Company lists · Data refreshed September 2026

Top 25 Outsource back office customer services worldwide

Name: Outsource back office customer services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 9,598 companies tracked

RevenueBase identified 9,598 outsource back office customer services worldwide as of September 2026 and tracks 425,856 professional contacts across them, including 36,318 with verified work emails. The United States is the largest market and Lahore the largest hub.

This list covers outsource back office customer services worldwide, 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. Country and city lists for outsource back office customer services follow the table.

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 RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

9,598Companies

425,856Contacts tracked

36,318Verified emails

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The 25 largest outsource back office customer services worldwide

Ranked by team size

Top 25 of 9,598 outsource back office customer services worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to outsource back office customer services: 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	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	10001+	20,824 contacts →
	Partial evidence “Capita is an outsourcer, helping clients across the public and private sectors run complex business processes more efficiently, creating better consumer experiences.” Source: RevenueBase Database · checked Sep 21, 2026
2	Ienergizer	Strong evidence	Noida, IndiaHQ checked Sep 21, 2026	10001+	14,745 contacts →
	Strong evidence “iEnergizer is a leading Business Process Outsourcing provider (“BPO”) of customer management solutions dedicated to delivering performance while actively supporting and advocating…” Source: RevenueBase Database · checked Sep 21, 2026
3	Intelcia	Partial evidence	Casablanca, MoroccoHQ checked Sep 21, 2026	10001+	13,214 contacts →
	Partial evidence “Intelcia is a global player in outsourcing, which has supported its clients for 20 years combining talents, technologies, and processes to offer a tailor-made service and skills…” Source: RevenueBase Database · checked Sep 21, 2026
4	Comdata Group	Indirect evidence	Corsico, ItalyHQ checked Sep 21, 2026	10001+	9,614 contacts →
	Indirect evidence “We're KONECTA now!” Source: RevenueBase Database · checked Sep 21, 2026
5	CCI Global	Partial evidence	Durban, South AfricaHQ checked Sep 21, 2026	10001+	6,349 contacts →
	Partial evidence “CCI Global is a distinguished leader in the Business Process Outsourcing (BPO) industry in Africa- Headquartered in the UAE, CCI is renowned for exceptional services across a…” Source: RevenueBase Database · checked Sep 21, 2026
6	XCEED	Partial evidence	Cairo, EgyptHQ checked Sep 21, 2026	10001+	6,302 contacts →
	Partial evidence “Xceed is the leading multilingual Business Process Outsourcing Service provider in EMEA region with a capacity of more than web enabled multi channels stations.” Source: RevenueBase Database · checked Sep 21, 2026
7	Emtelco S.A	Indirect evidence	Medellín, ColombiaHQ checked Sep 21, 2026	10001+	4,998 contacts →
	Indirect evidence “Maximizamos el valor de cada contacto de las empresas con sus clientes, gestionando los procesos de relacionamiento a través de canales tefónicos, virtuales y presenciales.” Source: RevenueBase Database · checked Sep 21, 2026
8	Liderança Serviços	Indirect evidence	São José, BrazilHQ checked Sep 21, 2026	10001+	4,504 contacts →
	Indirect evidence “Atuamos nos principais setores de terceirização, e somos pioneiros na implantação de contratos à distância.” Source: RevenueBase Database · checked Sep 21, 2026
9	Mindbridge	Indirect evidence	Lahore, PakistanHQ checked Sep 21, 2026	5,001-10,000	4,359 contacts →
	Indirect evidence “Founded in 2004, Mindbridge (Private) Limited is Pakistan’s largest BPO company, operating with a capacity.” Source: RevenueBase Database · checked Sep 21, 2026
10	Arcgate	Partial evidence	Udaipur, IndiaHQ checked Sep 21, 2026	1,001-5,000	4,122 contacts →
	Partial evidence “We are a fast-growing BPO & IT outsourcing firm with a team of 2500+ people passionate about data and technology.” Source: RevenueBase Database · checked Sep 21, 2026
11	Brasil Center Comunicações	Indirect evidence	n/a	5,001-10,000	3,979 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
12	GSS Global Sales Solutions	Indirect evidence	Madrid, SpainHQ checked Sep 21, 2026	10001+	3,716 contacts →
	Indirect evidence “is a tech company specialized in providing, and for.” Source: RevenueBase Database · checked Sep 21, 2026
13	Iqor Philippines	Indirect evidence	United StatesHQ checked Sep 21, 2026	n/a	3,370 contacts →
	Indirect evidence “We are a global BPO” Source: RevenueBase Database · checked Sep 21, 2026
14	EPX Eperformax Contact Centers	Partial evidence	Pasay City, PhilippinesHQ checked Sep 21, 2026	5,001-10,000	3,061 contacts →
	Partial evidence “ePerformax is a high-performing contact center & BPO that provides world-class, omnichannel service and support to a select group of Fortune companies and their customers.” Source: RevenueBase Database · checked Sep 21, 2026
15	Advanced Call Center Technologies, LLC	Partial evidence	Berwyn, PA, United StatesHQ checked Sep 21, 2026	5,001-10,000	2,774 contacts →
	Partial evidence “Advanced Call Center Technologies, LLC (ACT) is a premier provider of domestic (USA), near shore and far shore outsourced call center services to the financial services, mortgage…” Source: RevenueBase Database · checked Sep 21, 2026
16	Stream Global Services	Strong evidence	Eagan, MN, United StatesHQ checked Sep 21, 2026	10001+	2,772 contacts →
	Strong evidence “Stream Global Services is a premium business process outsource (BPO) service provider specializing in customer relationship management solutions including sales, customer care…” Source: RevenueBase Database · checked Sep 21, 2026
17	Expert Global Solutions NOW Alorica	Indirect evidence	United StatesHQ checked Sep 21, 2026	10001+	2,388 contacts →
	Indirect evidence “Expert Global Solutions is now part of Alorica.” Source: RevenueBase Database · checked Sep 21, 2026
18	Nexa BPO	Indirect evidence	Bogotá D.c, ColombiaHQ checked Sep 21, 2026	5,001-10,000	2,342 contacts →
	Indirect evidence “Más que un contact center y BPO, somos el partner que asegura que la experiencia de tus clientes sea increíble.” Source: RevenueBase Database · checked Sep 21, 2026
19	CAT Technologies Argentina	Strong evidence	Buenos Aires, ArgentinaHQ checked Sep 21, 2026	1,001-5,000	2,221 contacts →
	Strong evidence “Somos la compañía líder en Servicios Next Gen de Contact Center, Business Process Outsourcing (BPO) y Customer Experience (CX).” Source: RevenueBase Database · checked Sep 21, 2026
20	Alta Resources	Indirect evidence	Neenah, WI, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,046 contacts →
	Indirect evidence “Alta Resources has always worked to be something different.” Source: RevenueBase Database · checked Sep 21, 2026
21	PT Danamas Insan Kreasi Andalan Dika	Partial evidence	Jakarta Pusat, IndonesiaHQ checked Sep 21, 2026	1,001-5,000	2,036 contacts →
	Partial evidence “PT Danamas Insan Kreasi Andalan (DIKA) adalah solusi outsourcing terpercaya untuk membantu bisnis Anda tumbuh lebih cepat dan efisien.” Source: RevenueBase Database · checked Sep 21, 2026
22	MODER	Indirect evidence	Fort Lauderdale, United StatesHQ checked Sep 21, 2026	5,001-10,000	2,008 contacts →
	Indirect evidence “Moder was founded in December 2020, with the mission to positively impact the financial health of companies in need by powering their in-house processes using top talent, workflow…” Source: RevenueBase Database · checked Sep 21, 2026
23	Transcosmos INC	Indirect evidence	Toshima-ku, JapanHQ checked Sep 21, 2026	10001+	1,987 contacts →
	Indirect evidence “transcosmos launched its operations in 1966.” Source: RevenueBase Database · checked Sep 21, 2026
24	Allied Global	Indirect evidence	GuatemalaHQ checked Sep 21, 2026	5,001-10,000	1,979 contacts →
	Indirect evidence “Regardless of your Company’s size (from Start-ups to Fortune 500), business vertical or service requirements, we act as a seamless extension of your team to help you grow, and…” Source: RevenueBase Database · checked Sep 21, 2026
25	Gear INC	Strong evidence	SingaporeHQ checked Sep 21, 2026	5,001-10,000	1,974 contacts →
	Strong evidence “Empowering Global Brands Through Custom BPO Solutions Gear Inc delivers business process outsourcing solutions designed to meet the unique challenges of leading enterprises.” 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 back office customer services. 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 back office customer services.
Partial evidence: Its own public description names part of outsource back office customer services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outsource back office customer services. 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 9,598 outsource back office customer services worldwide

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Outsource back office customer services worldwide at a glance

As of Sep 21, 2026

8.5%Verified-email coverage

44.4Average contacts per company

11-50Median size (employees)

2.3%Largest-city concentration · Lahore

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

2,259

11-50

3,363

51-200

2,289

201-500

886

501-1,000

352

1,001-5,000

317

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 back office customer services, 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.
Coverage: Every country. Country and city lists for outsource back office customer services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “outsource back office customer services”. 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 back office customer services), 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 back office customer services, and records with no verified work email.
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, 36,318 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 back office customer services by location

45 lists · largest first

Every Outsource back office customer services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 back office customer services, 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 back office customer services are there worldwide?

RevenueBase identified 9,598 outsource back office customer services worldwide 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, headquartered in London, tops this list with the largest team on record.

Which country has the most outsource back office customer services?

The United States leads with 1,432 companies, followed by India (1,425) and Pakistan (641). Every outsource back office customer services list by country and city is linked on this page.

Which city has the most outsource back office customer services?

Lahore leads with 224 headquartered companies, followed by London (121) and Rawalpindi (119).

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 36,318 verified decision-maker contacts tracked across these 9,598 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.