Company lists · Data refreshed November 2026

Top 25 Telemarketing services worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 10,515 companies tracked

RevenueBase identified 10,515 company matches for telemarketing services worldwide as of November 2026 and tracks 279,398 professional contacts across them, including 21,516 with verified work emails. The United States is the largest market and Lahore the largest hub.

This list covers company matches for telemarketing 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 telemarketing 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

10,515Companies

279,398Contacts tracked

21,516Verified emails

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The 25 largest telemarketing services worldwide

Ranked by team size

Top 25 of 10,515 company matches for telemarketing 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	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
2	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
3	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
4	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
5	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
6	Stream Global Services	Exact match	Eagan, BC, United StatesHQ recorded Nov 5, 2026	10001+	3,230 contacts →
	Exact match “Stream Global Services is a premium business process outsource (BPO) service provider specializing in customer relationship management solutions including sales, customer care…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	Advanced Call Center Technologies, LLC	Exact match	Berwyn, PA, United StatesHQ recorded Nov 5, 2026	5,001-10,000	3,116 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	CAT Technologies Argentina	Exact match	Buenos Aires, FL, ArgentinaHQ recorded Nov 5, 2026	1,001-5,000	2,460 contacts →
	Exact match “Somos la compañía líder en Servicios Next Gen de Contact Center, Business Process Outsourcing (BPO) y Customer Experience (CX).” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9	Alta Resources	Exact match	Neenah, CA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,341 contacts →
	Exact match “Alta Resources has always worked to be something different.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	Allied Global	Exact match	Des Moines, IA, GuatemalaHQ recorded Nov 5, 2026	5,001-10,000	2,152 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	Supportninja	Exact match	Austin, TX, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,070 contacts →
	Exact match “SupportNinja provides customer experience and back-office support services for tech companies and startups around the world.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12	Support Services Group	Exact match	Waco, United StatesHQ recorded Nov 5, 2026	5,001-10,000	2,055 contacts →
	Exact match “Support Services Group (SSG) helps businesses accelerate growth and earn customers for life through high-touch, outsourced engagement center services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Infocision Management Corporation	Exact match	Akron, OH, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,947 contacts →
	Exact match “InfoCision is an award-winning contact center partner trusted by leading brands for over 40 years.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Km2 Solutions	Exact match	Boca Raton, United StatesHQ recorded Nov 5, 2026	5,001-10,000	1,921 contacts →
	Exact match “Award-winning outsourcing partner with two decades of experience operating an exclusively nearshore strategy that delivers better performance, close to home, and at a lower cost.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	RDI Corporation	Exact match	Cincinnati, OH, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,615 contacts →
	Exact match “At RDI, we believe in winning smart by providing customized, strategic solutions to our clients.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	Full Potential Solutions	Exact match	Waltham, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,563 contacts →
	Exact match “Full Potential Solutions (FPS) is a new kind of performance-based outsourcing firm that puts culture and employees first, because we believe that happy, fulfilled teams accomplish…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Zanc Assessoria Nacional DE Cobrança	Exact match	São Paulo / Porto Alegre / Taquari, BrazilHQ recorded Nov 5, 2026	1,001-5,000	1,442 contacts →
	Exact match “A Zanc é uma Empresa de Teleatendimento que está no mercado desde 1972.+ informações acesse:” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	Ventas Y Servicios S.A	Exact match	Bogotá D.c., ColombiaHQ recorded Nov 5, 2026	1,001-5,000	1,332 contacts →
	Exact match “MISIÓN Somos una compañía de Contact Center y tercerización de procesos (Business Process Outsourcing BPO), rentable, con presencia nacional; que brinda soluciones ágiles y…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	The Office Gurus	Exact match	St Petersburg, RussiaHQ recorded Nov 5, 2026	1,001-5,000	1,318 contacts →
	Exact match “The Office Gurus (TOG) is a global call center and business process outsource provider of customer care, telemarketing, lead generation, appointment setting, order entry, accounts…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Peak Support	Exact match	Cambridge, MA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,278 contacts →
	Exact match “Peak Support: A Ubiquity Company is a business process outsourcing (BPO) company growing dedicated to providing exceptional support to high-growth companies.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	crystel.co	Exact match	Amman, JordanHQ recorded Nov 5, 2026	1,001-5,000	1,223 contacts →
	Exact match “Crystel emerged as a leading Outsourcing Service Provider (OSP) since its establishment in Jordan in early 2007.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Valor Global	Exact match	Phoenix, AZ, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,178 contacts →
	Exact match “Valor Global is a global leader in providing extraordinary customer experiences for clients across the globe.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Mindpearl	Exact match	Cape Town, South AfricaHQ recorded Nov 5, 2026	1,001-5,000	1,162 contacts →
	Exact match “We specialise in inbound multichannel customer support across multiple verticals from our quality, strategically located centres in Fiji, South Africa and Peru and via our work…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	Hrhnext Services Limited	Exact match	Hyderabad, IndiaHQ recorded Nov 5, 2026	1,001-5,000	1,132 contacts →
	Exact match “Even the markets know that we’re the good call’!” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	B2s Business Support Services	Exact match	Gennevilliers Cedex, FranceHQ recorded Nov 5, 2026	10001+	1,087 contacts →
	Exact match “Expert de la relation client depuis 1996, b2s est le N°1 de l’externalisation de votre relation client en qualité délivrée.” 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 “telemarketing 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 10,515 telemarketing services worldwide

See the full list, filter by size, metro and specialty, and access 21,516 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Telemarketing services worldwide at a glance

As of Nov 5, 2026

7.7%Verified-email coverage

26.6Average contacts per company

11-50Median size (employees)

1.6%Largest-city concentration · Lahore

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

3,234

11-50

3,720

51-200

2,219

201-500

758

501-1,000

254

1,001-5,000

213

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 telemarketing services are linked below.
What qualifies: Company records worldwide whose business descriptions match “telemarketing 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 21,516 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.

Telemarketing services by location

49 lists · largest first

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

How many telemarketing services are there worldwide?

RevenueBase identified 10,515 company matches for telemarketing 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?

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

Which country has the most telemarketing services?

The United States leads with 1,888 companies, followed by India (888) and Pakistan (695). Every telemarketing services list by country and city is linked on this page.

Which city has the most telemarketing services?

Lahore leads with 167 company records, followed by Rawalpindi (161) and London (130).

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 21,516 professional contacts with verified work emails tracked across these 10,515 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.