Company lists · Data refreshed November 2026

Top 25 Call center services worldwide

Name: Call center services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 10,063 companies tracked

RevenueBase identified 10,063 company matches for call center services worldwide as of November 2026 and tracks 662,421 professional contacts across them, including 61,250 with verified work emails. The United States is the largest market and Lahore the largest hub.

This list covers company matches for call center services 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 November 5, 2026. Country and city lists for call center services 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 Nov 5, 2026 How this list was built

10,063Companies

662,421Contacts tracked

61,250Verified emails

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The 25 largest call center services worldwide

Ranked by team size

Top 25 of 10,063 company matches for call center services worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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	TTEC	Exact match	Austin, TX, United StatesHQ recorded Nov 5, 2026	10001+	30,312 contacts →
	Exact match “We’re TTEC (pronounced t.tec).” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	Konecta	Exact match	Madrid, SpainHQ recorded Nov 5, 2026	10001+	28,482 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 · Nov 5, 2026 · View company records in RevenueBase
3	IBEX	Exact match	Washington, DC, United StatesHQ recorded Nov 5, 2026	10001+	17,868 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 · Nov 5, 2026 · View company records in RevenueBase
4	VXI Global Solutions	Exact match	Los Angeles, United StatesHQ recorded Nov 5, 2026	10001+	17,251 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 · Nov 5, 2026 · View company records in RevenueBase
5	Ienergizer	Exact match	Noida, IndiaHQ recorded Nov 5, 2026	10001+	15,893 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 · Nov 5, 2026 · View company records in RevenueBase
6	Transcom	Exact match	Stockholm, SwedenHQ recorded Nov 5, 2026	10001+	15,323 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 · Nov 5, 2026 · View company records in RevenueBase
7	Intelcia	Exact match	Casablanca, MoroccoHQ recorded Nov 5, 2026	10001+	14,607 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 · Nov 5, 2026 · View company records in RevenueBase
8	Comdata Group	Exact match	Corsico, ItalyHQ recorded Nov 5, 2026	10001+	10,448 contacts →
	Exact match “We're KONECTA now!” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9	Turkcell Global Bilgi	Exact match	Beyoglu, TürkiyeHQ recorded Nov 5, 2026	10001+	6,889 contacts →
	Exact match “Bir Turkcell grup şirketi olarak yılında kurulduğumuzda amacımız hep eşsiz bir müşteri deneyimi yaşatmaktı.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	Afni, INC	Exact match	Bloomington, United StatesHQ recorded Nov 5, 2026	10001+	6,716 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 · Nov 5, 2026 · View company records in RevenueBase
11	Emtelco S.A	Exact match	Medellín, ColombiaHQ recorded Nov 5, 2026	10001+	6,207 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 · Nov 5, 2026 · View company records in RevenueBase
12	Callink	Exact match	Uberlândia, BrazilHQ recorded Nov 5, 2026	5,001-10,000	4,874 contacts →
	Exact match “Mais que call center: soluções que transformam o seu negócio e a jornada dos clientes!” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Call Center Services International	Exact match	San Diego, United StatesHQ recorded Nov 5, 2026	1,001-5,000	4,858 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 · Nov 5, 2026 · View company records in RevenueBase
14	Apex America	Exact match	Córdoba, ArgentinaHQ recorded Nov 5, 2026	10001+	4,849 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 · Nov 5, 2026 · View company records in RevenueBase
15	Continuum Global Solutions	Exact match	Dallas, TX, United StatesHQ recorded Nov 5, 2026	5,001-10,000	4,798 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 · Nov 5, 2026 · View company records in RevenueBase
16	Startek India	Exact match	Mumbai, IndiaHQ recorded Nov 5, 2026	10001+	4,772 contacts →
	Exact match “Startek is a leading global provider of technology-enabled business process outsourcing solutions.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Mindbridge	Exact match	Lahore, PakistanHQ recorded Nov 5, 2026	5,001-10,000	4,730 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 · Nov 5, 2026 · View company records in RevenueBase
18	Ibex. Pakistan	Exact match	Karachi, PakistanHQ recorded Nov 5, 2026	10001+	4,555 contacts →
	Exact match “ibex.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	Vikstar Contact Center	Exact match	Sao Paulo, BrazilHQ recorded Nov 5, 2026	10001+	4,363 contacts →
	Exact match “Vikstar is one of the biggest contact centers of Brazil.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	GSS Global Sales Solutions	Exact match	Madrid, SpainHQ recorded Nov 5, 2026	10001+	4,355 contacts →
	Exact match “is a tech company specialized in providing, and for.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	Sercom	Exact match	Taboão Da Serra, BrazilHQ recorded Nov 5, 2026	5,001-10,000	4,283 contacts →
	Exact match “Founded in 1993, since the beginning Sercom has stood out in the Contact Center Services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Teleperformance Global Services	Exact match	Kolkata, IndiaHQ recorded Nov 5, 2026	1,001-5,000	4,105 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	EPX Eperformax Contact Centers	Exact match	Pasay City, PhilippinesHQ recorded Nov 5, 2026	5,001-10,000	3,904 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	Quantrics Enterprises INC	Exact match	Taytay, PhilippinesHQ recorded Nov 5, 2026	5,001-10,000	3,611 contacts →
	Exact match “In the Philippines, Quantrics by NQX is redefining customer experience by bringing together the expertise of a global leader and the passion of world-class Filipino talent.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	Telvista	Exact match	Dallas, TX, United StatesHQ recorded Nov 5, 2026	1,001-5,000	3,517 contacts →
	Exact match “Email: info@Telvista.com Telvista is a premier provider of contact solutions that drive customer loyalty and create competitive advantage for our clients.” Recorded in the RevenueBase company graph · Nov 5, 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 “call center services”. 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 10,063 call center services worldwide

See the full list, filter by size, metro and specialty, and access 61,250 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Call center services worldwide at a glance

As of Nov 5, 2026

9.2%Verified-email coverage

65.8Average contacts per company

11-50Median size (employees)

2.4%Largest-city concentration · Lahore

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

1,951

11-50

3,489

51-200

2,590

201-500

999

501-1,000

453

1,001-5,000

389

5,001-10,000

10001+

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 call center services are linked below.
What qualifies: Company records worldwide whose business descriptions match “call center services” 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 61,250 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 November 5, 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.

Call center services by location

60 lists · largest first

Every Call center 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 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 “call center services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many call center services are there worldwide?

RevenueBase identified 10,063 company matches for call center services worldwide as of November 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?

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

Which country has the most call center services?

The United States leads with 1,647 companies, followed by India (905) and Pakistan (765). Every call center services list by country and city is linked on this page.

Which city has the most call center services?

Lahore leads with 244 company records, followed by Rawalpindi (157) and Karachi (120).

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 61,250 professional contacts with verified work emails tracked across these 10,063 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 November 5, 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.