Company lists · Data refreshed September 2026

Top 25 Customer service consulting companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 30,826 companies tracked

RevenueBase identified 30,826 company matches for customer service consulting companies worldwide as of September 2026 and tracks 476,481 professional contacts across them, including 65,374 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for customer service consulting companies 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 19, 2026. Country and city lists for customer service consulting companies 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 19, 2026 How this list was built

30,826Companies

476,481Contacts tracked

65,374Verified emails

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The 25 largest customer service consulting companies worldwide

Ranked by team size

Top 25 of 30,826 company matches for customer service consulting companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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	Alorica	Exact match	Irvine, CA, United StatesHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
2	Sitel Group	Exact match	Miami, FL, United StatesHQ recorded Sep 19, 2026	10001+	35,365 contacts →
	Exact match “Foundever™ is a global leader in the customer experience (CX) industry.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Slalom	Exact match	Seattle, WA, United StatesHQ recorded Sep 19, 2026	10001+	10,032 contacts →
	Exact match “Slalom is a fiercely human business and technology consulting company that leads with outcomes to bring more value, in all ways, always.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Turkcell Global Bilgi	Exact match	Beyoglu, TürkiyeHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
5	Everise	Exact match	Plantation, FL, United StatesHQ recorded Sep 19, 2026	10001+	5,863 contacts →
	Exact match “Everise delivers happiness to millions of customers around the world.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	Qualfon	Exact match	Highland Park, MI, United StatesHQ recorded Sep 19, 2026	10001+	5,840 contacts →
	Exact match “Qualfon provides 360 degrees of customer experience support for your business with mission-driven processes that keep each person at the heart of every interaction.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Emtelco S.A	Exact match	Medellín, ColombiaHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
8	Fusion CX	Exact match	Norcross, GA, United StatesHQ recorded Sep 19, 2026	10001+	4,785 contacts →
	Exact match “At Fusion CX, we revolutionize customer experience by blending innovative technology and human connection.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Eficacia	Exact match	Cali, ColombiaHQ recorded Sep 19, 2026	10001+	4,692 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Management Solutions	Exact match	Madrid, SpainHQ recorded Sep 19, 2026	1,001-5,000	4,468 contacts →
	Exact match “Management Solutions is a leading provider of business consulting services for regulated industries.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Apex America	Exact match	Córdoba, ArgentinaHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
12	Callink	Exact match	Uberlândia, BrazilHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
13	SX Negócios	Exact match	Novo Hamburgo, BrazilHQ recorded Sep 19, 2026	5,001-10,000	4,020 contacts →
	Exact match “Somos a Pulse Client Experts, uma empresa em constante evolução, impulsionados pela vontade de fazer acontecer.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Raya CX	Exact match	Giza, EgyptHQ recorded Sep 19, 2026	5,001-10,000	3,989 contacts →
	Exact match “RAYA Customer Experience provides next-generation BPO and customer experience management on behalf of clients across various industries.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Brasil Center Comunicações	Exact match	n/a	5,001-10,000	3,979 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Harte Hanks	Exact match	Chelmsford, MA, United StatesHQ recorded Sep 19, 2026	1,001-5,000	3,901 contacts →
	Exact match “We are The Customer Company®, a global leader in Customer Experience (CX), Omnichannel Marketing, Data Services, Customer Care, Fulfillment, and Logistics.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	GSS Global Sales Solutions	Exact match	Madrid, SpainHQ recorded Sep 19, 2026	10001+	3,716 contacts →
	Exact match “is a tech company specialized in providing, and for.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Advanced Call Center Technologies, LLC	Exact match	Berwyn, PA, United StatesHQ recorded Sep 19, 2026	5,001-10,000	2,774 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 · Sep 19, 2026 · View company records in RevenueBase
19	TAHTO	Exact match	Goiânia, BrazilHQ recorded Sep 19, 2026	10001+	2,552 contacts →
	Exact match “Com 19 anos de experiência em CX e BPO, somos consultivos e entregamos soluções personalizadas que conectam pessoas e tecnologia para impulsionar seus resultados.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	1point1	Exact match	Navi Mumbai, IndiaHQ recorded Sep 19, 2026	5,001-10,000	2,392 contacts →
	Exact match “At 1Point1, we empower brands to explore new frontiers, hassle-free.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	CAT Technologies Argentina	Exact match	Buenos Aires, ArgentinaHQ recorded Sep 19, 2026	1,001-5,000	2,221 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 · Sep 19, 2026 · View company records in RevenueBase
22	Transcosmos INC	Exact match	Toshima-ku, JapanHQ recorded Sep 19, 2026	10001+	1,987 contacts →
	Exact match “transcosmos launched its operations in 1966.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	TSA Group - Australia	Exact match	West Perth, AustraliaHQ recorded Sep 19, 2026	1,001-5,000	1,818 contacts →
	Exact match “We’re Australia’s leading specialists in CX consultancy and services.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Op360 Officepartners360	Exact match	Ridgefield, CT, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,777 contacts →
	Exact match “OP360, part of iQor CXBPO™, is a trusted partner in intelligent customer experience solutions for global brands.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Nihilent	Exact match	Pune, IndiaHQ recorded Sep 19, 2026	1,001-5,000	1,703 contacts →
	Exact match “Nihilent is a Global Consulting and Services Company using a human-centred approach for problem-solving and change management, Nihilent’s comprehensive range of expertise in…” Recorded in the RevenueBase company graph · Sep 19, 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 consulting companies”. 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 30,826 customer service consulting companies worldwide

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Customer service consulting companies worldwide at a glance

As of Sep 19, 2026

13.7%Verified-email coverage

15.5Average contacts per company

1-10Median size (employees)

1.7%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

22,245

11-50

5,966

51-200

1,601

201-500

499

501-1,000

176

1,001-5,000

161

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 customer service consulting companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “customer service consulting companies” 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 65,374 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 19, 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 consulting companies by location

109 lists · largest first

Every Customer service consulting companies 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 consulting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many customer service consulting companies are there worldwide?

RevenueBase identified 30,826 company matches for customer service consulting companies 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?

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

Which country has the most customer service consulting companies?

The United States leads with 6,220 companies, followed by Brazil (1,837) and the United Kingdom (1,724). Every customer service consulting companies list by country and city is linked on this page.

Which city has the most customer service consulting companies?

London leads with 524 company records, followed by Sao Paulo (489) and Paris (355).

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 65,374 professional contacts with verified work emails tracked across these 30,826 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 19, 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.