Company lists · Data refreshed September 2026
Top 25 Customer retention outsourcing firms worldwide
RevenueBase identified 1,308 company matches for customer retention outsourcing firms worldwide as of September 2026 and tracks 54,175 professional contacts across them, including 4,266 with verified work emails. The United States is the largest market and Lahore the largest hub.
This list covers company matches for customer retention outsourcing 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 28, 2026. Country and city lists for customer retention outsourcing 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 customer retention outsourcing firms worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 28, 2026 · View company records in RevenueBase | |||||
| 2 | 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 28, 2026 · View company records in RevenueBase | |||||
| 3 | 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 28, 2026 · View company records in RevenueBase | |||||
| 4 | 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 28, 2026 · View company records in RevenueBase | |||||
| 5 | 1,404 contacts → | ||||
Exact match “NCO's Customer Fit Solutions are Custom Fit.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 6 | 1,198 contacts → | ||||
Exact match “The Office Gurus (TOG) is a global call center and business process outsource provider of customer care, telemarketing, lead generation, appointment setting, order entry, accounts…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 7 | 1,023 contacts → | ||||
Exact match “En iké todos los días brindamos soluciones de personas hacia personas alrededor del mundo, aumentando la oferta de empresas que preocupadas por brindar respaldo, seguridad y…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 8 | 917 contacts → | ||||
Exact match “Our People.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 9 | 911 contacts → | ||||
Exact match “Somos a união da Liderança, e seus 34 anos de atendimento humanizado, com a Emdia, e sua expertise em inovação.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 10 | 902 contacts → | ||||
Exact match “Our Company Inktel is a leading business process outsourcer that specializes in creating personalized call center solutions which enable our clients to increase market share…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 11 | 873 contacts → | ||||
Exact match “At Convergys Intelligent Contact, we build sustainable revenue streams for our clients.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 12 | 682 contacts → | ||||
Exact match “WEngage creates the best and authentic customer experiences driven by skilled employees, cutting-edge technology and certified working procedures.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 13 | 569 contacts → | ||||
Exact match “Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 14 | 542 contacts → | ||||
Exact match “We are customer service experts.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 15 | 517 contacts → | ||||
Exact match “iContact BPO is in the business of transforming global enterprises - because we provide the BPO solutions that organizations need to provide exceptional service.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 16 | 515 contacts → | ||||
Exact match “ContactUs Communications is a U.S.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 17 | 509 contacts → | ||||
Exact match “ServiceFirst is a World Class Call Center and BPO with strategic locations around the globe providing an elevated Customer Experience to benefit your business with exceptional…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 18 | 474 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 19 | 455 contacts → | ||||
Exact match “ExpertCallers, a Flatworld Solutions company, is a well-established and reputed modern day call center outsourcing company.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 20 | 447 contacts → | ||||
Exact match “Proper Business solutions is offering a comprehensive suite of customer care call center services, outbound and lead generation, back-office and data processing solutions to…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 21 | 434 contacts → | ||||
Exact match “We are a people-focused business that provides outsourced contact centre solutions and specializes in customer life cycle management.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 22 | 430 contacts → | ||||
Exact match “Millennium1 Solutions is now NTT Business Process Outsourcing.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 23 | 354 contacts → | ||||
Exact match “For over 35 years, The Connection has made a name for ourselves becoming one of the top industry partners to Fortune 500 companies looking to outsource their contact center…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 24 | 346 contacts → | ||||
Exact match “As a distinguished global leader in call center outsourcing, OnBrand24 takes pride in its 30-year legacy of delivering exceptional inbound and outbound call center services across…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 25 | 318 contacts → | ||||
Exact match “We are a diversified services company with extensive experience in design and execution of customer engagement programs meeting diverse requirements of our clients.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “customer retention outsourcing 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 1,308 customer retention outsourcing firms worldwide
See the full list, filter by size, metro and specialty, and access 4,266 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Customer retention outsourcing firms worldwide at a glance
As of Sep 28, 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 customer retention outsourcing firms are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “customer retention outsourcing 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 4,266 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 28, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Customer retention outsourcing firms by location
6 lists · largest firstEvery Customer retention outsourcing firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Customer retention outsourcing firms based in the United States224
- Customer retention outsourcing firms based in India103
- Customer retention outsourcing firms based in the United Kingdom48
- Customer retention outsourcing firms based in Brazil44
- Customer retention outsourcing firms based in Canada30
- Customer retention outsourcing firms based in Germany25
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “customer retention outsourcing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many customer retention outsourcing firms are there worldwide?
RevenueBase identified 1,308 company matches for customer retention outsourcing 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?
Callink tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most customer retention outsourcing firms?
The United States leads with 224 companies, followed by India (103) and the United Kingdom (48). Every customer retention outsourcing firms list by country and city is linked on this page.
Which city has the most customer retention outsourcing firms?
Lahore leads with 30 company records, followed by Manila (13) and Rawalpindi (12).
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 4,266 professional contacts with verified work emails tracked across these 1,308 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 28, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,308 customer retention outsourcing 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 customer retention outsourcing 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 1,308 matching company records for customer retention outsourcing firms worldwide, with 54,175 tracked contacts and 4,266 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 28, 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 customer retention outsourcing 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 |  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 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  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 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  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 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  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 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  NCO Financial Systemsncogroup.comHQ: United StatesReported employees: 10001+ | United States | 10001+ | Exact match | 1,404 contacts → |
“NCO's Customer Fit Solutions are Custom Fit.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  The Office Gurustheofficegurus.comHQ: St Petersburg, FL, RussiaReported employees: 1,001-5,000 | St Petersburg, FL, Russia | 1,001-5,000 | Exact match | 1,198 contacts → |
“The Office Gurus (TOG) is a global call center and business process outsource provider of customer care, telemarketing, lead generation, appointment setting, order entry, accounts…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | IKÉ Asistenciaikeasistencia.com HQ: MexicoReported employees: 1,001-5,000 | Mexico | 1,001-5,000 | Exact match | 1,023 contacts → |
“En iké todos los días brindamos soluciones de personas hacia personas alrededor del mundo, aumentando la oferta de empresas que preocupadas por brindar respaldo, seguridad y…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Rewardscorewardsco.comHQ: Durban, South AfricaReported employees: 1,001-5,000 | Durban, South Africa | 1,001-5,000 | Exact match | 917 contacts → |
“Our People.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  EMDIAeuemdia.com.brHQ: São Paulo, BrazilReported employees: 1,001-5,000 | São Paulo, Brazil | 1,001-5,000 | Exact match | 911 contacts → |
“Somos a união da Liderança, e seus 34 anos de atendimento humanizado, com a Emdia, e sua expertise em inovação.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Inktel Contact Center Solutionsinktel.comHQ: Doral, FL, United StatesReported employees: 1,001-5,000 | Doral, FL, United States | 1,001-5,000 | Exact match | 902 contacts → |
“Our Company Inktel is a leading business process outsourcer that specializes in creating personalized call center solutions which enable our clients to increase market share…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Convergys Intelligent Contactconvergys.comHQ: Altrincham, United KingdomReported employees: 10001+ | Altrincham, United Kingdom | 10001+ | Exact match | 873 contacts → |
“At Convergys Intelligent Contact, we build sustainable revenue streams for our clients.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Wengagewengage.euHQ: Diegem, BelgiumReported employees: 1,001-5,000 | Diegem, Belgium | 1,001-5,000 | Exact match | 682 contacts → |
“WEngage creates the best and authentic customer experiences driven by skilled employees, cutting-edge technology and certified working procedures.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Vertex Data Sciencevertexgroup.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 569 contacts → |
“Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Global Contact Services GCSgcsagents.comHQ: Salisbury, NC, United StatesReported employees: 501-1,000 | Salisbury, NC, United States | 501-1,000 | Exact match | 542 contacts → |
“We are customer service experts.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Icontact BPOicontactbpo.comHQ: Johannesburg, South AfricaReported employees: 1,001-5,000 | Johannesburg, South Africa | 1,001-5,000 | Exact match | 517 contacts → |
“iContact BPO is in the business of transforming global enterprises - because we provide the BPO solutions that organizations need to provide exceptional service.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Contactus Communicationscusc.comHQ: Columbus, OH, United StatesReported employees: 1,001-5,000 | Columbus, OH, United States | 1,001-5,000 | Exact match | 515 contacts → |
“ContactUs Communications is a U.S.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Servicefirstservicefirstcx.comHQ: Alabang, PhilippinesReported employees: 1,001-5,000 | Alabang, Philippines | 1,001-5,000 | Exact match | 509 contacts → |
“ServiceFirst is a World Class Call Center and BPO with strategic locations around the globe providing an elevated Customer Experience to benefit your business with exceptional…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | ECE Consulting Groupececonsultinggroup.com HQ: United StatesReported employees: Not recorded | United States | Not recorded | Exact match | 474 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 19 |  Life At Ecplexpertcallers.comHQ: Bengaluru, IndiaReported employees: 1,001-5,000 | Bengaluru, India | 1,001-5,000 | Exact match | 455 contacts → |
“ExpertCallers, a Flatworld Solutions company, is a well-established and reputed modern day call center outsourcing company.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Proper Business Solutionsproperbusinesssolutions.comHQ: Cairo, EgyptReported employees: 1,001-5,000 | Cairo, Egypt | 1,001-5,000 | Exact match | 447 contacts → |
“Proper Business solutions is offering a comprehensive suite of customer care call center services, outbound and lead generation, back-office and data processing solutions to…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Synergy Contact Centresynergycontactcentre.comHQ: Ethekwini, South AfricaReported employees: 1,001-5,000 | Ethekwini, South Africa | 1,001-5,000 | Exact match | 434 contacts → |
“We are a people-focused business that provides outsourced contact centre solutions and specializes in customer life cycle management.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Millennium 1 Solutionsmillennium1solutions.comHQ: Toronto, ON, CanadaReported employees: 1,001-5,000 | Toronto, ON, Canada | 1,001-5,000 | Exact match | 430 contacts → |
“Millennium1 Solutions is now NTT Business Process Outsourcing.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  The Connection Contact Centertheconnectioncc.comHQ: Bloomington, MN, United StatesReported employees: 1,001-5,000 | Bloomington, MN, United States | 1,001-5,000 | Exact match | 354 contacts → |
“For over 35 years, The Connection has made a name for ourselves becoming one of the top industry partners to Fortune 500 companies looking to outsource their contact center…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Onbrand24onbrand24.comHQ: Iowa City, United StatesReported employees: 1,001-5,000 | Iowa City, United States | 1,001-5,000 | Exact match | 346 contacts → |
“As a distinguished global leader in call center outsourcing, OnBrand24 takes pride in its 30-year legacy of delivering exceptional inbound and outbound call center services across…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  ATS Services PVT LTDservicesats.comHQ: Faridabad, IndiaReported employees: 201-500 | Faridabad, India | 201-500 | Exact match | 318 contacts → |
“We are a diversified services company with extensive experience in design and execution of customer engagement programs meeting diverse requirements of our clients.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,308 company matches
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Customer retention outsourcing firms: dataset insights
September 28, 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
1,306 records in the displayed employee bands.
2 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 1,308 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 28, 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 ↗
Customer retention outsourcing firms by location
6 lists · largest firstEvery Customer retention outsourcing firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Customer retention outsourcing firms based in the United States224
- Customer retention outsourcing firms based in India103
- Customer retention outsourcing firms based in the United Kingdom48
- Customer retention outsourcing firms based in Brazil44
- Customer retention outsourcing firms based in Canada30
- Customer retention outsourcing firms based in Germany25
Questions about this company list
What does Exact match mean for customer retention outsourcing 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 customer retention outsourcing firms did RevenueBase find worldwide?
The saved snapshot records 1,308 matching company records, 54,175 tracked contacts and 4,266 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 28, 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 customer retention outsourcing firms worldwide. Snapshot: September 28, 2026. https://revenuebase.ai/companies/browse/customer-retention-outsourcing-firms.
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 customer retention outsourcing firms worldwide
RevenueBase records 1,308 matching company records for customer retention outsourcing firms worldwide, with 54,175 tracked contacts and 4,266 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 28, 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 customer retention outsourcing 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 | 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 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | 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 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | 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 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | 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 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | NCO Financial Systemsncogroup.com HQ: United StatesReported employees: 10001+ | United States | 10001+ | Exact match | 1,404 contacts → |
“NCO's Customer Fit Solutions are Custom Fit.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | The Office Gurustheofficegurus.com HQ: St Petersburg, FL, RussiaReported employees: 1,001-5,000 | St Petersburg, FL, Russia | 1,001-5,000 | Exact match | 1,198 contacts → |
“The Office Gurus (TOG) is a global call center and business process outsource provider of customer care, telemarketing, lead generation, appointment setting, order entry, accounts…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | IKÉ Asistenciaikeasistencia.com HQ: MexicoReported employees: 1,001-5,000 | Mexico | 1,001-5,000 | Exact match | 1,023 contacts → |
“En iké todos los días brindamos soluciones de personas hacia personas alrededor del mundo, aumentando la oferta de empresas que preocupadas por brindar respaldo, seguridad y…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Rewardscorewardsco.com HQ: Durban, South AfricaReported employees: 1,001-5,000 | Durban, South Africa | 1,001-5,000 | Exact match | 917 contacts → |
“Our People.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | EMDIAeuemdia.com.br HQ: São Paulo, BrazilReported employees: 1,001-5,000 | São Paulo, Brazil | 1,001-5,000 | Exact match | 911 contacts → |
“Somos a união da Liderança, e seus 34 anos de atendimento humanizado, com a Emdia, e sua expertise em inovação.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Inktel Contact Center Solutionsinktel.com HQ: Doral, FL, United StatesReported employees: 1,001-5,000 | Doral, FL, United States | 1,001-5,000 | Exact match | 902 contacts → |
“Our Company Inktel is a leading business process outsourcer that specializes in creating personalized call center solutions which enable our clients to increase market share…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Convergys Intelligent Contactconvergys.com HQ: Altrincham, United KingdomReported employees: 10001+ | Altrincham, United Kingdom | 10001+ | Exact match | 873 contacts → |
“At Convergys Intelligent Contact, we build sustainable revenue streams for our clients.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Wengagewengage.eu HQ: Diegem, BelgiumReported employees: 1,001-5,000 | Diegem, Belgium | 1,001-5,000 | Exact match | 682 contacts → |
“WEngage creates the best and authentic customer experiences driven by skilled employees, cutting-edge technology and certified working procedures.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Vertex Data Sciencevertexgroup.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 569 contacts → |
“Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Global Contact Services GCSgcsagents.com HQ: Salisbury, NC, United StatesReported employees: 501-1,000 | Salisbury, NC, United States | 501-1,000 | Exact match | 542 contacts → |
“We are customer service experts.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Icontact BPOicontactbpo.com HQ: Johannesburg, South AfricaReported employees: 1,001-5,000 | Johannesburg, South Africa | 1,001-5,000 | Exact match | 517 contacts → |
“iContact BPO is in the business of transforming global enterprises - because we provide the BPO solutions that organizations need to provide exceptional service.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Contactus Communicationscusc.com HQ: Columbus, OH, United StatesReported employees: 1,001-5,000 | Columbus, OH, United States | 1,001-5,000 | Exact match | 515 contacts → |
“ContactUs Communications is a U.S.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Servicefirstservicefirstcx.com HQ: Alabang, PhilippinesReported employees: 1,001-5,000 | Alabang, Philippines | 1,001-5,000 | Exact match | 509 contacts → |
“ServiceFirst is a World Class Call Center and BPO with strategic locations around the globe providing an elevated Customer Experience to benefit your business with exceptional…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | ECE Consulting Groupececonsultinggroup.com HQ: United StatesReported employees: Not recorded | United States | Not recorded | Exact match | 474 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 19 | Life At Ecplexpertcallers.com HQ: Bengaluru, IndiaReported employees: 1,001-5,000 | Bengaluru, India | 1,001-5,000 | Exact match | 455 contacts → |
“ExpertCallers, a Flatworld Solutions company, is a well-established and reputed modern day call center outsourcing company.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Proper Business Solutionsproperbusinesssolutions.com HQ: Cairo, EgyptReported employees: 1,001-5,000 | Cairo, Egypt | 1,001-5,000 | Exact match | 447 contacts → |
“Proper Business solutions is offering a comprehensive suite of customer care call center services, outbound and lead generation, back-office and data processing solutions to…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Synergy Contact Centresynergycontactcentre.com HQ: Ethekwini, South AfricaReported employees: 1,001-5,000 | Ethekwini, South Africa | 1,001-5,000 | Exact match | 434 contacts → |
“We are a people-focused business that provides outsourced contact centre solutions and specializes in customer life cycle management.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Millennium 1 Solutionsmillennium1solutions.com HQ: Toronto, ON, CanadaReported employees: 1,001-5,000 | Toronto, ON, Canada | 1,001-5,000 | Exact match | 430 contacts → |
“Millennium1 Solutions is now NTT Business Process Outsourcing.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | The Connection Contact Centertheconnectioncc.com HQ: Bloomington, MN, United StatesReported employees: 1,001-5,000 | Bloomington, MN, United States | 1,001-5,000 | Exact match | 354 contacts → |
“For over 35 years, The Connection has made a name for ourselves becoming one of the top industry partners to Fortune 500 companies looking to outsource their contact center…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Onbrand24onbrand24.com HQ: Iowa City, United StatesReported employees: 1,001-5,000 | Iowa City, United States | 1,001-5,000 | Exact match | 346 contacts → |
“As a distinguished global leader in call center outsourcing, OnBrand24 takes pride in its 30-year legacy of delivering exceptional inbound and outbound call center services across…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | ATS Services PVT LTDservicesats.com HQ: Faridabad, IndiaReported employees: 201-500 | Faridabad, India | 201-500 | Exact match | 318 contacts → |
“We are a diversified services company with extensive experience in design and execution of customer engagement programs meeting diverse requirements of our clients.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Customer retention outsourcing firms: dataset insights
September 28, 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
1,306 records in the displayed employee bands.
2 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 1,308 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 28, 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 ↗
Customer retention outsourcing firms by location
6 lists · largest firstEvery Customer retention outsourcing firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Customer retention outsourcing firms based in the United States224
- Customer retention outsourcing firms based in India103
- Customer retention outsourcing firms based in the United Kingdom48
- Customer retention outsourcing firms based in Brazil44
- Customer retention outsourcing firms based in Canada30
- Customer retention outsourcing firms based in Germany25
Questions about this company list
What does Exact match mean for customer retention outsourcing 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 customer retention outsourcing firms did RevenueBase find worldwide?
The saved snapshot records 1,308 matching company records, 54,175 tracked contacts and 4,266 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 28, 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
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Cite this list
RevenueBase Data Team. Top 25 customer retention outsourcing firms worldwide. Snapshot: September 28, 2026. https://revenuebase.ai/companies/browse/customer-retention-outsourcing-firms.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗