Company lists · Data refreshed September 2026

Top 25 Outbound calling companies worldwide

Name: Outbound calling companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 5,770 companies tracked

RevenueBase identified 5,770 outbound calling companies worldwide as of September 2026 and tracks 91,106 professional contacts across them, including 9,093 with verified work emails and 8,492 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers outbound calling 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 5, 2026. Country and city lists for outbound calling 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 5, 2026 86% judged on-target in blind review

5,770Companies

91,106Contacts tracked

9,093Verified emails

8,492Mobile numbers

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The 25 largest outbound calling companies worldwide

Ranked by team size

Top 25 of 5,770 outbound calling companies worldwide, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to outbound calling 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	Indirect evidence	Berwyn, PA, United StatesHQ checked Sep 5, 2026	5,001-10,000	2,774 contacts →
	Indirect 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 5, 2026
2	The Office Gurus	Indirect evidence	St Petersburg, FL, RussiaHQ checked Sep 5, 2026	1,001-5,000	1,198 contacts →
	Indirect 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 5, 2026
3	Inktel Contact Center Solutions	Indirect evidence	Doral, FL, United StatesHQ checked Sep 5, 2026	1,001-5,000	902 contacts →
	Indirect 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 5, 2026
4	Answernet	Indirect evidence	Horsham, PA, United StatesHQ checked Sep 5, 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 5, 2026
5	Salelytics	Indirect evidence	Appleton, WI, United StatesHQ checked Sep 5, 2026	1,001-5,000	776 contacts →
	Indirect evidence “Salelytics is now MarketSource.” Source: RevenueBase Database · checked Sep 5, 2026
6	Abstrakt Marketing Group	Indirect evidence	St Louis, MO, United StatesHQ checked Sep 5, 2026	501-1,000	724 contacts →
	Indirect evidence “We book the qualified meetings that fill your pipeline for any B2B company ready to grow.” Source: RevenueBase Database · checked Sep 5, 2026
7	Talksure	Indirect evidence	Durban, South AfricaHQ checked Sep 5, 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 5, 2026
8	Salebuild	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 5, 2026	n/a	708 contacts →
	Indirect 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 5, 2026
9	Flexisales INC	Indirect evidence	Las Vegas, NV, United StatesHQ checked Sep 5, 2026	201-500	697 contacts →
	Indirect evidence “Flexisales, is a global frontrunner in B2B Lead & Demand Generation and Data Services, serving technology companies & agencies worldwide.” Source: RevenueBase Database · checked Sep 5, 2026
10	Girnar Care	Indirect evidence	Jaipur, IndiaHQ checked Sep 5, 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 5, 2026
11	Telenet Marketing Solutions	Indirect evidence	Athens, GA, IndiaHQ checked Sep 5, 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 5, 2026
12	Movingdneedle Pvt. LTD	Indirect evidence	Sterling Heights, MI, United StatesHQ checked Sep 5, 2026	51-200	528 contacts →
	Indirect 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 5, 2026
13	Azpired	Indirect evidence	Cebu City, PhilippinesHQ checked Sep 5, 2026	1,001-5,000	504 contacts →
	Indirect evidence “AZPIRED is a world-class provider of call center outsourcing services, proudly operating multiple locations across the Philippines.” Source: RevenueBase Database · checked Sep 5, 2026
14	Callbox INC	Indirect evidence	Encino, CA, United StatesHQ checked Sep 5, 2026	201-500	499 contacts →
	Indirect 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 5, 2026
15	Demandshore	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	501-1,000	478 contacts →
	Indirect evidence “About DemandShore Since 2004, we’ve been working hard to deliver value to Sales & Marketing professionals across B2B Technology companies globally.” Source: RevenueBase Database · checked Sep 5, 2026
16	Saleshive	Indirect evidence	Denver, CO, United StatesHQ checked Sep 5, 2026	51-200	455 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 5, 2026
17	CCIG	Indirect evidence	Wrocław, PolandHQ checked Sep 5, 2026	1,001-5,000	434 contacts →
	Indirect evidence “CCIG Group has been offering outsourced contact center services since 2002 and professionally supporting its business partners in the B2C and B2B sectors.” Source: RevenueBase Database · checked Sep 5, 2026
18	Ansafone Contact Centers	Indirect evidence	Santa Ana, CA, United StatesHQ checked Sep 5, 2026	501-1,000	431 contacts →
	Indirect evidence “About : Ansafone is the leading outsourced contact center solution provider for companies in the US and Canada and maintains international alliances for global reach.” Source: RevenueBase Database · checked Sep 5, 2026
19	Alliance Pdms	Indirect evidence	Hurst, TX, United StatesHQ checked Sep 5, 2026	51-200	428 contacts →
	Indirect evidence “Alliance is a domestically operated, internationally recognized professional contact center specializing in lead generation and appointment setting.” Source: RevenueBase Database · checked Sep 5, 2026
20	Magellan BPO	Indirect evidence	Mandaluyong City, PhilippinesHQ checked Sep 5, 2026	501-1,000	411 contacts →
	Indirect evidence “Magellan Solutions Outsourcing Inc.” Source: RevenueBase Database · checked Sep 5, 2026
21	Mervice Infotech Pvt. LTD	Partial evidence	Kolkata, IndiaHQ checked Sep 5, 2026	1,001-5,000	395 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 5, 2026
22	Touchstone Communications	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 5, 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 5, 2026
23	Amarketforce	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 5, 2026	201-500	391 contacts →
	Indirect evidence “aMarketForce is a full-scale B2B Contact Database & Demand Generation services company.” Source: RevenueBase Database · checked Sep 5, 2026
24	The Lead Market	Indirect evidence	Nagpur, IndiaHQ checked Sep 5, 2026	51-200	387 contacts →
	Indirect evidence “TLM empowers businesses to generate revenue through their qualified leads.” Source: RevenueBase Database · checked Sep 5, 2026
25	Beyond Codes INC	Indirect evidence	Simi Valley, CA, United StatesHQ checked Sep 5, 2026	201-500	380 contacts →
	Indirect 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 5, 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: outbound calling 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 outbound calling companies.
Partial evidence: Its own public description names part of outbound calling companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outbound calling 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 5,770 outbound calling companies worldwide

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Outbound calling companies worldwide at a glance

As of Sep 5, 2026

10.0%Verified-email coverage

9.3%Mobile-number coverage

15.8Average contacts per company

11-50Median size (employees)

3.7%Largest-city concentration · London

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

2,515

11-50

1,931

51-200

904

201-500

276

501-1,000

1,001-5,000

5,001-10,000

10001+

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 outbound calling 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: 26 countries, largest first: the United States, the United Kingdom, India, France, Germany, Canada, the Netherlands, Australia, the Philippines, Brazil and 16 more. Country and city lists for outbound calling companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “outbound calling 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 outbound calling 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 outbound calling 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, 9,093 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 between September 5, 2026 and September 14, 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.

Outbound calling companies by location

35 lists · largest first

Every Outbound calling 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 outbound calling 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 outbound calling companies are there worldwide?

RevenueBase identified 5,770 outbound calling 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 outbound calling companies?

The United States leads with 2,184 companies, followed by the United Kingdom (750) and India (517). Every outbound calling companies list by country and city is linked on this page.

Which city has the most outbound calling companies?

London leads with 213 headquartered companies, followed by Pune (112) and New York (99).

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 9,093 verified decision-maker contacts tracked across these 5,770 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled from the company graph between September 5, 2026 and September 14, 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.