Company lists · Data refreshed September 2026

Top 25 Customer service outsourcing advisors based in Mumbai, India

Name: Customer service outsourcing advisors based in Mumbai, India
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 140 companies tracked

RevenueBase identified 140 customer service outsourcing advisors headquartered in Mumbai, India as of September 2026 and tracks 25,775 professional contacts across them, including 2,515 with verified work emails. Across India, Noida is the largest hub for this category (169 companies); Mumbai has 140.

This list covers customer service outsourcing advisors headquartered in Mumbai, 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 28, 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 28, 2026 86% judged on-target in blind review

140Companies

25,775Contacts tracked

2,515Verified emails

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The 25 largest customer service outsourcing advisors based in Mumbai, India

Ranked by team size

Top 25 of 140 customer service outsourcing advisors based in Mumbai, India, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to customer service outsourcing advisors: 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	Capita India	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	5,001-10,000	1,757 contacts →
	Indirect evidence “Established in 2004, Capita India is part of Capita plc, the UK's No.” Source: RevenueBase Database · checked Sep 28, 2026
2	Csinfocomm	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	201-500	348 contacts →
	Partial evidence “CSInfocomm: Elevating Customer Experience, Redefining Solutions CSInfocomm is a dynamic Solution Provider renowned for elevating customer experience through innovative solutions.” Source: RevenueBase Database · checked Sep 28, 2026
3	Pinnacle Global Group	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	201-500	257 contacts →
	Partial evidence “Pinnacle Global provides outsourcing/offshoring services to businesses all around the globe.” Source: RevenueBase Database · checked Sep 28, 2026
4	Altruist BPO Services	Strong evidence	Mumbai, IndiaHQ checked Sep 28, 2026	10001+	193 contacts →
	Strong evidence “Altruist BPO is a leading global integrated solutions provider in Business Process Outsourcing, Customer Experience Management and IT Services with presence across India, Africa…” Source: RevenueBase Database · checked Sep 28, 2026
5	Excel Infoways LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	201-500	163 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
6	Advait Techserve	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	1,001-5,000	144 contacts →
	Indirect evidence “Advait Techserve India Pvt Ltd, established in 2004 and headquartered in Mumbai, specializes in crafting bespoke offshore remote office solutions.” Source: RevenueBase Database · checked Sep 28, 2026
7	Intalk.io	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	51-200	113 contacts →
	Partial evidence “intalk.io - An Omnichannel Customer Interaction Platform by Agami Tech.” Source: RevenueBase Database · checked Sep 28, 2026
8	Onion Insights	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	107 contacts →
	Partial evidence “Onion Insights is a Global Customer Experience Measurement company established in 2009, headquartered in Mumbai, India.” Source: RevenueBase Database · checked Sep 28, 2026
9	Diallo	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	501-1,000	83 contacts →
	Partial evidence “Business Process Outsourcing” Source: RevenueBase Database · checked Sep 28, 2026
10	Connections Direct India Private Limited	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	501-1,000	65 contacts →
	Partial evidence “For All Your Knowledge Outsourcing Needs” Source: RevenueBase Database · checked Sep 28, 2026
11	Mobile Telecommunications Limited	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	1,001-5,000	43 contacts →
	Indirect evidence “Mobile Telecommunications Limited is a public incorporated company, listed at Bombay Stock Exchange and National Stock Exchange and is an offshore outsourced contact center…” Source: RevenueBase Database · checked Sep 28, 2026
12	Vonup Solutions Private Limited	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	51-200	41 contacts →
	Partial evidence “VonUp BPO is a provider of business process outsourcing services focusing on the voice and non-voice based segments.” Source: RevenueBase Database · checked Sep 28, 2026
13	Deevoir	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	39 contacts →
	Indirect evidence “Start-ups & small businesses in metropolitan cities usually requires cost-cutting and proper management at a budgeted cost.” Source: RevenueBase Database · checked Sep 28, 2026
14	Bridgeloyalty Customer Experience Management LLP	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	34 contacts →
	Indirect evidence “Rohit is a specialist in service experience management with well-rounded business orientation.” Source: RevenueBase Database · checked Sep 28, 2026
15	Spectrum Consulting Services	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	31 contacts →
	Partial evidence “Spectrum is an innovative outsourcing business with a unique 100% work-from-home model.” Source: RevenueBase Database · checked Sep 28, 2026
16	Business Access India Pvt. LTD	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	25 contacts →
	Indirect evidence “Business Access India Private Limited is a family owned company established in 1997.” Source: RevenueBase Database · checked Sep 28, 2026
17	Support Direct India	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “With our rich repertoire and a collective experience of 23 years in the field of backend support services and marketing & sales, Support direct India is a trusted Business Process…” Source: RevenueBase Database · checked Sep 28, 2026
18	Datastraw Technologies	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	22 contacts →
	Partial evidence “Datastraw™ is a global leader in the customer experience (CX) industry.” Source: RevenueBase Database · checked Sep 28, 2026
19	Access Systems A Division Of Sanneet Computers Pvt. LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	51-200	20 contacts →
	Partial evidence “ACCESS SYSTEMS (A Division of Sanneet Computers Pvt Ltd) is a fast growing Information Technology company in India engaged in Business Process Outsourcing Services.” Source: RevenueBase Database · checked Sep 28, 2026
20	Callarity Private Limited	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	51-200	20 contacts →
	Indirect evidence “Callarity is a new-age contact center that delivers best-in-class productivity for our clients utilizing advanced technology, remote team, and industry expertise.” Source: RevenueBase Database · checked Sep 28, 2026
21	Kasyap Iserve	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	51-200	13 contacts →
	Indirect evidence “Kasyap iServe is an BPO based in Mumbai.” Source: RevenueBase Database · checked Sep 28, 2026
22	Upgraft Corporation	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	1-10	10 contacts →
	Indirect evidence “Upgraft Corporation is a modern business solutions company built to help organizations scale efficiently by combining the strength of people, technology, and AI.” Source: RevenueBase Database · checked Sep 28, 2026
23	Treb Business Services	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	10 contacts →
	Partial evidence “The company is based in Mumbai, India, and offers business process outsourcing.” Source: RevenueBase Database · checked Sep 28, 2026
24	Freebeez	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	8 contacts →
	Indirect evidence “FreeBeez is a firm that allows your organization to drive a complete cycle from IT solutions to HR solutions.” Source: RevenueBase Database · checked Sep 28, 2026
25	Strides Research	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	7 contacts →
	Partial evidence “Strides Research Solutions is a leading provider of high quality, customized and cost effective research solutions to global clients.” Source: RevenueBase Database · checked Sep 28, 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: customer service outsourcing advisors. 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 customer service outsourcing advisors.
Partial evidence: Its own public description names part of customer service outsourcing advisors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name customer service outsourcing advisors. 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 140 customer service outsourcing advisors based in Mumbai, India

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Customer service outsourcing advisors based in Mumbai, India at a glance

As of Sep 28, 2026

9.8%Verified-email coverage

184.1Average contacts per company

11-50Median size (employees)

Sep 28, 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

10001+

Email recency for this list is measured across the whole India list rather than for Mumbai, so it is reported there. Company counts and contact totals on this page are exact for Mumbai, over 140 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 customer service outsourcing advisors, 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 Mumbai, India whose own description of what they do matches “customer service outsourcing advisors”. 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 customer service outsourcing advisors), 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 customer service outsourcing advisors, and records with no verified work email. Companies headquartered outside Mumbai 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, 2,515 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 28, 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.

Customer service outsourcing advisors 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 customer service outsourcing advisors, 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 customer service outsourcing advisors are there based in Mumbai, India?

RevenueBase identified 140 customer service outsourcing advisors headquartered in Mumbai, 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?

Capita India, headquartered in Mumbai, tops this list with the largest team on record.

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

Noida leads India with 169 headquartered companies, followed by Bangalore (167) and New Delhi (153). Mumbai has 140.

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 2,515 verified decision-maker contacts tracked across these 140 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 28, 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.