Company lists · Data refreshed September 2026

Top 25 Outbound marketing service providers worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 16,966 companies tracked

RevenueBase identified 16,966 outbound marketing service providers worldwide as of September 2026 and tracks 156,561 professional contacts across them, including 23,164 with verified work emails and 0 with mobile numbers. The United States is the largest market and Pune the largest hub.

This list covers outbound marketing service providers 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 14, 2026. Country and city lists for outbound marketing service providers 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 14, 2026 86% judged on-target in blind review

16,966Companies

156,561Contacts tracked

23,164Verified emails

0Mobile numbers

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The 25 largest outbound marketing service providers worldwide

Ranked by team size

Top 25 of 16,966 outbound marketing service providers worldwide, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to outbound marketing service providers: 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 14, 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 14, 2026
2	Best Version Media	Partial evidence	Brookfield, WI, United StatesHQ checked Sep 14, 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 14, 2026
3	Webhelp Enterprise	Indirect evidence	Paris, FranceHQ checked Sep 14, 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 14, 2026
4	2x	Partial evidence	Malvern, PA, United StatesHQ checked Sep 14, 2026	1,001-5,000	1,046 contacts →
	Partial evidence “2X is the global leader in B2B marketing-as-a-service (MaaS), a subscription-based alternative to traditional B2B marketing delivery models.” Source: RevenueBase Database · checked Sep 14, 2026
5	Inktel Contact Center Solutions	Indirect evidence	Doral, FL, United StatesHQ checked Sep 14, 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 14, 2026
6	S2w Media	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 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 14, 2026
7	ZAZ Vendas	Indirect evidence	Campinas, BrazilHQ checked Sep 14, 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 14, 2026
8	Innerworkings	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	1,001-5,000	757 contacts →
	Partial evidence “Founded in 1991, HH Global is a global outsourced marketing execution provider.” Source: RevenueBase Database · checked Sep 14, 2026
9	Manlitics B2B Ites	Partial evidence	New York, United StatesHQ checked Sep 14, 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 14, 2026
10	Anteriad	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	501-1,000	740 contacts →
	Indirect evidence “Data Driven.” Source: RevenueBase Database · checked Sep 14, 2026
11	Abstrakt Marketing Group	Indirect evidence	St Louis, MO, United StatesHQ checked Sep 14, 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 14, 2026
12	Salebuild	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 14, 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 14, 2026
13	Flexisales INC	Indirect evidence	Las Vegas, NV, United StatesHQ checked Sep 14, 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 14, 2026
14	Girnar Care	Indirect evidence	Jaipur, IndiaHQ checked Sep 14, 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 14, 2026
15	SGT	Partial evidence	Houston, TX, United StatesHQ checked Sep 14, 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 14, 2026
16	Telenet Marketing Solutions	Indirect evidence	Athens, GA, IndiaHQ checked Sep 14, 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 14, 2026
17	Movingdneedle Pvt. LTD	Partial evidence	Sterling Heights, MI, United StatesHQ checked Sep 14, 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 14, 2026
18	Callbox INC	Indirect evidence	Encino, CA, United StatesHQ checked Sep 14, 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 14, 2026
19	Transcosmos Asia Philippines INC	Indirect evidence	Pasig, PhilippinesHQ checked Sep 14, 2026	10001+	496 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
20	Mittera	Partial evidence	Des Moines, IA, United StatesHQ checked Sep 14, 2026	1,001-5,000	491 contacts →
	Partial evidence “We help companies grow their business, drive brand awareness and achieve their marketing goals.” Source: RevenueBase Database · checked Sep 14, 2026
21	Demandshore	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 14, 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 14, 2026
22	Sg360	Indirect evidence	Wheeling, IL, United StatesHQ checked Sep 14, 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 14, 2026
23	Saleshive	Indirect evidence	Denver, CO, United StatesHQ checked Sep 14, 2026	51-200	455 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
24	Qualifa	Partial evidence	Brighton, United KingdomHQ checked Sep 14, 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 14, 2026
25	MVF	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	201-500	401 contacts →
	Indirect evidence “MVF powers growth for our clients by connecting them to potential customers.” Source: RevenueBase Database · checked Sep 14, 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 service providers. 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 service providers.
Partial evidence: Its own public description names part of outbound marketing service providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outbound marketing service providers. 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 16,966 outbound marketing service providers worldwide

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Outbound marketing service providers worldwide at a glance

As of Sep 14, 2026

14.8%Verified-email coverage

9.2Average contacts per company

1-10Median size (employees)

2.7%Largest-city concentration · Pune

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

10,396

11-50

4,815

51-200

1,276

201-500

326

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 marketing service providers, 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: 39 countries, largest first: the United States, India, the United Kingdom, Canada, Pakistan, Australia, Brazil, the Netherlands, Germany, France and 29 more. Country and city lists for outbound marketing service providers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “outbound marketing service providers”. 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 service providers), 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 service providers, 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, 23,164 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 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 marketing service providers by location

88 lists · largest first

Every Outbound marketing service providers 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 service providers, 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 service providers are there worldwide?

RevenueBase identified 16,966 outbound marketing service providers 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 service providers?

The United States leads with 6,078 companies, followed by India (2,298) and the United Kingdom (1,661). Every outbound marketing service providers list by country and city is linked on this page.

Which city has the most outbound marketing service providers?

Pune leads with 463 headquartered companies, followed by London (460) and New York (252).

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 23,164 verified decision-maker contacts tracked across these 16,966 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 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.