checked Sep 19, 2026
12	Kalkey	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 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 19, 2026
13	Newamps Technologies LLP	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	15 contacts →
	Indirect evidence “IT Consulting company in Kolkata” Source: RevenueBase Database · checked Sep 19, 2026
14	SYS Edge Micro Informatics PVT LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	51-200	12 contacts →
	Indirect evidence “We at SYSTEM EDGE specialize in IT staff augmentation, software development & emerging technology services as a strategic partner to our clients in helping them drive their global…” Source: RevenueBase Database · checked Sep 19, 2026
15	Dharma.H Software Technologies Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “At dharma.h, we believe in value creation through innovation.” Source: RevenueBase Database · checked Sep 19, 2026
16	Omniminds Consulting	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “OmniMinds is an agentic AI development company.” Source: RevenueBase Database · checked Sep 19, 2026
17	Vihan Informatics PVT LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence “IT infrastructure solution provider” Source: RevenueBase Database · checked Sep 19, 2026
18	Webzemini Software Pvt. LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence “Webzemini Software established in 2009 and in 2012, we became a Private Limited Company.” Source: RevenueBase Database · checked Sep 19, 2026
19	Meshwork Technology Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 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 19, 2026
20	Netspeak Infotech Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	8 contacts →
	Indirect evidence “Netspeak Infotech Private Limited is the fastest growing IT solution provider in Kolkata.” Source: RevenueBase Database · checked Sep 19, 2026
21	Neonate Technologies	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 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 19, 2026
22	Agile Innotech	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	8 contacts →
	Indirect evidence “Agile Innotech, is a turnkey IT-Services and Solutions Provider based in Kolkata.” Source: RevenueBase Database · checked Sep 19, 2026
23	Mekhline Infotech Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “Mekhline Infotech is a cloud computing company offering a comprehensive IT products and services.” Source: RevenueBase Database · checked Sep 19, 2026
24	DCCIL	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	51-200	5 contacts →
	Indirect evidence “DCC is a market leader in consulting, technology, outsourcing and infrastructure services.” Source: RevenueBase Database · checked Sep 19, 2026
25	Yeppler	Indirect evidence	Kolkata, IndiaHQ checked Sep 19, 2026	11-50	5 contacts →
	Indirect evidence “Yeppler Internet Solutions is a StartUp IT Company with footprints in Europe, Asia and US.” Source: RevenueBase Database · checked Sep 19, 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: B2B tech 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 B2B tech companies.
Partial evidence: Its own public description names part of B2B tech companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name B2B tech 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 161 B2B tech companies based in Kolkata, India

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B2B tech companies based in Kolkata, India at a glance

As of Sep 19, 2026

18.2%Verified-email coverage

15.9Average contacts per company

11-50Median size (employees)

432.3%Largest-city concentration · Pune

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

10001+

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 161 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 B2B tech 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 “B2B tech 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 B2B tech 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 B2B tech 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, 466 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 19, 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.

B2B tech companies by metro in India

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 B2B tech 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 B2B tech companies are there based in Kolkata, India?

RevenueBase identified 161 B2B tech 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?

Capital Numbers, headquartered in Kolkata, tops this list with the largest team on record.

Which city has the most B2B tech companies?

Pune leads with 696 headquartered companies, followed by Hyderabad (691) and Noida (433).

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 466 verified decision-maker contacts tracked across these 161 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 19, 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.