Company lists · Data refreshed September 2026

Top 25 B2B sales outsourcing firms worldwide

Name: B2B sales outsourcing firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 21,132 companies tracked

RevenueBase identified 21,132 B2B sales outsourcing firms worldwide as of September 2026 and tracks 225,965 professional contacts across them, including 26,444 with verified work emails. The United States is the largest market and London the largest hub.

This list covers B2B sales outsourcing 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 27, 2026. Country and city lists for B2B sales outsourcing 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 27, 2026 86% judged on-target in blind review

21,132Companies

225,965Contacts tracked

26,444Verified emails

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The 25 largest B2B sales outsourcing firms worldwide

Ranked by team size

Top 25 of 21,132 B2B sales outsourcing firms worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to B2B sales outsourcing 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	V4 Company	Indirect evidence	Campinas, BrazilHQ checked Sep 27, 2026	1,001-5,000	5,079 contacts →
	Indirect evidence “Somos uma assessoria de marketing focada em construir e otimizar o processo de vendas através da internet conectando pessoas que geram resultados com empresas que buscam vender…” Source: RevenueBase Database · checked Sep 27, 2026
2	Salesland	Partial evidence	Madrid, MexicoHQ checked Sep 27, 2026	10001+	4,245 contacts →
	Partial evidence “We are Sales Specialists.” Source: RevenueBase Database · checked Sep 27, 2026
3	Xdbs Worldwide	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 27, 2026	1,001-5,000	3,498 contacts →
	Indirect 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 27, 2026
4	Marketsource INC	Partial evidence	Alpharetta, GA, United StatesHQ checked Sep 27, 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 27, 2026
5	Marketstar	Strong evidence	Ogden, UT, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,446 contacts →
	Strong evidence “MarketStar is a global B2B sales outsourcing leader with 38+ years of experience driving predictable revenue growth.” Source: RevenueBase Database · checked Sep 27, 2026
6	Denave	Indirect evidence	Noida, IndiaHQ checked Sep 27, 2026	5,001-10,000	2,270 contacts →
	Indirect evidence “We are revenue AI-X-lerators.” Source: RevenueBase Database · checked Sep 27, 2026
7	Allied Global	Indirect evidence	GuatemalaHQ checked Sep 27, 2026	5,001-10,000	1,979 contacts →
	Indirect evidence “Regardless of your Company’s size (from Start-ups to Fortune 500), business vertical or service requirements, we act as a seamless extension of your team to help you grow, and…” Source: RevenueBase Database · checked Sep 27, 2026
8	Webhelp Enterprise	Strong evidence	Paris, FranceHQ checked Sep 27, 2026	10001+	1,795 contacts →
	Strong evidence “The Concentrix B2B sales practice is here to design, build and run projects for our clients.” Source: RevenueBase Database · checked Sep 27, 2026
9	Netambit	Indirect evidence	Noida, IndiaHQ checked Sep 27, 2026	10001+	1,584 contacts →
	Indirect evidence “NetAmbit helps businesses build a sustainable advantage by accelerating growth in high-touch offline areas.” Source: RevenueBase Database · checked Sep 27, 2026
10	Full Potential Solutions	Partial evidence	Waltham, MA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,238 contacts →
	Partial 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 27, 2026
11	Credico	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	n/a	1,188 contacts →
	Indirect evidence “Credico is the world's leading face-to-face customer acquisition agency, helping our clients attract and retain loyal customers.” Source: RevenueBase Database · checked Sep 27, 2026
12	Rewardsco	Indirect evidence	Durban, South AfricaHQ checked Sep 27, 2026	1,001-5,000	917 contacts →
	Indirect evidence “Our People.” Source: RevenueBase Database · checked Sep 27, 2026
13	Inktel Contact Center Solutions	Indirect evidence	Doral, FL, United StatesHQ checked Sep 27, 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 27, 2026
14	Horatio	Partial evidence	New York, United StatesHQ checked Sep 27, 2026	1,001-5,000	860 contacts →
	Partial evidence “Horatio is a premier, tech-enabled outsourcing partner helping ambitious companies scale customer experience and complex business operations without compromising quality…” Source: RevenueBase Database · checked Sep 27, 2026
15	Memoryblue	Partial evidence	Tysons, VA, United StatesHQ checked Sep 27, 2026	501-1,000	825 contacts →
	Partial evidence “memoryBlue is the go-to partner for revenue leaders in B2B Tech looking to grow their pipeline engine.” Source: RevenueBase Database · checked Sep 27, 2026
16	ZAZ Vendas	Indirect evidence	Campinas, BrazilHQ checked Sep 27, 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 27, 2026
17	CPM International	Strong evidence	Thame, United KingdomHQ checked Sep 27, 2026	10001+	777 contacts →
	Strong evidence “CPM is an international sales outsourcing and customer experience agency.” Source: RevenueBase Database · checked Sep 27, 2026
18	Anteriad	Indirect evidence	New York, NY, United StatesHQ checked Sep 27, 2026	501-1,000	740 contacts →
	Indirect evidence “Data Driven.” Source: RevenueBase Database · checked Sep 27, 2026
19	Abstrakt Marketing Group	Partial evidence	St Louis, MO, United StatesHQ checked Sep 27, 2026	501-1,000	724 contacts →
	Partial evidence “We book the qualified meetings that fill your pipeline for any B2B company ready to grow.” Source: RevenueBase Database · checked Sep 27, 2026
20	Talksure	Indirect evidence	Durban, South AfricaHQ checked Sep 27, 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 27, 2026
21	Salebuild	Partial evidence	Redwood City, CA, United StatesHQ checked Sep 27, 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 27, 2026
22	Flexisales INC	Partial evidence	Las Vegas, NV, United StatesHQ checked Sep 27, 2026	201-500	697 contacts →
	Partial evidence “Flexisales, is a global frontrunner in B2B Lead & Demand Generation and Data Services, serving technology companies & agencies worldwide.” Source: RevenueBase Database · checked Sep 27, 2026
23	Girnar Care	Indirect evidence	Jaipur, IndiaHQ checked Sep 27, 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 27, 2026
24	DMF Sales&marketing	Partial evidence	Asnières Sur Seine, FranceHQ checked Sep 27, 2026	201-500	632 contacts →
	Partial evidence “MISSION DMF sales and marketing est un des tous premiers prestataires d’externalisation commerciale en France.” Source: RevenueBase Database · checked Sep 27, 2026
25	Infinity	Strong evidence	Cedar Rapids, IA, United StatesHQ checked Sep 27, 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 27, 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: B2B sales outsourcing 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 B2B sales outsourcing firms.
Partial evidence: Its own public description names part of B2B sales outsourcing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name B2B sales outsourcing 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 21,132 B2B sales outsourcing firms worldwide

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B2B sales outsourcing firms worldwide at a glance

As of Sep 27, 2026

11.7%Verified-email coverage

10.7Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

12,058

11-50

6,287

51-200

2,019

201-500

512

501-1,000

136

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 B2B sales outsourcing 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 B2B sales outsourcing firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “B2B sales outsourcing 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 B2B sales outsourcing 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 B2B sales outsourcing 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, 26,444 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 27, 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.

B2B sales outsourcing firms by location

80 lists · largest first

Every B2B sales outsourcing 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 B2B sales outsourcing 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 B2B sales outsourcing firms are there worldwide?

RevenueBase identified 21,132 B2B sales outsourcing 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?

V4 Company, headquartered in Campinas, tops this list with the largest team on record.

Which country has the most B2B sales outsourcing firms?

The United States leads with 4,576 companies, followed by India (1,848) and the United Kingdom (1,503). Every B2B sales outsourcing firms list by country and city is linked on this page.

Which city has the most B2B sales outsourcing firms?

London leads with 508 headquartered companies, followed by Pune (391) and New York (231).

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 26,444 verified decision-maker contacts tracked across these 21,132 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 27, 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.