Company lists · Data refreshed September 2026

Top 25 Telemarketing and lead generation firms worldwide

Name: Telemarketing and lead generation firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 11,964 companies tracked

RevenueBase identified 11,964 telemarketing and lead generation firms worldwide as of September 2026 and tracks 102,833 professional contacts across them, including 10,563 with verified work emails. The United States is the largest market and Pune the largest hub.

This list covers telemarketing and lead generation firms 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 telemarketing and lead generation firms 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 29, 2026 86% judged on-target in blind review

11,964Companies

102,833Contacts tracked

10,563Verified emails

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The 25 largest telemarketing and lead generation firms worldwide

Ranked by team size

Top 25 of 11,964 telemarketing and lead generation firms worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to telemarketing and lead generation firms: 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	Zanc Assessoria Nacional DE Cobrança	Indirect evidence	São Paulo / Porto Alegre / Taquari, BrazilHQ checked Sep 29, 2026	1,001-5,000	1,249 contacts →
	Indirect evidence “A Zanc é uma Empresa de Teleatendimento que está no mercado desde 1972.+ informações acesse:” Source: RevenueBase Database · checked Sep 29, 2026
2	Cience	Strong evidence	Miami, FL, United StatesHQ checked Sep 29, 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 29, 2026
3	S2w Media	Indirect evidence	New York, NY, United StatesHQ checked Sep 29, 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 29, 2026
4	Manlitics B2B Ites	Indirect evidence	New York, United StatesHQ checked Sep 29, 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 29, 2026
5	Salebuild	Partial evidence	Redwood City, CA, United StatesHQ checked Sep 29, 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 29, 2026
6	Flexisales INC	Strong evidence	Las Vegas, NV, United StatesHQ checked Sep 29, 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 29, 2026
7	Girnar Care	Indirect evidence	Jaipur, IndiaHQ checked Sep 29, 2026	501-1,000	649 contacts →
	Indirect evidence “We at Girnar Care work towards customer satisfaction and it is also a center of customer excellence.” Source: RevenueBase Database · checked Sep 29, 2026
8	Digitalzone	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 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 29, 2026
9	Telenet Marketing Solutions	Indirect evidence	Athens, GA, IndiaHQ checked Sep 29, 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 29, 2026
10	Movingdneedle Pvt. LTD	Strong evidence	Sterling Heights, MI, United StatesHQ checked Sep 29, 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 29, 2026
11	Callbox INC	Strong evidence	Encino, CA, United StatesHQ checked Sep 29, 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 29, 2026
12	Saleshive	Indirect evidence	Denver, CO, United StatesHQ checked Sep 29, 2026	51-200	455 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
13	Qualifa	Strong evidence	Brighton, United KingdomHQ checked Sep 29, 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 29, 2026
14	Alliance Pdms	Strong evidence	Hurst, TX, United StatesHQ checked Sep 29, 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 29, 2026
15	Touchstone Communications	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 29, 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 29, 2026
16	Amarketforce	Partial evidence	San Jose, CA, United StatesHQ checked Sep 29, 2026	201-500	391 contacts →
	Partial evidence “aMarketForce is a full-scale B2B Contact Database & Demand Generation services company.” Source: RevenueBase Database · checked Sep 29, 2026
17	The Lead Market	Partial evidence	Nagpur, IndiaHQ checked Sep 29, 2026	51-200	387 contacts →
	Partial evidence “TLM empowers businesses to generate revenue through their qualified leads.” Source: RevenueBase Database · checked Sep 29, 2026
18	Beyond Codes INC	Strong evidence	Simi Valley, CA, United StatesHQ checked Sep 29, 2026	201-500	380 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 29, 2026
19	Inventive SMI	Indirect evidence	IndiaHQ checked Sep 29, 2026	201-500	339 contacts →
	Indirect evidence “Inventive SMi was founded in 2008 with the goal of providing enterprise-grade communications solutions to businesses of all sizes.” Source: RevenueBase Database · checked Sep 29, 2026
20	Distinct Digital Media	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 29, 2026	501-1,000	300 contacts →
	Indirect evidence “Distinct Digital Media assists both small and large organizations in reaching their maximum potential by connecting them with their target audience at the optimum time and place.” Source: RevenueBase Database · checked Sep 29, 2026
21	Unboundb2b	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 29, 2026	201-500	297 contacts →
	Indirect evidence “UnboundB2B is a marketing agency that caters to Enterprise and Technology companies across the globe to improve ROI on their marketing spend and shorten sales cycle with its…” Source: RevenueBase Database · checked Sep 29, 2026
22	Lahaus	Partial evidence	Medellín, ColombiaHQ checked Sep 29, 2026	51-200	292 contacts →
	Partial evidence “Un solo sistema corre tus ads, habla con tus leads y te entrega clientes listos para cerrar.” Source: RevenueBase Database · checked Sep 29, 2026
23	By Appointment Only, Inc. BAO	Indirect evidence	Chelmsford, MA, United StatesHQ checked Sep 29, 2026	201-500	291 contacts →
	Indirect evidence “The market knows us as the leader in appointment setting.” Source: RevenueBase Database · checked Sep 29, 2026
24	Calltend INC	Strong evidence	Los Angeles, TX, United StatesHQ checked Sep 29, 2026	51-200	289 contacts →
	Strong evidence “Current Vertical Focus: Real Estate - Lead Generation, Lead Conversion, Lead Qualification, Agent Recruiting Mortgage - Lead Conversion, Lead Qualification Insurance - Lead…” Source: RevenueBase Database · checked Sep 29, 2026
25	Accepta	Indirect evidence	Madrid, SpainHQ checked Sep 29, 2026	501-1,000	276 contacts →
	Indirect evidence “Accept@ Servicios Integrales es una empresa especializada en la venta telefónica que pertenece al Grupo Santalucia.” Source: RevenueBase Database · checked Sep 29, 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: telemarketing and lead generation firms. 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 telemarketing and lead generation firms.
Partial evidence: Its own public description names part of telemarketing and lead generation firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telemarketing and lead generation firms. 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 11,964 telemarketing and lead generation firms worldwide

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Telemarketing and lead generation firms worldwide at a glance

As of Sep 29, 2026

10.3%Verified-email coverage

8.6Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · Pune

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

6,406

11-50

3,848

51-200

1,276

201-500

308

501-1,000

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 telemarketing and lead generation firms, 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 telemarketing and lead generation firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “telemarketing and lead generation firms”. 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 telemarketing and lead generation firms), 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 telemarketing and lead generation firms, 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, 10,563 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.

Telemarketing and lead generation firms by location

52 lists · largest first

Every Telemarketing and lead generation firms 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 telemarketing and lead generation firms, 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 telemarketing and lead generation firms are there worldwide?

RevenueBase identified 11,964 telemarketing and lead generation firms 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?

Zanc Assessoria Nacional DE Cobrança, headquartered in Taquari, tops this list with the largest team on record.

Which country has the most telemarketing and lead generation firms?

The United States leads with 3,012 companies, followed by India (1,117) and the United Kingdom (908). Every telemarketing and lead generation firms list by country and city is linked on this page.

Which city has the most telemarketing and lead generation firms?

Pune leads with 315 headquartered companies, followed by London (262) and New York (131).

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 10,563 verified decision-maker contacts tracked across these 11,964 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.