Company lists · Data refreshed September 2026

Top 25 Lead generation call center companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 12,310 companies tracked

RevenueBase identified 12,310 lead generation call center companies worldwide as of September 2026 and tracks 123,214 professional contacts across them, including 12,091 with verified work emails. The United States is the largest market and Pune the largest hub.

This list covers lead generation call center companies 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 28, 2026. Country and city lists for lead generation call center companies 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

12,310Companies

123,214Contacts tracked

12,091Verified emails

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The 25 largest lead generation call center companies worldwide

Ranked by team size

Top 25 of 12,310 lead generation call center companies worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to lead generation call center companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Advanced Call Center Technologies, LLC	Strong evidence	Berwyn, PA, United StatesHQ checked Sep 28, 2026	5,001-10,000	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 28, 2026
2	Infocision Management Corporation	Partial evidence	Akron, OH, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,764 contacts →
	Partial evidence “InfoCision is an award-winning contact center partner trusted by leading brands for over 40 years.” Source: RevenueBase Database · checked Sep 28, 2026
3	The Office Gurus	Strong evidence	St Petersburg, FL, RussiaHQ checked Sep 28, 2026	1,001-5,000	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 28, 2026
4	Cience	Strong evidence	Miami, FL, United StatesHQ checked Sep 28, 2026	201-500	1,068 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
5	Inktel Contact Center Solutions	Strong evidence	Doral, FL, United StatesHQ checked Sep 28, 2026	1,001-5,000	902 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
6	Answernet	Indirect evidence	Horsham, PA, United StatesHQ checked Sep 28, 2026	501-1,000	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 28, 2026
7	S2w Media	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	806 contacts →
	Indirect evidence “We are innovators, problem solvers, thought leaders, and above all else, a team.” Source: RevenueBase Database · checked Sep 28, 2026
8	Manlitics B2B Ites	Indirect evidence	New York, United StatesHQ checked Sep 28, 2026	501-1,000	750 contacts →
	Indirect evidence “In an ERA of new and emerging digital mediums, we align our core expertise of today’s ever-changing technology with a clear understanding of traditional marketing methods without…” Source: RevenueBase Database · checked Sep 28, 2026
9	Talksure	Indirect evidence	Durban, South AfricaHQ checked Sep 28, 2026	501-1,000	718 contacts →
	Indirect evidence “Established in 2010, Talksure has developed a reputation for being a respected financial services provider and outsource business services partner.” Source: RevenueBase Database · checked Sep 28, 2026
10	Salebuild	Partial evidence	Redwood City, CA, United StatesHQ checked Sep 28, 2026	n/a	708 contacts →
	Partial evidence “Salesify, a leading provider of B2B demand generation services, helps our clients create pipeline and accelerate revenue by identifying, profiling, nurturing and connecting with…” Source: RevenueBase Database · checked Sep 28, 2026
11	Vector	Partial evidence	Fortaleza, BrazilHQ checked Sep 28, 2026	1,001-5,000	701 contacts →
	Partial evidence “A VECTOR SERVIÇOS é uma empresa especializada na criação, implantação e gestão de serviços de Contact Center.” Source: RevenueBase Database · checked Sep 28, 2026
12	Flexisales INC	Strong evidence	Las Vegas, NV, United StatesHQ checked Sep 28, 2026	201-500	697 contacts →
	Strong evidence “Flexisales, is a global frontrunner in B2B Lead & Demand Generation and Data Services, serving technology companies & agencies worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
13	Girnar Care	Partial evidence	Jaipur, IndiaHQ checked Sep 28, 2026	501-1,000	649 contacts →
	Partial evidence “We at Girnar Care work towards customer satisfaction and it is also a center of customer excellence.” Source: RevenueBase Database · checked Sep 28, 2026
14	Fastco	Partial evidence	Providencia, ChileHQ checked Sep 28, 2026	1,001-5,000	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 28, 2026
15	Digitalzone	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	558 contacts →
	Partial evidence “Digitalzone is a global marketing and demand gen company dedicated to delivering compliant leads, exceptional customer satisfaction, and an end-to-end approach.” Source: RevenueBase Database · checked Sep 28, 2026
16	Telenet Marketing Solutions	Indirect evidence	Athens, GA, IndiaHQ checked Sep 28, 2026	201-500	553 contacts →
	Indirect evidence “From initial market awareness to the final stages of a complex B2B buying journey, modern buyers crave authentic interaction.” Source: RevenueBase Database · checked Sep 28, 2026
17	Movingdneedle Pvt. LTD	Strong evidence	Sterling Heights, MI, United StatesHQ checked Sep 28, 2026	51-200	528 contacts →
	Strong evidence “movingDneedle is a Business to Business Sales Lead Generation Company that provides fast and scalable, sales qualified leads through its unique Personalized Email Marketing…” Source: RevenueBase Database · checked Sep 28, 2026
18	Callbox INC	Strong evidence	Encino, CA, United StatesHQ checked Sep 28, 2026	201-500	499 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
19	Saleshive	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	51-200	455 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
20	Proper Business Solutions	Strong evidence	Cairo, EgyptHQ checked Sep 28, 2026	1,001-5,000	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 28, 2026
21	UTS Marketing Solutions	Partial evidence	Bandar Kuala Lumpur, MalaysiaHQ checked Sep 28, 2026	1,001-5,000	442 contacts →
	Partial evidence “UTS is one of Malaysia’s leading outsourced contact centre service providers – managing and operating outbound services for several financial institutions.” Source: RevenueBase Database · checked Sep 28, 2026
22	Qualifa	Strong evidence	Brighton, United KingdomHQ checked Sep 28, 2026	51-200	440 contacts →
	Strong evidence “We are an award winning multilingual lead generation and market research service provider for B2B publishing, marketing, events and tech companies.” Source: RevenueBase Database · checked Sep 28, 2026
23	Alliance Pdms	Strong evidence	Hurst, TX, United StatesHQ checked Sep 28, 2026	51-200	428 contacts →
	Strong evidence “Alliance is a domestically operated, internationally recognized professional contact center specializing in lead generation and appointment setting.” Source: RevenueBase Database · checked Sep 28, 2026
24	MVF	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	401 contacts →
	Indirect evidence “MVF powers growth for our clients by connecting them to potential customers.” Source: RevenueBase Database · checked Sep 28, 2026
25	Touchstone Communications	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 28, 2026	501-1,000	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 28, 2026

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: lead generation call center companies. 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 lead generation call center companies.
Partial evidence: Its own public description names part of lead generation call center companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name lead generation call center companies. 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 12,310 lead generation call center companies worldwide

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Lead generation call center companies worldwide at a glance

As of Sep 28, 2026

9.8%Verified-email coverage

10.0Average contacts per company

1-10Median size (employees)

2.2%Largest-city concentration · Pune

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

6,327

11-50

3,926

51-200

1,481

201-500

390

501-1,000

100

1,001-5,000

5,001-10,000

10001+

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 lead generation call center companies, 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 lead generation call center companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “lead generation call center companies”. 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 lead generation call center companies), 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 lead generation call center companies, 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, 12,091 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 28, 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.

Lead generation call center companies by location

56 lists · largest first

Every Lead generation call center companies 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 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 lead generation call center companies, 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 lead generation call center companies are there worldwide?

RevenueBase identified 12,310 lead generation call center companies 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?

Advanced Call Center Technologies, LLC, headquartered in Berwyn, tops this list with the largest team on record.

Which country has the most lead generation call center companies?

The United States leads with 2,917 companies, followed by India (1,021) and the United Kingdom (892). Every lead generation call center companies list by country and city is linked on this page.

Which city has the most lead generation call center companies?

Pune leads with 266 headquartered companies, followed by London (263) and New York (128).

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 12,091 verified decision-maker contacts tracked across these 12,310 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 28, 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.