Company lists · Data refreshed September 2026

Top 25 Outbound sales consulting firms worldwide

Name: Outbound sales consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 24,455 companies tracked

RevenueBase identified 24,455 outbound sales consulting firms worldwide as of September 2026 and tracks 157,200 professional contacts across them, including 21,075 with verified work emails. The United States is the largest market and London the largest hub.

This list covers outbound sales consulting 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 outbound sales consulting 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

24,455Companies

157,200Contacts tracked

21,075Verified emails

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The 25 largest outbound sales consulting firms worldwide

Ranked by team size

Top 25 of 24,455 outbound sales consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to outbound sales consulting 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	Marketsource INC	Partial evidence	Alpharetta, GA, United StatesHQ checked Sep 29, 2026	5,001-10,000	3,063 contacts →
	Partial evidence “MarketSource, an Allegis Group company, is a sales acceleration company focused on delivering better outcomes for many of the world’s most iconic brands.” Source: RevenueBase Database · checked Sep 29, 2026
2	Marketstar	Partial evidence	Ogden, UT, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,446 contacts →
	Partial evidence “MarketStar is a global B2B sales outsourcing leader with 38+ years of experience driving predictable revenue growth.” Source: RevenueBase Database · checked Sep 29, 2026
3	Webhelp Enterprise	Partial evidence	Paris, FranceHQ checked Sep 29, 2026	10001+	1,795 contacts →
	Partial evidence “The Concentrix B2B sales practice is here to design, build and run projects for our clients.” Source: RevenueBase Database · checked Sep 29, 2026
4	Full Potential Solutions	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,238 contacts →
	Indirect evidence “Full Potential Solutions (FPS) is a new kind of performance-based outsourcing firm that puts culture and employees first, because we believe that happy, fulfilled teams accomplish…” Source: RevenueBase Database · checked Sep 29, 2026
5	crystel.co	Indirect evidence	Amman, JordanHQ checked Sep 29, 2026	1,001-5,000	1,128 contacts →
	Indirect evidence “Crystel emerged as a leading Outsourcing Service Provider (OSP) since its establishment in Jordan in early 2007.” Source: RevenueBase Database · checked Sep 29, 2026
6	Inktel Contact Center Solutions	Indirect evidence	Doral, FL, United StatesHQ checked Sep 29, 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 29, 2026
7	Servestsa	Indirect evidence	Caracas, VenezuelaHQ checked Sep 29, 2026	n/a	865 contacts →
	Indirect evidence “Statistics first” Source: RevenueBase Database · checked Sep 29, 2026
8	ZAZ Vendas	Indirect evidence	Campinas, BrazilHQ checked Sep 29, 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 29, 2026
9	Abstrakt Marketing Group	Indirect evidence	St Louis, MO, United StatesHQ checked Sep 29, 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 29, 2026
10	Salebuild	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 29, 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 29, 2026
11	Infinity	Strong evidence	Cedar Rapids, IA, United StatesHQ checked Sep 29, 2026	501-1,000	609 contacts →
	Strong evidence “Infinity is an award-winning inside sales agency and consulting firm with 30 years of experience helping B2B companies maximize sales and drive revenue.” Source: RevenueBase Database · checked Sep 29, 2026
12	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
13	Movingdneedle Pvt. LTD	Partial evidence	Sterling Heights, MI, United StatesHQ checked Sep 29, 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 29, 2026
14	Callbox INC	Indirect evidence	Encino, CA, United StatesHQ checked Sep 29, 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 29, 2026
15	Saleshive	Indirect evidence	Denver, CO, United StatesHQ checked Sep 29, 2026	51-200	455 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
16	3eriza	Indirect evidence	Surquillo, PeruHQ checked Sep 29, 2026	1,001-5,000	391 contacts →
	Indirect evidence “3eriza es una consultora especializada en el diseño, implementación y optimización de la provisión de servicios a empresas, brindando soporte en dos frentes: Asesorando a empresas…” Source: RevenueBase Database · checked Sep 29, 2026
17	The Lead Market	Indirect evidence	Nagpur, IndiaHQ checked Sep 29, 2026	51-200	387 contacts →
	Indirect evidence “TLM empowers businesses to generate revenue through their qualified leads.” Source: RevenueBase Database · checked Sep 29, 2026
18	EBQ	Partial evidence	Austin, TX, United StatesHQ checked Sep 29, 2026	201-500	377 contacts →
	Partial evidence “EBQ is an outsourced sales and marketing organization that provides services to help companies scale.” Source: RevenueBase Database · checked Sep 29, 2026
19	Cobmax	Partial evidence	Sao Jose Do Rio Preto, BrazilHQ checked Sep 29, 2026	501-1,000	376 contacts →
	Partial evidence “A Cobmax é uma Sales Center com inteligência em vendas, fruto de metodologia própria, testada e aprovada em 11 anos de experiência.” Source: RevenueBase Database · checked Sep 29, 2026
20	Miller Heiman Group, A Korn Ferry Company	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	501-1,000	371 contacts →
	Indirect evidence “Miller Heiman Group is now part of Korn Ferry.” Source: RevenueBase Database · checked Sep 29, 2026
21	Ranger	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	201-500	364 contacts →
	Indirect evidence “Ranger est une société française rattachée au groupe Ranger Marketing, fondé en 1992 et basé en Allemagne dans la ville de Düsseldorf.” Source: RevenueBase Database · checked Sep 29, 2026
22	Freelan	Indirect evidence	Huixquilucan, MexicoHQ checked Sep 29, 2026	n/a	340 contacts →
	Indirect evidence “En Freelan, creemos que el crecimiento sostenible no es fruto del azar, sino de un sistema bien diseñado.” Source: RevenueBase Database · checked Sep 29, 2026
23	Jumpcrew	Partial evidence	Nashville, TN, United StatesHQ checked Sep 29, 2026	201-500	339 contacts →
	Partial evidence “Launch-ready sales teams, experienced leaders, and time-tested processes to help you acquire new customers faster and with less risk than doing it alone.” Source: RevenueBase Database · checked Sep 29, 2026
24	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
25	Cydcor	Indirect evidence	Agoura Hills, CA, United StatesHQ checked Sep 29, 2026	51-200	328 contacts →
	Indirect evidence “We create opportunity: For our clients, our team, and the future.” 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: outbound sales consulting 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 outbound sales consulting firms.
Partial evidence: Its own public description names part of outbound sales consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outbound sales consulting 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 24,455 outbound sales consulting firms worldwide

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Outbound sales consulting firms worldwide at a glance

As of Sep 29, 2026

13.4%Verified-email coverage

6.4Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

17,924

11-50

4,860

51-200

1,233

201-500

276

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 outbound sales consulting 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 outbound sales consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “outbound sales consulting 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 outbound sales consulting 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 outbound sales consulting 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, 21,075 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.

Outbound sales consulting firms by location

110 lists · largest first

Every Outbound sales consulting 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 outbound sales consulting 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 outbound sales consulting firms are there worldwide?

RevenueBase identified 24,455 outbound sales consulting 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?

Marketsource INC, headquartered in Alpharetta, tops this list with the largest team on record.

Which country has the most outbound sales consulting firms?

The United States leads with 6,020 companies, followed by the United Kingdom (1,673) and Brazil (1,287). Every outbound sales consulting firms list by country and city is linked on this page.

Which city has the most outbound sales consulting firms?

London leads with 557 headquartered companies, followed by Sao Paulo (328) and Paris (253).

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 21,075 verified decision-maker contacts tracked across these 24,455 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.