Company lists · Data refreshed September 2026

Top 25 Onshore customer service outsourcing companies based in India

RevenueBase identified 530 company matches for onshore customer service outsourcing companies associated with India as of September 2026 and tracks 34,294 professional contacts across them, including 1,863 with verified work emails. Bangalore is the largest hub.

This list covers company matches for onshore customer service outsourcing companies associated with 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 29, 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 29, 2026 How this list was built
530Companies
34,294Contacts tracked
1,863Verified emails
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The 25 largest onshore customer service outsourcing companies based in India

Ranked by team size
Top 25 of 530 company matches for onshore customer service outsourcing companies based in India, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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 matchNoida, IndiaHQ recorded Sep 29, 202610001+14,745 contacts →

Exact match

“iEnergizer is a leading Business Process Outsourcing provider (“BPO”) of customer management solutions dedicated to delivering performance while actively supporting and advocating…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchNew Delhi, IndiaHQ recorded Sep 29, 20261,001-5,0001,166 contacts →

Exact match

“JindalX, part of OP Jindal Group, is a global service company creating success stories for over 20 years.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchChennai, IndiaHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
4Exact matchChandigarh, IndiaHQ recorded Sep 29, 20265,001-10,000801 contacts →

Exact match

“Acquired by Fusion BPO in 2021”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchGurgaon, IndiaHQ recorded Sep 29, 20261,001-5,000488 contacts →

Exact match

“Welcome to the India page of Transcom!”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchNoida, IndiaHQ recorded Sep 29, 20265,001-10,000467 contacts →

Exact match

“DigiTech is one of the fastest growing Outsourcing & Offsourcing company in Delhi/NCR.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchBangalore, IndiaHQ recorded Sep 29, 20261,001-5,000455 contacts →

Exact match

“ExpertCallers, a Flatworld Solutions company, is a well-established and reputed modern day call center outsourcing company.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchBangalore, IndiaHQ recorded Sep 29, 20261,001-5,000340 contacts →

Exact match

“We specialize in end-to-end outsourcing across all industries and functions, including: Customer Support & Call Center Inbound/outbound call handling, technical support, live…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9Exact matchVillupuram, IndiaHQ recorded Sep 29, 2026501-1,000306 contacts →

Exact match

“Deccan iServices Pvt.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchNew Delhi, IndiaHQ recorded Sep 29, 2026201-500284 contacts →

Exact match

“Navigant Technologies is an ISO 9001-2008 certified international call center headquartered in Delhi, India.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11Exact matchAhmedabad, IndiaHQ recorded Sep 29, 2026201-500284 contacts →

Exact match

“The Home for Your Dream Job”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12Exact matchMumbai, IndiaHQ recorded Sep 29, 2026201-500257 contacts →

Exact match

“Pinnacle Global provides outsourcing/offshoring services to businesses all around the globe.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchHyderabad, IndiaHQ recorded Sep 29, 2026201-500230 contacts →

Exact match

“Elmer Technologies LLP is an offshore service provider for various outsourcing processes & projects across all sectors of industry.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchHyderabad, IndiaHQ recorded Sep 29, 20261,001-5,000220 contacts →

Exact match

“CorpOne is dedicated in providing quality outsourcing solutions with feasible options and sustained growth.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15Exact matchNoida, IndiaHQ recorded Sep 29, 2026501-1,000184 contacts →

Exact match

“Radiate E Services Pvt.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchMumbai, IndiaHQ recorded Sep 29, 2026201-500163 contacts →

Exact match

“Excel Infoways Ltd is a Leading Customer Contact Centre providing Voice Based Services in the areas of Collections, Telemarketing and Customer Care.It offers a range of customer…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17Exact matchVisakhapatnam, IndiaHQ recorded Sep 29, 2026201-500144 contacts →

Exact match

“Precistat is a customer experience (CX) consultancy firm.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchMumbai, IndiaHQ recorded Sep 29, 20261,001-5,000144 contacts →

Exact match

“Advait Techserve India Pvt Ltd, established in 2004 and headquartered in Mumbai, specializes in crafting bespoke offshore remote office solutions.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchNew Delhi, IndiaHQ recorded Sep 29, 2026201-500129 contacts →

Exact match

“Ebullient Services provides clients with successful business process outsourcing (BPO) solutions.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchAhmadabad, IndiaHQ recorded Sep 29, 202651-200114 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchPatna, IndiaHQ recorded Sep 29, 202611-50110 contacts →

Exact match

“NORTHERN IT SERVICES PRIVATE LIMITED is a company based out of BESIDES 9 TO 9 SUPER MARKET, RAMNAGARI MORE SHIANA DIGHA ROAD, PATNA, Bihar, India.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchAhmedabad, IndiaHQ recorded Sep 29, 202651-200108 contacts →

Exact match

“Established in 2008, Mazda Consultancy Services Pvt.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchHyderabad, IndiaHQ recorded Sep 29, 20261,001-5,000106 contacts →

Exact match

“Value beyond cost control!”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchAhmedabad, IndiaHQ recorded Sep 29, 202651-20098 contacts →

Exact match

“iConsultera is a next-generation business consulting and outsourcing company helping staffing firms, accounting agencies, technology service providers, and global enterprises…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchDelhi, IndiaHQ recorded Sep 29, 202651-20097 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 530 onshore customer service outsourcing companies based in India

See the full list, filter by size, metro and specialty, and access 1,863 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Onshore customer service outsourcing companies based in India at a glance

As of Sep 29, 2026
5.4%Verified-email coverage
64.7Average contacts per company
11-50Median size (employees)
9.4%Largest-city concentration · Bangalore
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
89
11-50
215
51-200
123
201-500
50
501-1,000
18
1,001-5,000
27
5,001-10,000
4
10001+
3

Email recency for this list is measured worldwide rather than for India, so it is reported there. Company counts and contact totals on this page are exact for India, over 530 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 India whose business descriptions match “onshore customer service outsourcing companies” 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 1,863 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 29, 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 “onshore customer service outsourcing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many onshore customer service outsourcing companies are there based in India?

RevenueBase identified 530 company matches for onshore customer service outsourcing companies associated with 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?

Ienergizer tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most onshore customer service outsourcing companies?

Bangalore leads with 50 company records, followed by Noida (41) and Ahmedabad (35).

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 1,863 professional contacts with verified work emails tracked across these 530 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 29, 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 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.