Company lists · Data refreshed September 2026

Top 25 Outbound marketing services worldwide

Name: Outbound marketing services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 26,926 companies tracked

RevenueBase identified 26,926 outbound marketing services worldwide as of September 2026 and tracks 190,590 professional contacts across them, including 25,497 with verified work emails. The United States is the largest market and London the largest hub.

This list covers outbound marketing 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 21, 2026. Country and city lists for outbound marketing 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

26,926Companies

190,590Contacts tracked

25,497Verified emails

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The 25 largest outbound marketing services worldwide

Ranked by team size

Top 25 of 26,926 outbound marketing services worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to outbound marketing services: 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	Xdbs Worldwide	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 21, 2026	1,001-5,000	3,498 contacts →
	Partial evidence “At XDBS, we primarily work with media agencies, publishers and marketing companies looking to leverage marketing automation and digital marketing capacity and capability to…” Source: RevenueBase Database · checked Sep 21, 2026
2	Best Version Media	Partial evidence	Brookfield, WI, United StatesHQ checked Sep 21, 2026	n/a	2,416 contacts →
	Partial evidence “Best Version Media simplifies local marketing by offering small and midsize businesses a complete mix of solutions to keep them top-of-mind, from community magazine ads to digital…” Source: RevenueBase Database · checked Sep 21, 2026
3	Webhelp Enterprise	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	10001+	1,795 contacts →
	Indirect evidence “The Concentrix B2B sales practice is here to design, build and run projects for our clients.” Source: RevenueBase Database · checked Sep 21, 2026
4	Inktel Contact Center Solutions	Indirect evidence	Doral, FL, United StatesHQ checked Sep 21, 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 21, 2026
5	S2w Media	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
6	ZAZ Vendas	Indirect evidence	Campinas, BrazilHQ checked Sep 21, 2026	501-1,000	796 contacts →
	Indirect evidence “Em um mercado cada vez mais competitivo, onde a eficiência em vendas massificadas e externas é um desafio constante, a ZAZ Vendas surge como a resposta definitiva.” Source: RevenueBase Database · checked Sep 21, 2026
7	Manlitics B2B Ites	Partial evidence	New York, United StatesHQ checked Sep 21, 2026	501-1,000	750 contacts →
	Partial 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 21, 2026
8	Anteriad	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	740 contacts →
	Indirect evidence “Data Driven.” Source: RevenueBase Database · checked Sep 21, 2026
9	Abstrakt Marketing Group	Indirect evidence	St Louis, MO, United StatesHQ checked Sep 21, 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 21, 2026
10	Talksure	Indirect evidence	Durban, South AfricaHQ checked Sep 21, 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 21, 2026
11	Salebuild	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 21, 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 21, 2026
12	Flexisales INC	Indirect evidence	Las Vegas, NV, United StatesHQ checked Sep 21, 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 21, 2026
13	Girnar Care	Indirect evidence	Jaipur, IndiaHQ checked Sep 21, 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 21, 2026
14	Digital WEB Solutions	Partial evidence	United StatesHQ checked Sep 21, 2026	501-1,000	623 contacts →
	Partial evidence “Digital Web Solutions is a global name in the digital marketing space.” Source: RevenueBase Database · checked Sep 21, 2026
15	SGT	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	557 contacts →
	Partial evidence “After almost 2 years driving internal demand at one of Omnicom's lead Marketing strategy agencies I have returned to Lead to Market to lead our applied marketing practice.” Source: RevenueBase Database · checked Sep 21, 2026
16	Telenet Marketing Solutions	Indirect evidence	Athens, GA, IndiaHQ checked Sep 21, 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 21, 2026
17	Movingdneedle Pvt. LTD	Partial evidence	Sterling Heights, MI, United StatesHQ checked Sep 21, 2026	51-200	528 contacts →
	Partial 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 21, 2026
18	Callbox INC	Indirect evidence	Encino, CA, United StatesHQ checked Sep 21, 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 21, 2026
19	KCM	Partial evidence	Seoul, South KoreaHQ checked Sep 21, 2026	n/a	494 contacts →
	Partial evidence “KC Marketing” Source: RevenueBase Database · checked Sep 21, 2026
20	Demandshore	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	501-1,000	478 contacts →
	Partial 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 21, 2026
21	Sg360	Indirect evidence	Wheeling, IL, United StatesHQ checked Sep 21, 2026	501-1,000	477 contacts →
	Indirect evidence “sg360° can help you identify and connect with your best prospects 1:1, both offline and on.” Source: RevenueBase Database · checked Sep 21, 2026
22	Saleshive	Indirect evidence	Denver, CO, United StatesHQ checked Sep 21, 2026	51-200	455 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
23	Qualifa	Partial evidence	Brighton, United KingdomHQ checked Sep 21, 2026	51-200	440 contacts →
	Partial 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 21, 2026
24	Alliance Pdms	Indirect evidence	Hurst, TX, United StatesHQ checked Sep 21, 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 21, 2026
25	MVF	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	401 contacts →
	Indirect evidence “MVF powers growth for our clients by connecting them to potential customers.” Source: RevenueBase Database · checked Sep 21, 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 marketing 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 outbound marketing services.
Partial evidence: Its own public description names part of outbound marketing services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outbound marketing 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 26,926 outbound marketing services worldwide

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Outbound marketing services worldwide at a glance

As of Sep 21, 2026

13.4%Verified-email coverage

7.1Average contacts per company

1-10Median size (employees)

1.9%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

17,657

11-50

6,926

51-200

1,691

201-500

425

501-1,000

106

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 outbound marketing 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 outbound marketing services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “outbound marketing 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 outbound marketing 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 outbound marketing 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, 25,497 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 21, 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 marketing services by location

107 lists · largest first

Every Outbound marketing services 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 marketing 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 outbound marketing services are there worldwide?

RevenueBase identified 26,926 outbound marketing 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?

Xdbs Worldwide, headquartered in Dubai, tops this list with the largest team on record.

Which country has the most outbound marketing services?

The United States leads with 7,123 companies, followed by India (2,684) and the United Kingdom (1,905). Every outbound marketing services list by country and city is linked on this page.

Which city has the most outbound marketing services?

London leads with 506 headquartered companies, followed by Pune (470) and New York (239).

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 25,497 verified decision-maker contacts tracked across these 26,926 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 21, 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.