Company lists · Data refreshed October 2026

Top 25 Lead generation call centers worldwide

Name: Lead generation call centers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 10,561 companies tracked

RevenueBase identified 10,561 company matches for lead generation call centers worldwide as of October 2026 and tracks 112,389 professional contacts across them, including 9,680 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for lead generation call centers 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 October 1, 2026. Country and city lists for lead generation call centers follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 1, 2026 How this list was built

10,561Companies

112,389Contacts tracked

9,680Verified emails

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The 25 largest lead generation call centers worldwide

Ranked by team size

Top 25 of 10,561 company matches for lead generation call centers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Advanced Call Center Technologies, LLC	Exact match	Berwyn, PA, United StatesHQ recorded Oct 1, 2026	5,001-10,000	2,774 contacts →
	Exact match “Advanced Call Center Technologies, LLC (ACT) is a premier provider of domestic (USA), near shore and far shore outsourced call center services to the financial services, mortgage…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2	The Office Gurus	Exact match	St Petersburg, FL, RussiaHQ recorded Oct 1, 2026	1,001-5,000	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 · Oct 1, 2026 · View company records in RevenueBase
3	Cience	Exact match	Miami, FL, United StatesHQ recorded Oct 1, 2026	201-500	1,068 contacts →
	Exact match “CIENCE Technologies, Inc, founded in 2015 and headquartered in Denver, CO, is a pioneering global company in lead generation software and services, committed to transforming the…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4	Inktel Contact Center Solutions	Exact match	Doral, FL, United StatesHQ recorded Oct 1, 2026	1,001-5,000	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 · Oct 1, 2026 · View company records in RevenueBase
5	Answernet	Exact match	Horsham, PA, United StatesHQ recorded Oct 1, 2026	501-1,000	883 contacts →
	Exact match “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!” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6	S2w Media	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	501-1,000	806 contacts →
	Exact match “We are innovators, problem solvers, thought leaders, and above all else, a team.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7	Talksure	Exact match	Durban, South AfricaHQ recorded Oct 1, 2026	501-1,000	718 contacts →
	Exact match “Established in 2010, Talksure has developed a reputation for being a respected financial services provider and outsource business services partner.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8	Salebuild	Exact match	Redwood City, CA, United StatesHQ recorded Oct 1, 2026	n/a	708 contacts →
	Exact match “Salesify, a leading provider of B2B demand generation services, helps our clients create pipeline and accelerate revenue by identifying, profiling, nurturing and connecting with…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9	Flexisales INC	Exact match	Las Vegas, NV, United StatesHQ recorded Oct 1, 2026	201-500	697 contacts →
	Exact match “Flexisales, is a global frontrunner in B2B Lead & Demand Generation and Data Services, serving technology companies & agencies worldwide.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10	Girnar Care	Exact match	Jaipur, IndiaHQ recorded Oct 1, 2026	501-1,000	649 contacts →
	Exact match “We at Girnar Care work towards customer satisfaction and it is also a center of customer excellence.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11	Digitalzone	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	501-1,000	558 contacts →
	Exact match “Digitalzone is a global marketing and demand gen company dedicated to delivering compliant leads, exceptional customer satisfaction, and an end-to-end approach.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12	Telenet Marketing Solutions	Exact match	Athens, GA, IndiaHQ recorded Oct 1, 2026	201-500	553 contacts →
	Exact match “From initial market awareness to the final stages of a complex B2B buying journey, modern buyers crave authentic interaction.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13	Movingdneedle Pvt. LTD	Exact match	Sterling Heights, MI, United StatesHQ recorded Oct 1, 2026	51-200	528 contacts →
	Exact match “movingDneedle is a Business to Business Sales Lead Generation Company that provides fast and scalable, sales qualified leads through its unique Personalized Email Marketing…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14	Callbox INC	Exact match	Encino, CA, United StatesHQ recorded Oct 1, 2026	201-500	499 contacts →
	Exact match “Callbox is the #1 trusted lead generation services and AI-Powered Growth Strategy Partner by enterprise and scaling businesses in the USA, Canada, Asia Pacific, Latin America…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15	Saleshive	Exact match	Denver, CO, United StatesHQ recorded Oct 1, 2026	51-200	455 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16	Proper Business Solutions	Exact match	Cairo, EgyptHQ recorded Oct 1, 2026	1,001-5,000	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 · Oct 1, 2026 · View company records in RevenueBase
17	Qualifa	Exact match	Brighton, United KingdomHQ recorded Oct 1, 2026	51-200	440 contacts →
	Exact match “We are an award winning multilingual lead generation and market research service provider for B2B publishing, marketing, events and tech companies.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18	Alliance Pdms	Exact match	Hurst, TX, United StatesHQ recorded Oct 1, 2026	51-200	428 contacts →
	Exact match “Alliance is a domestically operated, internationally recognized professional contact center specializing in lead generation and appointment setting.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19	Magellan BPO	Exact match	Mandaluyong City, PhilippinesHQ recorded Oct 1, 2026	501-1,000	411 contacts →
	Exact match “Magellan Solutions Outsourcing Inc.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20	Mervice Infotech Pvt. LTD	Exact match	Kolkata, IndiaHQ recorded Oct 1, 2026	1,001-5,000	395 contacts →
	Exact match “As a company with the potential to establish a strong foothold within the BPO domain Mervice promises to go beyond ensuring quality inbound and outbound services.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21	Touchstone Communications	Exact match	Fort Worth, TX, United StatesHQ recorded Oct 1, 2026	501-1,000	393 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22	The Lead Market	Exact match	Nagpur, IndiaHQ recorded Oct 1, 2026	51-200	387 contacts →
	Exact match “TLM empowers businesses to generate revenue through their qualified leads.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23	Beyond Codes INC	Exact match	Simi Valley, CA, United StatesHQ recorded Oct 1, 2026	201-500	380 contacts →
	Exact match “Beyond Codes is a global B2B lead generation and appointment-setting agency trusted by some of the world's leading technology companies to build enterprise sales pipeline.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24	The Connection Contact Center	Exact match	Bloomington, MN, United StatesHQ recorded Oct 1, 2026	1,001-5,000	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 · Oct 1, 2026 · View company records in RevenueBase
25	Onbrand24	Exact match	Iowa City, United StatesHQ recorded Oct 1, 2026	1,001-5,000	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 · Oct 1, 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 “lead generation call centers”. 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 10,561 lead generation call centers worldwide

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Lead generation call centers worldwide at a glance

As of Oct 1, 2026

8.6%Verified-email coverage

10.6Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · London

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

4,997

11-50

3,484

51-200

1,481

201-500

407

501-1,000

110

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for lead generation call centers are linked below.
What qualifies: Company records worldwide whose business descriptions match “lead generation call centers” 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 9,680 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 October 1, 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.

Lead generation call centers by location

50 lists · largest first

Every Lead generation call centers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “lead generation call centers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many lead generation call centers are there worldwide?

RevenueBase identified 10,561 company matches for lead generation call centers worldwide as of October 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?

Advanced Call Center Technologies, LLC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most lead generation call centers?

The United States leads with 2,551 companies, followed by India (909) and the United Kingdom (814). Every lead generation call centers list by country and city is linked on this page.

Which city has the most lead generation call centers?

London leads with 210 company records, followed by Pune (208) and Rawalpindi (122).

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 9,680 professional contacts with verified work emails tracked across these 10,561 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 October 1, 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.