Company lists · Data refreshed September 2026

Top 25 B2B sales development agencies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 27,272 companies tracked

RevenueBase identified 27,272 B2B sales development agencies worldwide as of September 2026 and tracks 216,126 professional contacts across them, including 36,015 with verified work emails. The United States is the largest market and London the largest hub.

This list covers B2B sales development agencies 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 development agencies 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

27,272Companies

216,126Contacts tracked

36,015Verified emails

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The 25 largest B2B sales development agencies worldwide

Ranked by team size

Top 25 of 27,272 B2B sales development agencies 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 development agencies: 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	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
2	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
3	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
4	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
5	Cience	Indirect evidence	Miami, FL, United StatesHQ checked Sep 27, 2026	201-500	1,068 contacts →
	Indirect evidence “CIENCE Technologies, Inc, founded in 2015 and headquartered in Denver, CO, is a pioneering global company in lead generation software and services, committed to transforming the…” Source: RevenueBase Database · checked Sep 27, 2026
6	Machbizz Marketers PVT LTD	Partial evidence	Pune, IndiaHQ checked Sep 27, 2026	501-1,000	967 contacts →
	Partial evidence “MachBizz is a mission itself with a strong urge to accomplish its vision of B2B Digital Marketing and lead generation.” Source: RevenueBase Database · checked Sep 27, 2026
7	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
8	Ziff Davis Performance Marketing	Indirect evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	821 contacts →
	Indirect evidence “ZDPM is the coming together of Salesify and DemandShore.” Source: RevenueBase Database · checked Sep 27, 2026
9	Infuse	Partial evidence	Boca Raton, FL, United StatesHQ checked Sep 27, 2026	1,001-5,000	796 contacts →
	Partial evidence “Demand Excellence Delivered We are INFUSE, a global B2B demand and revenue marketing performance company.” Source: RevenueBase Database · checked Sep 27, 2026
10	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
11	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
12	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
13	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
14	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
15	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
16	Kestone	Partial evidence	Mohan Cooperative Industrial, United Arab EmiratesHQ checked Sep 27, 2026	201-500	638 contacts →
	Partial evidence “We’re a 28 years old B2B marketing agency.” Source: RevenueBase Database · checked Sep 27, 2026
17	Multiview	Partial evidence	Irving, TX, United StatesHQ checked Sep 27, 2026	501-1,000	616 contacts →
	Partial evidence “Multiview is a B2B digital marketing agency helping associations and businesses reach, engage and grow their most valued relationships.” Source: RevenueBase Database · checked Sep 27, 2026
18	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
19	CMD	Indirect evidence	Portland, OR, United StatesHQ checked Sep 27, 2026	n/a	604 contacts →
	Indirect evidence “Take command of every opportunity with a partner that gets results.” Source: RevenueBase Database · checked Sep 27, 2026
20	Telenet Marketing Solutions	Partial evidence	Athens, GA, IndiaHQ checked Sep 27, 2026	201-500	553 contacts →
	Partial 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 27, 2026
21	Cognism	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	201-500	530 contacts →
	Strong evidence “Cognism provides accurate, compliant-first B2B data and sales intelligence for teams growing across Europe and beyond.” Source: RevenueBase Database · checked Sep 27, 2026
22	Movingdneedle Pvt. LTD	Partial evidence	Sterling Heights, MI, United StatesHQ checked Sep 27, 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 27, 2026
23	The Pipeline Group	Partial evidence	San Jose, CA, United StatesHQ checked Sep 27, 2026	201-500	523 contacts →
	Partial evidence “The Pipeline Group helps B2B tech companies scale pipeline fast through our SDR-as-a-Service model.” Source: RevenueBase Database · checked Sep 27, 2026
24	Callbox INC	Indirect evidence	Encino, CA, United StatesHQ checked Sep 27, 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 27, 2026
25	Iresearch Services	Indirect evidence	London, United StatesHQ checked Sep 27, 2026	201-500	495 contacts →
	Indirect evidence “We get it.” 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 development agencies. 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 development agencies.
Partial evidence: Its own public description names part of B2B sales development agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name B2B sales development agencies. 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 27,272 B2B sales development agencies worldwide

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B2B sales development agencies worldwide at a glance

As of Sep 27, 2026

16.7%Verified-email coverage

7.9Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

18,647

11-50

6,753

51-200

1,420

201-500

319

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 B2B sales development agencies, 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 development agencies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “B2B sales development agencies”. 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 development agencies), 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 development agencies, 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, 36,015 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 development agencies by location

108 lists · largest first

Every B2B sales development agencies 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 development agencies, 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 development agencies are there worldwide?

RevenueBase identified 27,272 B2B sales development agencies 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 B2B sales development agencies?

The United States leads with 6,180 companies, followed by the United Kingdom (2,313) and India (1,874). Every B2B sales development agencies list by country and city is linked on this page.

Which city has the most B2B sales development agencies?

London leads with 838 headquartered companies, followed by Pune (462) and New York (335).

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 36,015 verified decision-maker contacts tracked across these 27,272 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.