Company lists · Data refreshed September 2026
Top 25 Seasonal call center services worldwide
RevenueBase identified 1,563 seasonal call center services worldwide as of September 2026 and tracks 60,121 professional contacts across them, including 3,369 with verified work emails. The United States is the largest market and Lahore the largest hub.
This list covers seasonal call center services worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026. Country and city lists for seasonal call center services follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest seasonal call center services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,914 contacts → | ||||
Partial evidence “Vikstar is one of the biggest contact centers of Brazil.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 3,122 contacts → | ||||
Indirect evidence “Email: info@Telvista.com Telvista is a premier provider of contact solutions that drive customer loyalty and create competitive advantage for our clients.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 2,774 contacts → | ||||
Strong evidence “Advanced Call Center Technologies, LLC (ACT) is a premier provider of domestic (USA), near shore and far shore outsourced call center services to the financial services, mortgage…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,741 contacts → | ||||
Indirect evidence “Award-winning outsourcing partner with two decades of experience operating an exclusively nearshore strategy that delivers better performance, close to home, and at a lower cost.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,710 contacts → | ||||
Partial evidence “Support Services Group (SSG) helps businesses accelerate growth and earn customers for life through high-touch, outsourced engagement center services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,473 contacts → | ||||
Partial evidence “Senture provides comprehensive contact center service support nationally.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,198 contacts → | ||||
Strong evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 883 contacts → | ||||
Indirect evidence “If you are interested in growing your business or increasing efficiency, AnswerNet has the expertise, technology, and people to help you take your company to new heights!” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 758 contacts → | ||||
Indirect evidence “Sequential Tech is the trusted outsource partner of wireline/wireless telecommunication, broadband, cable/MSO, and satellite service providers.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 623 contacts → | ||||
Partial evidence “Impulsamos el éxito de nuestros clientes a través de soluciones personalizadas en Contact Center y experiencia al cliente.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 572 contacts → | ||||
Partial evidence “Empresa dedicada a prestar servicios de Contact Center a terceros.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 562 contacts → | ||||
Indirect evidence “teleNetwork is a leading provider of outsourced customer service, technical support, and sales enablement solutions for technology products and services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 542 contacts → | ||||
Indirect evidence “We are customer service experts.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 515 contacts → | ||||
Indirect evidence “ContactUs Communications is a U.S.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 467 contacts → | ||||
Indirect evidence “DigiTech is one of the fastest growing Outsourcing & Offsourcing company in Delhi/NCR.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 459 contacts → | ||||
Indirect evidence “In 2006, Advensus embarked on its journey in the Dominican Republic, initially known as Nearshore, with a modest 100 telemarketing positions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 454 contacts → | ||||
Indirect evidence “SupportZebra is a business process outsourcing company based in the Philippines, with headquarters in the Houston,TX region, that specializes in: Sales & Marketing Retention |…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 447 contacts → | ||||
Strong evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 425 contacts → | ||||
Indirect evidence “Nuestros servicios contribuyen al desarrollo de negocios más rentables, ya que poseemos la experiencia y tecnología que nos permite trabajar en el descubrimiento de nuevas…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 393 contacts → | ||||
Indirect evidence “Touchstone Communications was built in 2002 on the philosophy of hiring educated, motivated talent and then providing them with the best training and management to achieve our…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 390 contacts → | ||||
Partial evidence “Com base na necessidade em oferecer serviços especializados e de qualidade através de contactos telefónicos, surgiu a Solução Contact Center, a mais moderna plataforma de contact…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 354 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 346 contacts → | ||||
Strong evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 338 contacts → | ||||
Partial evidence “29 años de experiencia brindando soluciones integrales de contact center que superen las expectativas de nuestros clientes, a través de un equipo altamente capacitado, tecnología…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 338 contacts → | ||||
Strong evidence “With more than 900 employees, PhoneAct is an ISO 9001/2008 certified offshore call center service provider.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: seasonal call center services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names seasonal call center services.
- Partial evidence
- Its own public description names part of seasonal call center services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name seasonal call center services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 1,563 seasonal call center services worldwide
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Seasonal call center services worldwide at a glance
As of Sep 29, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among seasonal call center services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for seasonal call center services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “seasonal call center services”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names seasonal call center services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among seasonal call center services, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 3,369 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 29, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Seasonal call center services by location
7 lists · largest firstEvery Seasonal call center services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Seasonal call center services based in the United States276
- Seasonal call center services based in India114
- Seasonal call center services based in the Philippines53
- Seasonal call center services based in Germany44
- Seasonal call center services based in the United Kingdom40
- Seasonal call center services based in Canada33
- Seasonal call center services based in France27
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names seasonal call center services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many seasonal call center services are there worldwide?
RevenueBase identified 1,563 seasonal call center services worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Vikstar Contact Center, headquartered in Sao Paulo, tops this list with the largest team on record.
Which country has the most seasonal call center services?
The United States leads with 276 companies, followed by India (114) and the Philippines (53). Every seasonal call center services list by country and city is linked on this page.
Which city has the most seasonal call center services?
Lahore leads with 38 headquartered companies, followed by Rawalpindi (28) and London (16).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 3,369 verified decision-maker contacts tracked across these 1,563 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.