Company lists · Data refreshed September 2026

Top 25 Outsource companies based in Kolkata, India

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 173 companies tracked

RevenueBase identified 173 outsource companies headquartered in Kolkata, India as of September 2026 and tracks 4,405 professional contacts across them, including 259 with verified work emails. Ahmedabad is the largest hub.

This list covers outsource 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 21, 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 21, 2026 86% judged on-target in blind review

173Companies

4,405Contacts tracked

259Verified emails

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The 25 largest outsource companies based in Kolkata, India

Ranked by team size

Top 25 of 173 outsource companies based in Kolkata, India, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to outsource 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	Tranistics Data Technologies Pvt. LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	501-1,000	398 contacts →
	Indirect evidence “Tranistics Data Technologies Pvt.” Source: RevenueBase Database · checked Sep 21, 2026
2	Mervice Infotech Pvt. LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	1,001-5,000	395 contacts →
	Indirect evidence “As a company with the potential to establish a strong foothold within the BPO domain Mervice promises to go beyond ensuring quality inbound and outbound services.” Source: RevenueBase Database · checked Sep 21, 2026
3	Value RCM Solutions Pvt. LTD	Strong evidence	Kolkata, IndiaHQ checked Sep 21, 2026	201-500	247 contacts →
	Strong evidence “Value RCM Solutions is a leading provider of comprehensive outsourcing solutions tailored to the healthcare industry (Medical Billing Companies, Hospitals, Ambulatory Surgical…” Source: RevenueBase Database · checked Sep 21, 2026
4	Cegura Technology Solutions	Strong evidence	Kolkata, IndiaHQ checked Sep 21, 2026	201-500	246 contacts →
	Strong evidence “Cegura Technology Solutions is a emerging Business Process Outsourcing (BPO) Service provider, offering the most advanced services available today.” Source: RevenueBase Database · checked Sep 21, 2026
5	Floating Numbers Digital Solutions	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	501-1,000	208 contacts →
	Indirect evidence “Floating Numbers is a trusted BPO company in Kolkata.” Source: RevenueBase Database · checked Sep 21, 2026
6	Mytasker	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	51-200	166 contacts →
	Indirect evidence “When young minds unleash their voracious ambitions, dreams and aspirations the outcome is always awe-inspiring.” Source: RevenueBase Database · checked Sep 21, 2026
7	Excellis IT	Strong evidence	Kolkata, IndiaHQ checked Sep 21, 2026	201-500	83 contacts →
	Strong evidence “EXCELLIS IT is one of the leading service providers in the field of Information Technology that has been instrumental in catering tailored telemarketing outsourcing services along…” Source: RevenueBase Database · checked Sep 21, 2026
8	Bozon Technologies Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	11-50	23 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
9	Rising Group	Strong evidence	Kolkata, IndiaHQ checked Sep 21, 2026	51-200	21 contacts →
	Strong evidence “Rising Group is an emerging Business Process Outsourcing (BPO) Service provider running since 2013, offering the most advanced services available today.” Source: RevenueBase Database · checked Sep 21, 2026
10	Synergy Accounting Services LLP	Strong evidence	Kolkata, IndiaHQ checked Sep 21, 2026	11-50	20 contacts →
	Strong evidence “Synergy Accounting Services is a young and fast growing finance and accounts outsourcing company primarily dealing with CPAs and accounting firms across the United States of…” Source: RevenueBase Database · checked Sep 21, 2026
11	Itrix IT Solutions Pvt. LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	11-50	20 contacts →
	Indirect evidence “Welcome to ITRIX IT Solutions Pvt.” Source: RevenueBase Database · checked Sep 21, 2026
12	Raddinas	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	51-200	18 contacts →
	Indirect evidence “With a super combo of human and device intelligence, we offer strong and revolutionary answers to streamline your operations so that you can get attention in your center…” Source: RevenueBase Database · checked Sep 21, 2026
13	DWC Technologies Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	51-200	18 contacts →
	Indirect evidence “Founded in 2014, DWC Technologies Pvt.” Source: RevenueBase Database · checked Sep 21, 2026
14	Vanggharamaa BPO	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	51-200	17 contacts →
	Indirect evidence “Vanggharamaa BPO (formerly known as All Area Access Solutions) is a leading customer service company that provides comprehensive support to businesses of all sizes and…” Source: RevenueBase Database · checked Sep 21, 2026
15	First Voice Global Services	Strong evidence	Kolkata, IndiaHQ checked Sep 21, 2026	51-200	17 contacts →
	Strong evidence “Different breed of BPO with over 20 years experience in Outsourcing & Offshoring industry.” Source: RevenueBase Database · checked Sep 21, 2026
16	Vooraf	Strong evidence	Kolkata, IndiaHQ checked Sep 21, 2026	201-500	13 contacts →
	Strong evidence “We are one of the leading outsources offering innovative delivery models that promise flexibility to the clients in choosing their involvement level.” Source: RevenueBase Database · checked Sep 21, 2026
17	Task Venturers	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “In November 2017, we began our entrepreneurial journey with the vision to provide affordable enterprise-level solutions to startups and businesses around the world.” Source: RevenueBase Database · checked Sep 21, 2026
18	Indiantech	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	11-50	8 contacts →
	Indirect evidence “Indian Tech initiated with a simple, yet profound design i.e.” Source: RevenueBase Database · checked Sep 21, 2026
19	Logica Infotech Services Pvt. LTD	Strong evidence	Kolkata, IndiaHQ checked Sep 21, 2026	51-200	7 contacts →
	Strong evidence “Being one of the prominent providers of IT & BPO, Logica Infotech is a well-recognized name in the world outsourcing industry.” Source: RevenueBase Database · checked Sep 21, 2026
20	RFS Business Solutions PVT LTD	Strong evidence	Kolkata, IndiaHQ checked Sep 21, 2026	11-50	7 contacts →
	Strong evidence “RFS Business Solutions is the top provider of outsourced contact centre solutions to businesses with worldwide reach through international alliances.” Source: RevenueBase Database · checked Sep 21, 2026
21	Mindful US CPA	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	51-200	5 contacts →
	Indirect evidence “Mindful US CPA is a offshore staffing solutions provider to accounting and tax firms across North America.” Source: RevenueBase Database · checked Sep 21, 2026
22	Dedicated VA	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	201-500	4 contacts →
	Indirect evidence “Looking for the best virtual assistant services?” Source: RevenueBase Database · checked Sep 21, 2026
23	Enserv	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	1-10	3 contacts →
	Indirect evidence “Partnering in Growth.” Source: RevenueBase Database · checked Sep 21, 2026
24	Asmaar Infotech & Communication Media PVT LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	51-200	2 contacts →
	Indirect evidence “AICM PVT LTD IS AN INTERNATIONAL BPO.” Source: RevenueBase Database · checked Sep 21, 2026
25	Audigold Virtual Services	Indirect evidence	Kolkata, IndiaHQ checked Sep 21, 2026	1-10	2 contacts →
	Indirect evidence “Audigold Virtual Services is a virtual services company that offers you much beyond Cost Arbitrage and the Out-Sourcing Advantage.” Source: RevenueBase Database · checked Sep 21, 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: outsource 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 outsource companies.
Partial evidence: Its own public description names part of outsource companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outsource 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 173 outsource companies based in Kolkata, India

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Outsource companies based in Kolkata, India at a glance

As of Sep 21, 2026

5.9%Verified-email coverage

25.5Average contacts per company

11-50Median size (employees)

212.1%Largest-city concentration · Ahmedabad

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 173 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 outsource 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 “outsource 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 outsource 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 outsource 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, 259 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 21, 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.

Outsource 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 outsource 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 outsource companies are there based in Kolkata, India?

RevenueBase identified 173 outsource 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?

Tranistics Data Technologies Pvt. LTD, headquartered in Kolkata, tops this list with the largest team on record.

Which city has the most outsource companies?

Ahmedabad leads with 367 headquartered companies, followed by New Delhi (302) and Noida (296).

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 259 verified decision-maker contacts tracked across these 173 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 21, 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.