Company lists · Data refreshed September 2026

Top 25 Customer service outsourcing firms worldwide

Name: Customer service outsourcing firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 17,476 companies tracked

RevenueBase identified 17,476 company matches for customer service outsourcing firms worldwide as of September 2026 and tracks 1,067,221 professional contacts across them, including 95,976 with verified work emails. The United States is the largest market and Lahore the largest hub.

This list covers company matches for customer service outsourcing firms worldwide, 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. Country and city lists for customer service outsourcing firms follow the table.

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

17,476Companies

1,067,221Contacts tracked

95,976Verified emails

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The 25 largest customer service outsourcing firms worldwide

Ranked by team size

Top 25 of 17,476 company matches for customer service outsourcing firms worldwide, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Atento	Exact match	Madrid, MexicoHQ recorded Sep 28, 2026	10001+	77,129 contacts →
	Exact match “We are one of the world's largest global providers of customer relationship management and business transformation outsourcing (CRM/BTO) services and industry leaders in Latin…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Alorica	Exact match	Irvine, CA, United StatesHQ recorded Sep 28, 2026	10001+	47,558 contacts →
	Exact match “We’re passionate about creating customers for life by designing experiences that elevate your brand.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	TTEC	Exact match	Austin, TX, United StatesHQ recorded Sep 28, 2026	10001+	26,420 contacts →
	Exact match “We’re TTEC (pronounced t.tec).” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Konecta	Exact match	Madrid, SpainHQ recorded Sep 28, 2026	10001+	23,763 contacts →
	Exact match “Konecta is a leading innovative global service provider in customer management business process outsourcing, with passionate employees working in 40 languages across 4 continents…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Capita	Exact match	London, United KingdomHQ recorded Sep 28, 2026	10001+	20,824 contacts →
	Exact match “Capita is an outsourcer, helping clients across the public and private sectors run complex business processes more efficiently, creating better consumer experiences.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	AEC	Exact match	Belo Horizonte, BrazilHQ recorded Sep 28, 2026	10001+	20,095 contacts →
	Exact match “A AeC é apontada consistentemente como a líder brasileira na entrega de soluções de experiência do cliente e gestão de processos terceirizados.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	IBEX	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	10001+	15,457 contacts →
	Exact match “ibex delivers innovative business process outsourcing (BPO), smart digital marketing, online acquisition technology, and end-to-end customer engagement solutions to help companies…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Ienergizer	Exact match	Noida, IndiaHQ recorded Sep 28, 2026	10001+	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 28, 2026 · View company records in RevenueBase
9	VXI Global Solutions	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 28, 2026	10001+	14,238 contacts →
	Exact match “About VXI Global Solutions VXI Global Solutions is a BPO leader in customer service, customer experience, and digital solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Intelcia	Exact match	Casablanca, MoroccoHQ recorded Sep 28, 2026	10001+	13,214 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Transcom	Exact match	Stockholm, SwedenHQ recorded Sep 28, 2026	10001+	12,955 contacts →
	Exact match “Transcom provides digitally enhanced customer experience (CX) services to some of the world's most ambitious brands.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Comdata Group	Exact match	Corsico, ItalyHQ recorded Sep 28, 2026	10001+	9,614 contacts →
	Exact match “We're KONECTA now!” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Turkcell Global Bilgi	Exact match	Beyoglu, TürkiyeHQ recorded Sep 28, 2026	10001+	6,167 contacts →
	Exact match “Bir Turkcell grup şirketi olarak yılında kurulduğumuzda amacımız hep eşsiz bir müşteri deneyimi yaşatmaktı.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Everise	Exact match	Plantation, FL, United StatesHQ recorded Sep 28, 2026	10001+	5,863 contacts →
	Exact match “Everise delivers happiness to millions of customers around the world.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Afni, INC	Exact match	Bloomington, IL, United StatesHQ recorded Sep 28, 2026	10001+	5,553 contacts →
	Exact match “When people reach for their phones, use laptops, or grab their tablets, Afni's contact center teams are there to provide prompt and friendly help.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Emtelco S.A	Exact match	Medellín, ColombiaHQ recorded Sep 28, 2026	10001+	4,998 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Call Center Services International	Exact match	San Diego, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	4,561 contacts →
	Exact match “CCSI specializes in high‑performance, cost‑efficient contact center solutions supported by a world‑class bilingual workforce and state‑of‑the‑art infrastructure in Mexico.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Liderança Serviços	Exact match	São José, BrazilHQ recorded Sep 28, 2026	10001+	4,504 contacts →
	Exact match “Atuamos nos principais setores de terceirização, e somos pioneiros na implantação de contratos à distância.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Startek India	Exact match	Mumbai, IndiaHQ recorded Sep 28, 2026	10001+	4,389 contacts →
	Exact match “Startek is a leading global provider of technology-enabled business process outsourcing solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Apex America	Exact match	Córdoba, ArgentinaHQ recorded Sep 28, 2026	10001+	4,377 contacts →
	Exact match “At Apex America, we are a Next Generation BPO and a global strategic partner specialized in elevating customer service standards.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Mindbridge	Exact match	Lahore, PakistanHQ recorded Sep 28, 2026	5,001-10,000	4,359 contacts →
	Exact match “Founded in 2004, Mindbridge (Private) Limited is Pakistan’s largest BPO company, operating with a capacity.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Continuum Global Solutions	Exact match	Dallas, TX, United StatesHQ recorded Sep 28, 2026	5,001-10,000	4,342 contacts →
	Exact match “With a fresh name and decades of contact center expertise, we’re dedicated to collaborative partnerships, understanding your unique needs, and tailoring solutions for an enhanced…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Paschoalotto	Exact match	Bauru, BrazilHQ recorded Sep 28, 2026	10001+	4,193 contacts →
	Exact match “Somos um ecossistema de soluções em outsourcing, especialistas em cobrança e atendimento.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Ibex. Pakistan	Exact match	Karachi, PakistanHQ recorded Sep 28, 2026	10001+	4,161 contacts →
	Exact match “ibex.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Callink	Exact match	Uberlândia, BrazilHQ recorded Sep 28, 2026	5,001-10,000	4,126 contacts →
	Exact match “Mais que call center: soluções que transformam o seu negócio e a jornada dos clientes!” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “customer service outsourcing firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 17,476 customer service outsourcing firms worldwide

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Customer service outsourcing firms worldwide at a glance

As of Sep 28, 2026

9.0%Verified-email coverage

61.1Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · Lahore

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

4,069

11-50

5,914

51-200

4,116

201-500

1,645

501-1,000

714

1,001-5,000

703

5,001-10,000

145

10001+

129

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for customer service outsourcing firms are linked below.
What qualifies: Company records worldwide 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. 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 95,976 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.

Customer service outsourcing firms by location

103 lists · largest first

Every Customer service outsourcing firms 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 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 worldwide?

RevenueBase identified 17,476 company matches for customer service outsourcing firms worldwide 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?

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

Which country has the most customer service outsourcing firms?

The United States leads with 2,529 companies, followed by India (2,222) and Pakistan (990). Every customer service outsourcing firms list by country and city is linked on this page.

Which city has the most customer service outsourcing firms?

Lahore leads with 338 company records, followed by Sao Paulo (197) and London (195).

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 95,976 professional contacts with verified work emails tracked across these 17,476 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.

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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.