Company lists · Data refreshed September 2026

Top 25 B2B lead generation and marketing agencies worldwide

Name: B2B lead generation and marketing agencies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 29,502 companies tracked

RevenueBase identified 29,502 B2B lead generation and marketing agencies worldwide as of September 2026 and tracks 224,044 professional contacts across them, including 42,536 with verified work emails. The United States is the largest market and London the largest hub.

This list covers B2B lead generation and marketing 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 21, 2026. Country and city lists for B2B lead generation and marketing 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 21, 2026 86% judged on-target in blind review

29,502Companies

224,044Contacts tracked

42,536Verified emails

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The 25 largest B2B lead generation and marketing agencies worldwide

Ranked by team size

Top 25 of 29,502 B2B lead generation and marketing agencies worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to B2B lead generation and marketing 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	Zoominfo	Indirect evidence	Vancouver, WA, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,029 contacts →
	Indirect evidence “ZoomInfo (NASDAQ: GTM) is the go-to-market platform that helps businesses find, acquire and grow their customers.” Source: RevenueBase Database · checked Sep 21, 2026
2	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
3	Webhelp Enterprise	Partial evidence	Paris, FranceHQ checked Sep 21, 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 21, 2026
4	6sense	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,443 contacts →
	Partial evidence “6sense is on a mission to revolutionize the way B2B organizations create revenue by predicting customers most likely to buy and recommending the best course of action to engage…” Source: RevenueBase Database · checked Sep 21, 2026
5	Verticurl A WPP Company	Partial evidence	SingaporeHQ checked Sep 21, 2026	1,001-5,000	1,256 contacts →
	Partial evidence “Verticurl, a division of Ogilvy, was established in 2006 with the mission to be the world’s leading marketing technology services agency for multinational organizations.” Source: RevenueBase Database · checked Sep 21, 2026
6	Demandscience	Indirect evidence	Boston, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,087 contacts →
	Indirect evidence “With proprietary data and omni-channel activation like events, content, programmatic and chat, we cut through the noise to reach entire buyer groups, driving engagement and impact…” Source: RevenueBase Database · checked Sep 21, 2026
7	Cience	Strong evidence	Miami, FL, United StatesHQ checked Sep 21, 2026	201-500	1,068 contacts →
	Strong 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 21, 2026
8	2x	Strong evidence	Malvern, PA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,046 contacts →
	Strong 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 21, 2026
9	Machbizz Marketers PVT LTD	Strong evidence	Pune, IndiaHQ checked Sep 21, 2026	501-1,000	967 contacts →
	Strong 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 21, 2026
10	Ziff Davis Performance Marketing	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	821 contacts →
	Indirect evidence “ZDPM is the coming together of Salesify and DemandShore.” Source: RevenueBase Database · checked Sep 21, 2026
11	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
12	Infuse	Strong evidence	Boca Raton, FL, United StatesHQ checked Sep 21, 2026	1,001-5,000	796 contacts →
	Strong evidence “Demand Excellence Delivered We are INFUSE, a global B2B demand and revenue marketing performance company.” Source: RevenueBase Database · checked Sep 21, 2026
13	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
14	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
15	Abstrakt Marketing Group	Partial evidence	St Louis, MO, United StatesHQ checked Sep 21, 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 21, 2026
16	Salebuild	Strong evidence	Redwood City, CA, United StatesHQ checked Sep 21, 2026	n/a	708 contacts →
	Strong 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
17	Flexisales INC	Strong evidence	Las Vegas, NV, United StatesHQ checked Sep 21, 2026	201-500	697 contacts →
	Strong 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
18	Kestone	Strong evidence	Mohan Cooperative Industrial, United Arab EmiratesHQ checked Sep 21, 2026	201-500	638 contacts →
	Strong evidence “We’re a 28 years old B2B marketing agency.” Source: RevenueBase Database · checked Sep 21, 2026
19	Multiview	Strong evidence	Irving, TX, United StatesHQ checked Sep 21, 2026	501-1,000	616 contacts →
	Strong 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 21, 2026
20	CMD	Indirect evidence	Portland, OR, United StatesHQ checked Sep 21, 2026	n/a	604 contacts →
	Indirect evidence “Take command of every opportunity with a partner that gets results.” Source: RevenueBase Database · checked Sep 21, 2026
21	Digitalzone	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	558 contacts →
	Strong evidence “Digitalzone is a global marketing and demand gen company dedicated to delivering compliant leads, exceptional customer satisfaction, and an end-to-end approach.” Source: RevenueBase Database · checked Sep 21, 2026
22	SGT	Strong evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	557 contacts →
	Strong 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
23	Telenet Marketing Solutions	Partial evidence	Athens, GA, IndiaHQ checked Sep 21, 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 21, 2026
24	Movingdneedle Pvt. LTD	Strong evidence	Sterling Heights, MI, United StatesHQ checked Sep 21, 2026	51-200	528 contacts →
	Strong 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
25	Callbox INC	Strong evidence	Encino, CA, United StatesHQ checked Sep 21, 2026	201-500	499 contacts →
	Strong 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

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 lead generation and marketing 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 lead generation and marketing agencies.
Partial evidence: Its own public description names part of B2B lead generation and marketing agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name B2B lead generation and marketing 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 29,502 B2B lead generation and marketing agencies worldwide

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B2B lead generation and marketing agencies worldwide at a glance

As of Sep 21, 2026

19.0%Verified-email coverage

7.6Average contacts per company

1-10Median size (employees)

2.8%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

19,809

11-50

7,622

51-200

1,575

201-500

336

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 lead generation and marketing 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 lead generation and marketing agencies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “B2B lead generation and marketing 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 lead generation and marketing 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 lead generation and marketing 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, 42,536 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.

B2B lead generation and marketing agencies by location

121 lists · largest first

Every B2B lead generation and marketing 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 lead generation and marketing 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 lead generation and marketing agencies are there worldwide?

RevenueBase identified 29,502 B2B lead generation and marketing 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?

Zoominfo, headquartered in Vancouver, tops this list with the largest team on record.

Which country has the most B2B lead generation and marketing agencies?

The United States leads with 7,684 companies, followed by India (2,843) and the United Kingdom (2,401). Every B2B lead generation and marketing agencies list by country and city is linked on this page.

Which city has the most B2B lead generation and marketing agencies?

London leads with 831 headquartered companies, followed by Pune (569) and New York (346).

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 42,536 verified decision-maker contacts tracked across these 29,502 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.