Company lists · Data refreshed September 2026
Top 25 Outsourcing service providers based in Mumbai, India
RevenueBase identified 174 outsourcing service providers headquartered in Mumbai, India as of September 2026 and tracks 33,767 professional contacts across them, including 4,497 with verified work emails. Bangalore is the largest hub.
This list covers outsourcing service providers 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 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.
The 25 largest outsourcing service providers based in Mumbai, India
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 17,257 contacts → | ||||
Indirect evidence “Firstsource Solutions Limited, an RP-Sanjiv Goenka Group company, is a global intelligence partner to enterprises across healthcare, banking and financial services…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,757 contacts → | ||||
Indirect evidence “Established in 2004, Capita India is part of Capita plc, the UK's No.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,466 contacts → | ||||
Indirect evidence “We’re Tech Mahindra Business Process Services.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 732 contacts → | ||||
Strong evidence “Altius is a leading provider of Information Technology and BPO (Business Process Outsourcing) Services.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 686 contacts → | ||||
Indirect evidence “We offer Business Process Services that are efficient, strategic, economical and deliver business outcomes beyond expectations.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 332 contacts → | ||||
Strong evidence “Pegasus InfoCorp is a global leader in consulting, technology and outsourcing services.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 257 contacts → | ||||
Strong evidence “Pinnacle Global provides outsourcing/offshoring services to businesses all around the globe.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 163 contacts → | ||||
Indirect 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 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 83 contacts → | ||||
Strong evidence “Business Process Outsourcing” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 80 contacts → | ||||
Indirect evidence “We founded Infinzi in 2017 with a vision to empower business owners to focus on strengthening the core competencies of their businesses.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 79 contacts → | ||||
Indirect evidence “ALFA KPO PRIVATE LIMITED is a company based out of 704, GOLDEN CHAMBERS, OPP.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 73 contacts → | ||||
Indirect evidence “At Interspence, we offer cutting-edge solutions designed to give businesses a competitive edge by enhancing customer experiences, ensuring security, and boosting productivity.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 65 contacts → | ||||
Strong evidence “For All Your Knowledge Outsourcing Needs” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 55 contacts → | ||||
Indirect evidence “Founded in 2005 Promoted by $2 Billion Multinational Business House Global provider of end-to-end solutions in the area of - Software services - Data & Voice based services -…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 51 contacts → | ||||
Indirect evidence “Silverline Technologies Limited, formerly known as Silverline Industries Limited, was incorporated in April 1992 and was India's 1st company to be listed in the New York Stock…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 50 contacts → | ||||
Strong evidence “Zedexinfo is one of the leading providers of technology services and end-to-end business process outsourcing solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 43 contacts → | ||||
Strong evidence “KontactGlobal is a present-day business & knowledge process outsourcing, education counselling and management consulting company that sees potential in every business and every…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 41 contacts → | ||||
Strong 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 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 31 contacts → | ||||
Strong evidence “Spectrum is an innovative outsourcing business with a unique 100% work-from-home model.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 29 contacts → | ||||
Indirect evidence “Ratein Infotech India Private Limited incorporated in the year August with its roots that can be traced to the turn of this century.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 28 contacts → | ||||
Indirect evidence “MedDirect BPO - We provide BPO services with multi-lingual support!” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 22 contacts → | ||||
Indirect evidence “Sakash Group is a 38 year old well-established and professionally managed group in the field of business Support Services, Resource Management & Facility Management Services…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
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: outsourcing service providers. 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 outsourcing service providers.
- Partial evidence
- Its own public description names part of outsourcing service providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name outsourcing service providers. 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 174 outsourcing service providers based in Mumbai, India
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Outsourcing service providers based in Mumbai, India at a glance
As of Sep 21, 2026Companies by employee count
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 174 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 outsourcing service providers, 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 “outsourcing service providers”. 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 outsourcing service providers), 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 outsourcing service providers, 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, 4,497 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.
Outsourcing service providers by metro in India
- Outsourcing service providers in Bangalore234
- Outsourcing service providers in Hyderabad228
- Outsourcing service providers in Noida215
- Outsourcing service providers in Pune190
- Outsourcing service providers in New Delhi182
- Outsourcing service providers in Chennai181
- Outsourcing service providers in Mumbai174
- Outsourcing service providers in Ahmedabad171
- Outsourcing service providers in Kolkata142
- Outsourcing service providers in Bengaluru103
- Outsourcing service providers in Delhi97
- Outsourcing service providers in Gurgaon77
- Outsourcing service providers in Jaipur68
- Outsourcing service providers in Coimbatore60
- Outsourcing service providers in Indore56
- Outsourcing service providers in Gurugram52
- Outsourcing service providers in Udaipur52
- Outsourcing service providers in Navi Mumbai48
- Outsourcing service providers in Mohali46
- Outsourcing service providers in Lucknow45
- Outsourcing service providers in Thane34
- Outsourcing service providers in Vadodara33
- Outsourcing service providers in Bhopal26
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 outsourcing service providers, 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 outsourcing service providers are there based in Mumbai, India?
RevenueBase identified 174 outsourcing service providers 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?
Firstsource, headquartered in Mumbai, tops this list with the largest team on record.
Which city has the most outsourcing service providers?
Bangalore leads with 234 headquartered companies, followed by Hyderabad (228) and Noida (215).
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 4,497 verified decision-maker contacts tracked across these 174 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.
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