Company lists · Data refreshed September 2026
Top 25 Call center and customer service firms worldwide
RevenueBase identified 5,327 company matches for call center and customer service firms worldwide as of September 2026 and tracks 245,296 professional contacts across them, including 20,605 with verified work emails. The United States is the largest market and Lahore the largest hub.
This list covers company matches for call center and customer service 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 27, 2026. Country and city lists for call center and customer service 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.
The 25 largest call center and customer service firms worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 27, 2026 · View company records in RevenueBase | |||||
| 2 | 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 27, 2026 · View company records in RevenueBase | |||||
| 3 | 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 27, 2026 · View company records in RevenueBase | |||||
| 4 | 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 27, 2026 · View company records in RevenueBase | |||||
| 5 | 3,914 contacts → | ||||
Exact match “Vikstar is one of the biggest contact centers of Brazil.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 6 | 3,785 contacts → | ||||
Exact match “Founded in 1993, since the beginning Sercom has stood out in the Contact Center Services.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 7 | 3,716 contacts → | ||||
Exact match “is a tech company specialized in providing, and for.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 8 | 3,346 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 9 | 3,132 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 · Sep 27, 2026 · View company records in RevenueBase | |||||
| 10 | 3,122 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 · Sep 27, 2026 · View company records in RevenueBase | |||||
| 11 | 3,061 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 · Sep 27, 2026 · View company records in RevenueBase | |||||
| 12 | 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 27, 2026 · View company records in RevenueBase | |||||
| 13 | 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 27, 2026 · View company records in RevenueBase | |||||
| 14 | 2,026 contacts → | ||||
Exact match “Human-Led, Tech-Powered Customer Service For over 25 years, Liveops has redefined customer support by combining technology with real human connection.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 15 | 1,764 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 · Sep 27, 2026 · View company records in RevenueBase | |||||
| 16 | 1,762 contacts → | ||||
Exact match “Transforming Customer Experiences Worldwide** At Technotask, we've embarked on a journey of exponential growth and innovation since our inception in March 2020.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 17 | 1,741 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 · Sep 27, 2026 · View company records in RevenueBase | |||||
| 18 | 1,711 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 · Sep 27, 2026 · View company records in RevenueBase | |||||
| 19 | 1,710 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 · Sep 27, 2026 · View company records in RevenueBase | |||||
| 20 | 1,536 contacts → | ||||
Exact match “DialAmerica is now Aucera.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 21 | 1,473 contacts → | ||||
Exact match “Senture provides comprehensive contact center service support nationally.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 22 | 1,418 contacts → | ||||
Exact match “DATAMARK Inc, a provider of omni-channel contact centers and business process outsourcing (BPO) services since 1989, employs more than at our facilities in the United States…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 23 | 1,312 contacts → | ||||
Exact match “A dbm Contact Center foi fundada em 1996 e possui sede própria em Curitiba.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 24 | 1,306 contacts → | ||||
Exact match “At Unisono, for more than 20 years we have been working side by side with our customers across the globe to meet their demands as well as our own.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 25 | 1,292 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 27, 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 and customer service 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 5,327 call center and customer service firms worldwide
See the full list, filter by size, metro and specialty, and access 20,605 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Call center and customer service firms worldwide at a glance
As of Sep 27, 2026Companies by employee count
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 and customer service firms are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “call center and customer service 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 20,605 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 27, 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 and customer service firms by location
22 lists · largest firstEvery Call center and customer service firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Call center and customer service firms based in the United States930
- Call center and customer service firms based in India330
- Call center and customer service firms based in the United Kingdom175
- Call center and customer service firms based in the Philippines161
- Call center and customer service firms based in Brazil151
- Call center and customer service firms based in Italy147
- Call center and customer service firms based in Germany140
- Call center and customer service firms based in Canada137
- Call center and customer service firms based in France119
- Call center and customer service firms based in Mexico106
- Call center and customer service firms based in Spain100
- Call center and customer service firms based in the Netherlands90
- Call center and customer service firms based in Türkiye79
- Call center and customer service firms based in Egypt59
- Call center and customer service firms based in Colombia55
- Call center and customer service firms based in Argentina51
- Call center and customer service firms based in Poland47
- Call center and customer service firms based in South Africa46
- Call center and customer service firms based in Australia30
- Call center and customer service firms based in Belgium27
- Call center and customer service firms based in Israel26
- Call center and customer service firms based in Sweden26
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 and customer service firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many call center and customer service firms are there worldwide?
RevenueBase identified 5,327 company matches for call center and customer service 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?
Turkcell Global Bilgi tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most call center and customer service firms?
The United States leads with 930 companies, followed by India (330) and the United Kingdom (175). Every call center and customer service firms list by country and city is linked on this page.
Which city has the most call center and customer service firms?
Lahore leads with 86 company records, followed by Rawalpindi (70) and Islamabad (43).
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 20,605 professional contacts with verified work emails tracked across these 5,327 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 27, 2026.
Ready to reach these companies? Verified emails and direct dials for all 5,327 call center and customer service firms worldwide. Start with a free account, no credit card.
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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.
More company lists
Company intelligence · public preview
Top 25 call center and customer service firms worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 5,327 matching company records for call center and customer service firms worldwide, with 245,296 tracked contacts and 20,605 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 27, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 call center and customer service firms worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Turkcell Global Bilgiglobalbilgi.com.trHQ: Beyoglu, TürkiyeReported employees: 10001+ | Beyoglu, Türkiye | 10001+ | Exact match | 6,167 contacts → |
“Bir Turkcell grup şirketi olarak yılında kurulduğumuzda amacımız hep eşsiz bir müşteri deneyimi yaşatmaktı.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Afni, INCafni.comHQ: Bloomington, IL, United StatesReported employees: 10001+ | Bloomington, IL, United States | 10001+ | Exact match | 5,553 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Emtelco S.Aemtelco.com.coHQ: Medellín, ColombiaReported employees: 10001+ | Medellín, Colombia | 10001+ | Exact match | 4,998 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Continuum Global Solutionscontinuumgbl.comHQ: Dallas, TX, United StatesReported employees: 5,001-10,000 | Dallas, TX, United States | 5,001-10,000 | Exact match | 4,342 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Vikstar Contact Centervikstar.com.brHQ: Sao Paulo, BrazilReported employees: 10001+ | Sao Paulo, Brazil | 10001+ | Exact match | 3,914 contacts → |
“Vikstar is one of the biggest contact centers of Brazil.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Sercomsercom.com.brHQ: Taboão Da Serra, BrazilReported employees: 5,001-10,000 | Taboão Da Serra, Brazil | 5,001-10,000 | Exact match | 3,785 contacts → |
“Founded in 1993, since the beginning Sercom has stood out in the Contact Center Services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  GSS Global Sales Solutionscovisian.comHQ: Madrid, SpainReported employees: 10001+ | Madrid, Spain | 10001+ | Exact match | 3,716 contacts → |
“is a tech company specialized in providing, and for.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Teleperformance Global Servicesteleperformancecareers.com HQ: Kolkata, IndiaReported employees: 1,001-5,000 | Kolkata, India | 1,001-5,000 | Exact match | 3,346 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 9 |  Quantrics Enterprises INCquantrics.comHQ: Taytay, PhilippinesReported employees: 5,001-10,000 | Taytay, Philippines | 5,001-10,000 | Exact match | 3,132 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Telvistatelvista.comHQ: Dallas, TX, United StatesReported employees: 1,001-5,000 | Dallas, TX, United States | 1,001-5,000 | Exact match | 3,122 contacts → |
“Email: info@Telvista.com Telvista is a premier provider of contact solutions that drive customer loyalty and create competitive advantage for our clients.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  EPX Eperformax Contact Centerseperformax.comHQ: Pasay City, PhilippinesReported employees: 5,001-10,000 | Pasay City, Philippines | 5,001-10,000 | Exact match | 3,061 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Advanced Call Center Technologies, LLCacttoday.comHQ: Berwyn, PA, United StatesReported employees: 5,001-10,000 | Berwyn, PA, United States | 5,001-10,000 | Exact match | 2,774 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  CAT Technologies Argentinacat-technologies.comHQ: Buenos Aires, ArgentinaReported employees: 1,001-5,000 | Buenos Aires, Argentina | 1,001-5,000 | Exact match | 2,221 contacts → |
“Somos la compañía líder en Servicios Next Gen de Contact Center, Business Process Outsourcing (BPO) y Customer Experience (CX).” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Liveops, INCliveops.comHQ: San Francisco, CA, United StatesReported employees: Not recorded | San Francisco, CA, United States | Not recorded | Exact match | 2,026 contacts → |
“Human-Led, Tech-Powered Customer Service For over 25 years, Liveops has redefined customer support by combining technology with real human connection.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Infocision Management Corporationinfocision.comHQ: Akron, OH, United StatesReported employees: 1,001-5,000 | Akron, OH, United States | 1,001-5,000 | Exact match | 1,764 contacts → |
“InfoCision is an award-winning contact center partner trusted by leading brands for over 40 years.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Technotask Business Solutions PVT LTDtechnotaskglobal.comHQ: Bhopal, IndiaReported employees: 1,001-5,000 | Bhopal, India | 1,001-5,000 | Exact match | 1,762 contacts → |
“Transforming Customer Experiences Worldwide** At Technotask, we've embarked on a journey of exponential growth and innovation since our inception in March 2020.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Km2 Solutionskm2solutions.comHQ: Boca Raton, FL, United StatesReported employees: 5,001-10,000 | Boca Raton, FL, United States | 5,001-10,000 | Exact match | 1,741 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Supportninjasupportninja.comHQ: Austin, TX, United StatesReported employees: 1,001-5,000 | Austin, TX, United States | 1,001-5,000 | Exact match | 1,711 contacts → |
“SupportNinja provides customer experience and back-office support services for tech companies and startups around the world.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Support Services Groupsupportservicesgroup.coHQ: Waco, TX, United StatesReported employees: 5,001-10,000 | Waco, TX, United States | 5,001-10,000 | Exact match | 1,710 contacts → |
“Support Services Group (SSG) helps businesses accelerate growth and earn customers for life through high-touch, outsourced engagement center services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Dialamericaaucera.comHQ: Mahwah, NJ, United StatesReported employees: 1,001-5,000 | Mahwah, NJ, United States | 1,001-5,000 | Exact match | 1,536 contacts → |
“DialAmerica is now Aucera.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Senture, LLCsenture.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,473 contacts → |
“Senture provides comprehensive contact center service support nationally.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Datamark, INCdatamark.netHQ: El Paso, TX, United StatesReported employees: 1,001-5,000 | El Paso, TX, United States | 1,001-5,000 | Exact match | 1,418 contacts → |
“DATAMARK Inc, a provider of omni-channel contact centers and business process outsourcing (BPO) services since 1989, employs more than at our facilities in the United States…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | DBM Contact Centerdbm.com.br HQ: Curitiba, BrazilReported employees: 1,001-5,000 | Curitiba, Brazil | 1,001-5,000 | Exact match | 1,312 contacts → |
“A dbm Contact Center foi fundada em 1996 e possui sede própria em Curitiba.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Grupo Unísonointelcia.esHQ: Madrid, SpainReported employees: Not recorded | Madrid, Spain | Not recorded | Exact match | 1,306 contacts → |
“At Unisono, for more than 20 years we have been working side by side with our customers across the globe to meet their demands as well as our own.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Brasilcenterbrasilcenter.com.br HQ: BrazilReported employees: Not recorded | Brazil | Not recorded | Exact match | 1,292 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 25 of 5,327 company matches
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Call center and customer service firms: dataset insights
September 27, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
5,313 records in the displayed employee bands.
14 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 5,327 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 27, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Call center and customer service firms by location
22 lists · largest firstEvery Call center and customer service firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Call center and customer service firms based in the United States930
- Call center and customer service firms based in India330
- Call center and customer service firms based in the United Kingdom175
- Call center and customer service firms based in the Philippines161
- Call center and customer service firms based in Brazil151
- Call center and customer service firms based in Italy147
- Call center and customer service firms based in Germany140
- Call center and customer service firms based in Canada137
- Call center and customer service firms based in France119
- Call center and customer service firms based in Mexico106
- Call center and customer service firms based in Spain100
- Call center and customer service firms based in the Netherlands90
- Call center and customer service firms based in Türkiye79
- Call center and customer service firms based in Egypt59
- Call center and customer service firms based in Colombia55
- Call center and customer service firms based in Argentina51
- Call center and customer service firms based in Poland47
- Call center and customer service firms based in South Africa46
- Call center and customer service firms based in Australia30
- Call center and customer service firms based in Belgium27
- Call center and customer service firms based in Israel26
- Call center and customer service firms based in Sweden26
Questions about this company list
What does Exact match mean for call center and customer service firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many call center and customer service firms did RevenueBase find worldwide?
The saved snapshot records 5,327 matching company records, 245,296 tracked contacts and 20,605 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 27, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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RevenueBase Data Team. Top 25 call center and customer service firms worldwide. Snapshot: September 27, 2026. https://revenuebase.ai/companies/browse/call-center-and-customer-service-firms.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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Top 25 call center and customer service firms worldwide
RevenueBase records 5,327 matching company records for call center and customer service firms worldwide, with 245,296 tracked contacts and 20,605 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 27, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 call center and customer service firms worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Turkcell Global Bilgiglobalbilgi.com.tr HQ: Beyoglu, TürkiyeReported employees: 10001+ | Beyoglu, Türkiye | 10001+ | Exact match | 6,167 contacts → |
“Bir Turkcell grup şirketi olarak yılında kurulduğumuzda amacımız hep eşsiz bir müşteri deneyimi yaşatmaktı.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Afni, INCafni.com HQ: Bloomington, IL, United StatesReported employees: 10001+ | Bloomington, IL, United States | 10001+ | Exact match | 5,553 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Emtelco S.Aemtelco.com.co HQ: Medellín, ColombiaReported employees: 10001+ | Medellín, Colombia | 10001+ | Exact match | 4,998 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Continuum Global Solutionscontinuumgbl.com HQ: Dallas, TX, United StatesReported employees: 5,001-10,000 | Dallas, TX, United States | 5,001-10,000 | Exact match | 4,342 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Vikstar Contact Centervikstar.com.br HQ: Sao Paulo, BrazilReported employees: 10001+ | Sao Paulo, Brazil | 10001+ | Exact match | 3,914 contacts → |
“Vikstar is one of the biggest contact centers of Brazil.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Sercomsercom.com.br HQ: Taboão Da Serra, BrazilReported employees: 5,001-10,000 | Taboão Da Serra, Brazil | 5,001-10,000 | Exact match | 3,785 contacts → |
“Founded in 1993, since the beginning Sercom has stood out in the Contact Center Services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | GSS Global Sales Solutionscovisian.com HQ: Madrid, SpainReported employees: 10001+ | Madrid, Spain | 10001+ | Exact match | 3,716 contacts → |
“is a tech company specialized in providing, and for.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Teleperformance Global Servicesteleperformancecareers.com HQ: Kolkata, IndiaReported employees: 1,001-5,000 | Kolkata, India | 1,001-5,000 | Exact match | 3,346 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 9 | Quantrics Enterprises INCquantrics.com HQ: Taytay, PhilippinesReported employees: 5,001-10,000 | Taytay, Philippines | 5,001-10,000 | Exact match | 3,132 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Telvistatelvista.com HQ: Dallas, TX, United StatesReported employees: 1,001-5,000 | Dallas, TX, United States | 1,001-5,000 | Exact match | 3,122 contacts → |
“Email: info@Telvista.com Telvista is a premier provider of contact solutions that drive customer loyalty and create competitive advantage for our clients.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | EPX Eperformax Contact Centerseperformax.com HQ: Pasay City, PhilippinesReported employees: 5,001-10,000 | Pasay City, Philippines | 5,001-10,000 | Exact match | 3,061 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Advanced Call Center Technologies, LLCacttoday.com HQ: Berwyn, PA, United StatesReported employees: 5,001-10,000 | Berwyn, PA, United States | 5,001-10,000 | Exact match | 2,774 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | CAT Technologies Argentinacat-technologies.com HQ: Buenos Aires, ArgentinaReported employees: 1,001-5,000 | Buenos Aires, Argentina | 1,001-5,000 | Exact match | 2,221 contacts → |
“Somos la compañía líder en Servicios Next Gen de Contact Center, Business Process Outsourcing (BPO) y Customer Experience (CX).” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Liveops, INCliveops.com HQ: San Francisco, CA, United StatesReported employees: Not recorded | San Francisco, CA, United States | Not recorded | Exact match | 2,026 contacts → |
“Human-Led, Tech-Powered Customer Service For over 25 years, Liveops has redefined customer support by combining technology with real human connection.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Infocision Management Corporationinfocision.com HQ: Akron, OH, United StatesReported employees: 1,001-5,000 | Akron, OH, United States | 1,001-5,000 | Exact match | 1,764 contacts → |
“InfoCision is an award-winning contact center partner trusted by leading brands for over 40 years.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Technotask Business Solutions PVT LTDtechnotaskglobal.com HQ: Bhopal, IndiaReported employees: 1,001-5,000 | Bhopal, India | 1,001-5,000 | Exact match | 1,762 contacts → |
“Transforming Customer Experiences Worldwide** At Technotask, we've embarked on a journey of exponential growth and innovation since our inception in March 2020.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Km2 Solutionskm2solutions.com HQ: Boca Raton, FL, United StatesReported employees: 5,001-10,000 | Boca Raton, FL, United States | 5,001-10,000 | Exact match | 1,741 contacts → |
“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 description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Supportninjasupportninja.com HQ: Austin, TX, United StatesReported employees: 1,001-5,000 | Austin, TX, United States | 1,001-5,000 | Exact match | 1,711 contacts → |
“SupportNinja provides customer experience and back-office support services for tech companies and startups around the world.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Support Services Groupsupportservicesgroup.co HQ: Waco, TX, United StatesReported employees: 5,001-10,000 | Waco, TX, United States | 5,001-10,000 | Exact match | 1,710 contacts → |
“Support Services Group (SSG) helps businesses accelerate growth and earn customers for life through high-touch, outsourced engagement center services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Dialamericaaucera.com HQ: Mahwah, NJ, United StatesReported employees: 1,001-5,000 | Mahwah, NJ, United States | 1,001-5,000 | Exact match | 1,536 contacts → |
“DialAmerica is now Aucera.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Senture, LLCsenture.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,473 contacts → |
“Senture provides comprehensive contact center service support nationally.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Datamark, INCdatamark.net HQ: El Paso, TX, United StatesReported employees: 1,001-5,000 | El Paso, TX, United States | 1,001-5,000 | Exact match | 1,418 contacts → |
“DATAMARK Inc, a provider of omni-channel contact centers and business process outsourcing (BPO) services since 1989, employs more than at our facilities in the United States…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | DBM Contact Centerdbm.com.br HQ: Curitiba, BrazilReported employees: 1,001-5,000 | Curitiba, Brazil | 1,001-5,000 | Exact match | 1,312 contacts → |
“A dbm Contact Center foi fundada em 1996 e possui sede própria em Curitiba.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Grupo Unísonointelcia.es HQ: Madrid, SpainReported employees: Not recorded | Madrid, Spain | Not recorded | Exact match | 1,306 contacts → |
“At Unisono, for more than 20 years we have been working side by side with our customers across the globe to meet their demands as well as our own.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Brasilcenterbrasilcenter.com.br HQ: BrazilReported employees: Not recorded | Brazil | Not recorded | Exact match | 1,292 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 25 of 5,327 company matches
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Call center and customer service firms: dataset insights
September 27, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
5,313 records in the displayed employee bands.
14 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 5,327 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 27, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Call center and customer service firms by location
22 lists · largest firstEvery Call center and customer service firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Call center and customer service firms based in the United States930
- Call center and customer service firms based in India330
- Call center and customer service firms based in the United Kingdom175
- Call center and customer service firms based in the Philippines161
- Call center and customer service firms based in Brazil151
- Call center and customer service firms based in Italy147
- Call center and customer service firms based in Germany140
- Call center and customer service firms based in Canada137
- Call center and customer service firms based in France119
- Call center and customer service firms based in Mexico106
- Call center and customer service firms based in Spain100
- Call center and customer service firms based in the Netherlands90
- Call center and customer service firms based in Türkiye79
- Call center and customer service firms based in Egypt59
- Call center and customer service firms based in Colombia55
- Call center and customer service firms based in Argentina51
- Call center and customer service firms based in Poland47
- Call center and customer service firms based in South Africa46
- Call center and customer service firms based in Australia30
- Call center and customer service firms based in Belgium27
- Call center and customer service firms based in Israel26
- Call center and customer service firms based in Sweden26
Questions about this company list
What does Exact match mean for call center and customer service firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many call center and customer service firms did RevenueBase find worldwide?
The saved snapshot records 5,327 matching company records, 245,296 tracked contacts and 20,605 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 27, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 call center and customer service firms worldwide. Snapshot: September 27, 2026. https://revenuebase.ai/companies/browse/call-center-and-customer-service-firms.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗