Company lists · Data refreshed September 2026
Top 25 Call center outsourcers worldwide
RevenueBase identified 8,731 company matches for call center outsourcers worldwide as of September 2026 and tracks 437,724 professional contacts across them, including 36,037 with verified work emails. The United States is the largest market and Lahore the largest hub.
This list covers company matches for call center outsourcers 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 outsourcers 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 outsourcers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 14,745 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 · Sep 27, 2026 · View company records in RevenueBase | |||||
| 2 | 13,214 contacts → | ||||
Exact match “Intelcia is a global player in outsourcing, which has supported its clients for 20 years combining talents, technologies, and processes to offer a tailor-made service and skills…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 3 | 9,614 contacts → | ||||
Exact match “We're KONECTA now!” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 4 | 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 | |||||
| 5 | 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 | |||||
| 6 | 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 | |||||
| 7 | 4,389 contacts → | ||||
Exact match “Startek is a leading global provider of technology-enabled business process outsourcing solutions.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 8 | 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 27, 2026 · View company records in RevenueBase | |||||
| 9 | 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 | |||||
| 10 | 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 27, 2026 · View company records in RevenueBase | |||||
| 11 | 3,979 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 12 | 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 | |||||
| 13 | 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 | |||||
| 14 | 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 | |||||
| 15 | 3,346 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 16 | 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 | |||||
| 17 | 3,071 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 18 | 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 | |||||
| 19 | 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 | |||||
| 20 | 2,772 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 · Sep 27, 2026 · View company records in RevenueBase | |||||
| 21 | 2,388 contacts → | ||||
Exact match “Expert Global Solutions is now part of Alorica.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 22 | 2,342 contacts → | ||||
Exact match “Más que un contact center y BPO, somos el partner que asegura que la experiencia de tus clientes sea increíble.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 23 | 2,245 contacts → | ||||
Exact match “OneLink is the premier partner in outsourced omnichannel customer experience services.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 24 | 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 | |||||
| 25 | 2,176 contacts → | ||||
Exact match “Somos a Tahto, uma empresa referência em soluções de CX e BPO.” 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 outsourcers”. 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 8,731 call center outsourcers worldwide
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Call center outsourcers 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 outsourcers are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “call center outsourcers” 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 36,037 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 outsourcers by location
36 lists · largest firstEvery Call center outsourcers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Call center outsourcers based in the United States1,436
- Call center outsourcers based in India909
- Call center outsourcers based in Pakistan624
- Call center outsourcers based in the Philippines459
- Call center outsourcers based in the United Kingdom287
- Call center outsourcers based in Brazil187
- Call center outsourcers based in Canada165
- Call center outsourcers based in France160
- Call center outsourcers based in Germany160
- Call center outsourcers based in Italy158
- Call center outsourcers based in Morocco142
- Call center outsourcers based in Mexico133
- Call center outsourcers based in Egypt116
- Call center outsourcers based in the Netherlands110
- Call center outsourcers based in Spain109
- Call center outsourcers based in South Africa108
- Call center outsourcers based in Colombia90
- Call center outsourcers based in Australia84
- Call center outsourcers based in Türkiye75
- Call center outsourcers based in Poland62
- Call center outsourcers based in Argentina59
- Call center outsourcers based in Tunisia52
- Call center outsourcers based in the Dominican Republic48
- Call center outsourcers based in Romania41
- Call center outsourcers based in Belgium36
- Call center outsourcers based in Chile34
- Call center outsourcers based in Israel30
- Call center outsourcers based in Greece29
- Call center outsourcers based in Ireland25
Cities
- Call center outsourcers based in Lahore, Pakistan199
- Call center outsourcers based in Noida, India74
- Call center outsourcers based in Bangalore, India60
- Call center outsourcers based in New York, United States49
- Call center outsourcers based in Miami, United States33
- Call center outsourcers based in Houston, United States32
- Call center outsourcers based in Austin, United States26
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 outsourcers”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many call center outsourcers are there worldwide?
RevenueBase identified 8,731 company matches for call center outsourcers 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?
Ienergizer tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most call center outsourcers?
The United States leads with 1,436 companies, followed by India (909) and Pakistan (624). Every call center outsourcers list by country and city is linked on this page.
Which city has the most call center outsourcers?
Lahore leads with 199 company records, followed by Rawalpindi (125) and Karachi (96).
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 36,037 professional contacts with verified work emails tracked across these 8,731 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.
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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 outsourcers worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 8,731 matching company records for call center outsourcers worldwide, with 437,724 tracked contacts and 36,037 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 outsourcers 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 |  Ienergizerienergizerbpo.comHQ: Noida, IndiaReported employees: 10001+ | Noida, India | 10001+ | Exact match | 14,745 contacts → |
“iEnergizer is a leading Business Process Outsourcing provider (“BPO”) of customer management solutions dedicated to delivering performance while actively supporting and advocating…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Intelciaintelcia.comHQ: Casablanca, MoroccoReported employees: 10001+ | Casablanca, Morocco | 10001+ | Exact match | 13,214 contacts → |
“Intelcia is a global player in outsourcing, which has supported its clients for 20 years combining talents, technologies, and processes to offer a tailor-made service and skills…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Comdata Groupkonecta-group.comHQ: Corsico, ItalyReported employees: 10001+ | Corsico, Italy | 10001+ | Exact match | 9,614 contacts → |
“We're KONECTA now!” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  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. | |||||
| 5 |  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. | |||||
| 6 |  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. | |||||
| 7 |  Startek Indiastartek.comHQ: Mumbai, IndiaReported employees: 10001+ | Mumbai, India | 10001+ | Exact match | 4,389 contacts → |
“Startek is a leading global provider of technology-enabled business process outsourcing solutions.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Apex Americaapexamerica.comHQ: Córdoba, ArgentinaReported employees: 10001+ | Córdoba, Argentina | 10001+ | Exact match | 4,377 contacts → |
“At Apex America, we are a Next Generation BPO and a global strategic partner specialized in elevating customer service standards.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  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. | |||||
| 10 |  Callinkcallink.com.brHQ: Uberlândia, BrazilReported employees: 5,001-10,000 | Uberlândia, Brazil | 5,001-10,000 | Exact match | 4,126 contacts → |
“Mais que call center: soluções que transformam o seu negócio e a jornada dos clientes!” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Brasil Center Comunicaçõesbrasilcenter.com.br HQ: HQ not recordedReported employees: 5,001-10,000 | HQ not recorded | 5,001-10,000 | Exact match | 3,979 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 12 |  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. | |||||
| 13 |  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. | |||||
| 14 |  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. | |||||
| 15 | 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. | |||||
| 16 |  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. | |||||
| 17 |  Extensyaextensya.comHQ: Amman, JordanReported employees: 1,001-5,000 | Amman, Jordan | 1,001-5,000 | Exact match | 3,071 contacts → |
“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…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  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. | |||||
| 19 |  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. | |||||
| 20 |  Stream Global Servicesstream.comHQ: Eagan, MN, United StatesReported employees: 10001+ | Eagan, MN, United States | 10001+ | Exact match | 2,772 contacts → |
“Stream Global Services is a premium business process outsource (BPO) service provider specializing in customer relationship management solutions including sales, customer care…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Expert Global Solutions NOW Aloricaalorica.comHQ: United StatesReported employees: 10001+ | United States | 10001+ | Exact match | 2,388 contacts → |
“Expert Global Solutions is now part of Alorica.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Nexa BPOnexabpo.comHQ: Bogotá D.c, ColombiaReported employees: 5,001-10,000 | Bogotá D.c, Colombia | 5,001-10,000 | Exact match | 2,342 contacts → |
“Más que un contact center y BPO, somos el partner que asegura que la experiencia de tus clientes sea increíble.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Webhelp Onelinkwebhelp.comHQ: Guatemala, United StatesReported employees: 10001+ | Guatemala, United States | 10001+ | Exact match | 2,245 contacts → |
“OneLink is the premier partner in outsourced omnichannel customer experience services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  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. | |||||
| 25 |  Vemsertahtotahto.com.brHQ: Goiania, BrazilReported employees: 5,001-10,000 | Goiania, Brazil | 5,001-10,000 | Exact match | 2,176 contacts → |
“Somos a Tahto, uma empresa referência em soluções de CX e BPO.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 8,731 company matches
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Call center outsourcers: 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
8,712 records in the displayed employee bands.
19 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 8,731 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 outsourcers by location
36 lists · largest firstEvery Call center outsourcers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Call center outsourcers based in the United States1,436
- Call center outsourcers based in India909
- Call center outsourcers based in Pakistan624
- Call center outsourcers based in the Philippines459
- Call center outsourcers based in the United Kingdom287
- Call center outsourcers based in Brazil187
- Call center outsourcers based in Canada165
- Call center outsourcers based in France160
- Call center outsourcers based in Germany160
- Call center outsourcers based in Italy158
- Call center outsourcers based in Morocco142
- Call center outsourcers based in Mexico133
- Call center outsourcers based in Egypt116
- Call center outsourcers based in the Netherlands110
- Call center outsourcers based in Spain109
- Call center outsourcers based in South Africa108
- Call center outsourcers based in Colombia90
- Call center outsourcers based in Australia84
- Call center outsourcers based in Türkiye75
- Call center outsourcers based in Poland62
- Call center outsourcers based in Argentina59
- Call center outsourcers based in Tunisia52
- Call center outsourcers based in the Dominican Republic48
- Call center outsourcers based in Romania41
- Call center outsourcers based in Belgium36
- Call center outsourcers based in Chile34
- Call center outsourcers based in Israel30
- Call center outsourcers based in Greece29
- Call center outsourcers based in Ireland25
Cities
- Call center outsourcers based in Lahore, Pakistan199
- Call center outsourcers based in Noida, India74
- Call center outsourcers based in Bangalore, India60
- Call center outsourcers based in New York, United States49
- Call center outsourcers based in Miami, United States33
- Call center outsourcers based in Houston, United States32
- Call center outsourcers based in Austin, United States26
Questions about this company list
What does Exact match mean for call center outsourcers?
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 outsourcers did RevenueBase find worldwide?
The saved snapshot records 8,731 matching company records, 437,724 tracked contacts and 36,037 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.
Related lists
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 call center outsourcers worldwide. Snapshot: September 27, 2026. https://revenuebase.ai/companies/browse/call-center-outsourcers.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 25 call center outsourcers worldwide
RevenueBase records 8,731 matching company records for call center outsourcers worldwide, with 437,724 tracked contacts and 36,037 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 outsourcers 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 | Ienergizerienergizerbpo.com HQ: Noida, IndiaReported employees: 10001+ | Noida, India | 10001+ | Exact match | 14,745 contacts → |
“iEnergizer is a leading Business Process Outsourcing provider (“BPO”) of customer management solutions dedicated to delivering performance while actively supporting and advocating…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Intelciaintelcia.com HQ: Casablanca, MoroccoReported employees: 10001+ | Casablanca, Morocco | 10001+ | Exact match | 13,214 contacts → |
“Intelcia is a global player in outsourcing, which has supported its clients for 20 years combining talents, technologies, and processes to offer a tailor-made service and skills…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Comdata Groupkonecta-group.com HQ: Corsico, ItalyReported employees: 10001+ | Corsico, Italy | 10001+ | Exact match | 9,614 contacts → |
“We're KONECTA now!” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | 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. | |||||
| 5 | 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. | |||||
| 6 | 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. | |||||
| 7 | Startek Indiastartek.com HQ: Mumbai, IndiaReported employees: 10001+ | Mumbai, India | 10001+ | Exact match | 4,389 contacts → |
“Startek is a leading global provider of technology-enabled business process outsourcing solutions.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Apex Americaapexamerica.com HQ: Córdoba, ArgentinaReported employees: 10001+ | Córdoba, Argentina | 10001+ | Exact match | 4,377 contacts → |
“At Apex America, we are a Next Generation BPO and a global strategic partner specialized in elevating customer service standards.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | 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. | |||||
| 10 | Callinkcallink.com.br HQ: Uberlândia, BrazilReported employees: 5,001-10,000 | Uberlândia, Brazil | 5,001-10,000 | Exact match | 4,126 contacts → |
“Mais que call center: soluções que transformam o seu negócio e a jornada dos clientes!” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Brasil Center Comunicaçõesbrasilcenter.com.br HQ: HQ not recordedReported employees: 5,001-10,000 | HQ not recorded | 5,001-10,000 | Exact match | 3,979 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 12 | 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. | |||||
| 13 | 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. | |||||
| 14 | 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. | |||||
| 15 | 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. | |||||
| 16 | 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. | |||||
| 17 | Extensyaextensya.com HQ: Amman, JordanReported employees: 1,001-5,000 | Amman, Jordan | 1,001-5,000 | Exact match | 3,071 contacts → |
“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…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | 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. | |||||
| 19 | 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. | |||||
| 20 | Stream Global Servicesstream.com HQ: Eagan, MN, United StatesReported employees: 10001+ | Eagan, MN, United States | 10001+ | Exact match | 2,772 contacts → |
“Stream Global Services is a premium business process outsource (BPO) service provider specializing in customer relationship management solutions including sales, customer care…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Expert Global Solutions NOW Aloricaalorica.com HQ: United StatesReported employees: 10001+ | United States | 10001+ | Exact match | 2,388 contacts → |
“Expert Global Solutions is now part of Alorica.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Nexa BPOnexabpo.com HQ: Bogotá D.c, ColombiaReported employees: 5,001-10,000 | Bogotá D.c, Colombia | 5,001-10,000 | Exact match | 2,342 contacts → |
“Más que un contact center y BPO, somos el partner que asegura que la experiencia de tus clientes sea increíble.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Webhelp Onelinkwebhelp.com HQ: Guatemala, United StatesReported employees: 10001+ | Guatemala, United States | 10001+ | Exact match | 2,245 contacts → |
“OneLink is the premier partner in outsourced omnichannel customer experience services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | 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. | |||||
| 25 | Vemsertahtotahto.com.br HQ: Goiania, BrazilReported employees: 5,001-10,000 | Goiania, Brazil | 5,001-10,000 | Exact match | 2,176 contacts → |
“Somos a Tahto, uma empresa referência em soluções de CX e BPO.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 8,731 company matches
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Call center outsourcers: 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
8,712 records in the displayed employee bands.
19 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 8,731 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 outsourcers by location
36 lists · largest firstEvery Call center outsourcers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Call center outsourcers based in the United States1,436
- Call center outsourcers based in India909
- Call center outsourcers based in Pakistan624
- Call center outsourcers based in the Philippines459
- Call center outsourcers based in the United Kingdom287
- Call center outsourcers based in Brazil187
- Call center outsourcers based in Canada165
- Call center outsourcers based in France160
- Call center outsourcers based in Germany160
- Call center outsourcers based in Italy158
- Call center outsourcers based in Morocco142
- Call center outsourcers based in Mexico133
- Call center outsourcers based in Egypt116
- Call center outsourcers based in the Netherlands110
- Call center outsourcers based in Spain109
- Call center outsourcers based in South Africa108
- Call center outsourcers based in Colombia90
- Call center outsourcers based in Australia84
- Call center outsourcers based in Türkiye75
- Call center outsourcers based in Poland62
- Call center outsourcers based in Argentina59
- Call center outsourcers based in Tunisia52
- Call center outsourcers based in the Dominican Republic48
- Call center outsourcers based in Romania41
- Call center outsourcers based in Belgium36
- Call center outsourcers based in Chile34
- Call center outsourcers based in Israel30
- Call center outsourcers based in Greece29
- Call center outsourcers based in Ireland25
Cities
- Call center outsourcers based in Lahore, Pakistan199
- Call center outsourcers based in Noida, India74
- Call center outsourcers based in Bangalore, India60
- Call center outsourcers based in New York, United States49
- Call center outsourcers based in Miami, United States33
- Call center outsourcers based in Houston, United States32
- Call center outsourcers based in Austin, United States26
Questions about this company list
What does Exact match mean for call center outsourcers?
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 outsourcers did RevenueBase find worldwide?
The saved snapshot records 8,731 matching company records, 437,724 tracked contacts and 36,037 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.
Related lists
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 call center outsourcers worldwide. Snapshot: September 27, 2026. https://revenuebase.ai/companies/browse/call-center-outsourcers.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗