Company lists · Data refreshed September 2026

Top 14 Customer service outsourcing firms based in Chennai, India

RevenueBase identified 88 company matches for customer service outsourcing firms associated with Chennai, India as of September 2026 and tracks 2,827 professional contacts across them, including 80 with verified work emails. Across India, Bangalore is the largest hub for this category (185 companies); Chennai has 88.

This list covers company matches for customer service outsourcing firms associated with Chennai, India, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built
88Companies
2,827Contacts tracked
80Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 14 largest customer service outsourcing firms based in Chennai, India

Ranked by team size
Top 14 of 88 company matches for customer service outsourcing firms based in Chennai, India, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchChennai, IndiaHQ recorded Sep 28, 20261,001-5,000879 contacts →

Exact match

“Started operation on 2004 with 25 employees, Currently iMarque has grown into a powerhouse of over professionals today, consistently achieving an impressive 40% average annual…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchChennai, IndiaHQ recorded Sep 28, 2026201-50088 contacts →

Exact match

“iV Support Technologies emerged from the aspirations of a group of industry enthusiasts to provide efficient and effective business solutions to clients.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchChennai, IndiaHQ recorded Sep 28, 2026201-50082 contacts →

Exact match

“Professional Services and Consultancy TeleApps provides flexible solution integration consulting & services to the Enterprise and contact centre industries.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchChennai, IndiaHQ recorded Sep 28, 202651-20074 contacts →

Exact match

“DPI is a premier marketing research outsourcing company with state-of-the-art in-house resources, experienced and dedicated staff and advanced analytical capabilities that can…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchChennai, IndiaHQ recorded Sep 28, 202651-20031 contacts →

Exact match

“InterPro Global is a leader in SmartSourcing offering Business Process Outsourcing and Offshoring services to companies.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchChennai, IndiaHQ recorded Sep 28, 202651-20027 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchChennai, IndiaHQ recorded Sep 28, 202611-5022 contacts →

Exact match

“Sundaram Business Services provides BPO back office services for customer lifecycle management, accounts payable, payroll, lending and insurance companies in addition to the call…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchChennai, IndiaHQ recorded Sep 28, 202611-5022 contacts →

Exact match

“What We Do: At 42andmore, we help businesses accelerate their growth by helping them outsource - Marketing & video content production - CRM software & Cloud telephony solutions -…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchChennai, IndiaHQ recorded Sep 28, 2026201-50020 contacts →

Exact match

“Incorporated in October 2006 as a wholly owned subsidiary of ETA –Ascon Group, Altech Star BPO (Altech) offers complete suite of BPO services of voice and non –voice.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchChennai, IndiaHQ recorded Sep 28, 202651-20014 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchChennai, IndiaHQ recorded Sep 28, 202651-20012 contacts →

Exact match

“Phoenix Business Initiatives (PBI) is a young and vibrant company that aims to provide high quality services.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchChennai, IndiaHQ recorded Sep 28, 202611-506 contacts →

Exact match

“An Office away from your Office" is the concept based on which Danish Business Services Private Limited has been established in Chennai, India for catering to the needs of global…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchChennai, IndiaHQ recorded Sep 28, 202651-2005 contacts →

Exact match

“YEO - Your Extended Office is an outsourcing company for PEO/ASO/HRO/Staffing Companies exclusively in the US helping to reduce 55% of the operational cost by taking care of all…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchChennai, IndiaHQ recorded Sep 28, 202651-2004 contacts →

Exact match

“ABOUT YITRO In the business of connecting Excellence.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 14 of 88 customer service outsourcing firms based in Chennai, India

See the full list, filter by size, metro and specialty, and access 80 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Customer service outsourcing firms based in Chennai, India at a glance

As of Sep 28, 2026
2.8%Verified-email coverage
32.1Average contacts per company
11-50Median size (employees)
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
17
11-50
33
51-200
21
201-500
9
501-1,000
5
1,001-5,000
3

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 88 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Chennai, India whose business descriptions match “customer service outsourcing firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 80 professional contacts with verified work emails across the full matched dataset. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “customer service outsourcing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many customer service outsourcing firms are there based in Chennai, India?

RevenueBase identified 88 company matches for customer service outsourcing firms associated with Chennai, India as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Imarque Solutions Pvt. LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in India has the most customer service outsourcing firms?

Bangalore leads India with 185 company records, followed by Noida (135) and Pune (125). Chennai has 88.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 80 professional contacts with verified work emails tracked across these 88 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 88 customer service outsourcing firms based in Chennai, India. Start with a free account, no credit card.

Download this list →

Related lists

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 SmartSearch, 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.