Company lists · Data refreshed September 2026

Top 25 Contact center consulting services worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 10,006 companies tracked

RevenueBase identified 10,006 contact center consulting services worldwide as of September 2026 and tracks 422,973 professional contacts across them, including 42,060 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers contact center consulting 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 27, 2026. Country and city lists for contact center consulting 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 27, 2026 86% judged on-target in blind review

10,006Companies

422,973Contacts tracked

42,060Verified emails

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The 25 largest contact center consulting services worldwide

Ranked by team size

Top 25 of 10,006 contact center consulting services worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to contact center consulting 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	Alorica	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	10001+	47,558 contacts →
	Indirect evidence “We’re passionate about creating customers for life by designing experiences that elevate your brand.” Source: RevenueBase Database · checked Sep 27, 2026
2	Transcom	Indirect evidence	Stockholm, SwedenHQ checked Sep 27, 2026	10001+	12,955 contacts →
	Indirect evidence “Transcom provides digitally enhanced customer experience (CX) services to some of the world's most ambitious brands.” Source: RevenueBase Database · checked Sep 27, 2026
3	Turkcell Global Bilgi	Indirect evidence	Beyoglu, TürkiyeHQ checked Sep 27, 2026	10001+	6,167 contacts →
	Indirect evidence “Bir Turkcell grup şirketi olarak yılında kurulduğumuzda amacımız hep eşsiz bir müşteri deneyimi yaşatmaktı.” Source: RevenueBase Database · checked Sep 27, 2026
4	Everise	Indirect evidence	Plantation, FL, United StatesHQ checked Sep 27, 2026	10001+	5,863 contacts →
	Indirect evidence “Everise delivers happiness to millions of customers around the world.” Source: RevenueBase Database · checked Sep 27, 2026
5	Afni, INC	Strong evidence	Bloomington, IL, United StatesHQ checked Sep 27, 2026	10001+	5,553 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 27, 2026
6	Eficacia	Indirect evidence	Cali, ColombiaHQ checked Sep 27, 2026	10001+	4,692 contacts →
	Indirect evidence “Incrementamos la productividad y eficiencia de nuestros clientes- Más de 40 años de experiencia en el mercado- Líderes en Soluciones de Mercadeo, Trade Marketing, Ventas y Gestión…” Source: RevenueBase Database · checked Sep 27, 2026
7	Call Center Services International	Strong evidence	San Diego, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	4,561 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 27, 2026
8	Apex America	Indirect evidence	Córdoba, ArgentinaHQ checked Sep 27, 2026	10001+	4,377 contacts →
	Indirect evidence “At Apex America, we are a Next Generation BPO and a global strategic partner specialized in elevating customer service standards.” Source: RevenueBase Database · checked Sep 27, 2026
9	Continuum Global Solutions	Strong evidence	Dallas, TX, United StatesHQ checked Sep 27, 2026	5,001-10,000	4,342 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 27, 2026
10	Callink	Partial evidence	Uberlândia, BrazilHQ checked Sep 27, 2026	5,001-10,000	4,126 contacts →
	Partial evidence “Mais que call center: soluções que transformam o seu negócio e a jornada dos clientes!” Source: RevenueBase Database · checked Sep 27, 2026
11	Vikstar Contact Center	Strong evidence	Sao Paulo, BrazilHQ checked Sep 27, 2026	10001+	3,914 contacts →
	Strong evidence “Vikstar is one of the biggest contact centers of Brazil.” Source: RevenueBase Database · checked Sep 27, 2026
12	Sercom	Strong evidence	Taboão Da Serra, BrazilHQ checked Sep 27, 2026	5,001-10,000	3,785 contacts →
	Strong evidence “Founded in 1993, since the beginning Sercom has stood out in the Contact Center Services.” Source: RevenueBase Database · checked Sep 27, 2026
13	GSS Global Sales Solutions	Indirect evidence	Madrid, SpainHQ checked Sep 27, 2026	10001+	3,716 contacts →
	Indirect evidence “is a tech company specialized in providing, and for.” Source: RevenueBase Database · checked Sep 27, 2026
14	Teleperformance Global Services	Indirect evidence	Kolkata, IndiaHQ checked Sep 27, 2026	1,001-5,000	3,346 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
15	TMKT	Strong evidence	Poa, BrazilHQ checked Sep 27, 2026	5,001-10,000	3,333 contacts →
	Strong evidence “A TMKT é uma empresa de Contact Center que foi fundada em 1991 e se tornou uma referência no mercado de Customer Experience (CX).” Source: RevenueBase Database · checked Sep 27, 2026
16	Quantrics Enterprises INC	Indirect evidence	Taytay, PhilippinesHQ checked Sep 27, 2026	5,001-10,000	3,132 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 27, 2026
17	Telvista	Partial evidence	Dallas, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	3,122 contacts →
	Partial evidence “Email: info@Telvista.com Telvista is a premier provider of contact solutions that drive customer loyalty and create competitive advantage for our clients.” Source: RevenueBase Database · checked Sep 27, 2026
18	Extensya	Strong evidence	Amman, JordanHQ checked Sep 27, 2026	1,001-5,000	3,071 contacts →
	Strong evidence “Extensya is a company that primarily specializes in contact management solutions and business process outsourcing services, with a network of fully equipped contact centers in…” Source: RevenueBase Database · checked Sep 27, 2026
19	EPX Eperformax Contact Centers	Strong evidence	Pasay City, PhilippinesHQ checked Sep 27, 2026	5,001-10,000	3,061 contacts →
	Strong 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 27, 2026
20	TEL Contact Center	Indirect evidence	Salvador, BrazilHQ checked Sep 27, 2026	10001+	3,027 contacts →
	Indirect evidence “Entre as 7 principais empresas de Gestão do Relacionamento com Cliente (CRM) do Brasil, há 30 anos a Tel inova no desenvolvimento de soluções customizadas, de alto valor, com um…” Source: RevenueBase Database · checked Sep 27, 2026
21	VGX Contact Center	Indirect evidence	Montes Claros, BrazilHQ checked Sep 27, 2026	1,001-5,000	2,951 contacts →
	Indirect evidence “A VGX, é uma empresa 100% brasileira, com 13 anos de atuação e mais de 5.100 colaboradores, consolidada como referência em soluções de Customer Experience,Cobrança, Atendimento…” Source: RevenueBase Database · checked Sep 27, 2026
22	Advanced Call Center Technologies, LLC	Partial evidence	Berwyn, PA, United StatesHQ checked Sep 27, 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 27, 2026
23	TAHTO	Partial evidence	Goiânia, BrazilHQ checked Sep 27, 2026	10001+	2,552 contacts →
	Partial evidence “Com 19 anos de experiência em CX e BPO, somos consultivos e entregamos soluções personalizadas que conectam pessoas e tecnologia para impulsionar seus resultados.” Source: RevenueBase Database · checked Sep 27, 2026
24	Emergia Contact Center	Strong evidence	Barcelona, SpainHQ checked Sep 27, 2026	5,001-10,000	2,358 contacts →
	Strong evidence “Emergia is a multinational company specialized in the comprehensive customer relationship management in the field of Interactive Contact Center, the business process outsourcing…” Source: RevenueBase Database · checked Sep 27, 2026
25	Nexa BPO	Strong evidence	Bogotá D.c, ColombiaHQ checked Sep 27, 2026	5,001-10,000	2,342 contacts →
	Strong 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 27, 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: contact center consulting 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 contact center consulting services.
Partial evidence: Its own public description names part of contact center consulting services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name contact center consulting 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 10,006 contact center consulting services worldwide

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Contact center consulting services worldwide at a glance

As of Sep 27, 2026

9.9%Verified-email coverage

42.3Average contacts per company

11-50Median size (employees)

1.7%Largest-city concentration · Sao Paulo

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

3,834

11-50

2,863

51-200

1,877

201-500

700

501-1,000

330

1,001-5,000

292

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 contact center consulting 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 contact center consulting services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “contact center consulting 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 contact center consulting 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 contact center consulting 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, 42,060 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 27, 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.

Contact center consulting services by location

57 lists · largest first

Every Contact center consulting 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 contact center consulting 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 contact center consulting services are there worldwide?

RevenueBase identified 10,006 contact center consulting 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?

Alorica, headquartered in Irvine, tops this list with the largest team on record.

Which country has the most contact center consulting services?

The United States leads with 1,802 companies, followed by India (575) and Brazil (488). Every contact center consulting services list by country and city is linked on this page.

Which city has the most contact center consulting services?

Sao Paulo leads with 167 headquartered companies, followed by London (122) and Lahore (82).

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 42,060 verified decision-maker contacts tracked across these 10,006 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 27, 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.