Company lists · Data refreshed November 2026

Top 25 Adtech and martech companies worldwide

Name: Adtech and martech companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 10,147 companies tracked

RevenueBase identified 10,147 company matches for adtech and martech companies worldwide as of November 2026 and tracks 232,521 professional contacts across them, including 74,602 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for adtech and martech companies worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 5, 2026. Country and city lists for adtech and martech companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 5, 2026 How this list was built

10,147Companies

232,521Contacts tracked

74,602Verified emails

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The 25 largest adtech and martech companies worldwide

Ranked by team size

Top 25 of 10,147 company matches for adtech and martech companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Hubspot	Exact match	Cambridge, United StatesHQ recorded Nov 5, 2026	5,001-10,000	11,646 contacts →
	Exact match “HubSpot is a leading agentic customer platform that provides software and support to help businesses grow better.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	Epsilon	Exact match	Irving, United StatesHQ recorded Nov 5, 2026	5,001-10,000	10,260 contacts →
	Exact match “Epsilon is a global leader in data and identity with deep expertise in digital media, clean rooms, customer data platforms, loyalty and marketing services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3	Publicis Media	Exact match	London, United KingdomHQ recorded Nov 5, 2026	10001+	7,259 contacts →
	Exact match “Publicis Media harnesses the power of modern media through leading agency brands Dysrupt, Infinite Roar, Publicis Collective, Publicis Health Media, Spark Foundry, Starcom and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4	HIBU	Exact match	Cedar Rapids, IA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	4,702 contacts →
	Exact match “Hibu is a leading provider of technology-driven, integrated digital marketing solutions for America’s local businesses, trusted by tens of thousands of local business owners.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5	Zoominfo	Exact match	Vancouver, MA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	4,262 contacts →
	Exact match “ZoomInfo (NASDAQ: GTM) is the go-to-market platform that helps businesses find, acquire and grow their customers.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6	PHD	Exact match	Bankside, United KingdomHQ recorded Nov 5, 2026	1,001-5,000	4,197 contacts →
	Exact match “Welcome to PHD.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	Xdbs Worldwide	Exact match	Dubai, United Arab EmiratesHQ recorded Nov 5, 2026	1,001-5,000	3,609 contacts →
	Exact match “At XDBS, we primarily work with media agencies, publishers and marketing companies looking to leverage marketing automation and digital marketing capacity and capability to…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	Zeta Global	Exact match	New York, United StatesHQ recorded Nov 5, 2026	1,001-5,000	3,122 contacts →
	Exact match “At Zeta Global (NYSE: ZETA), we help enterprise brands and agencies Achieve the Impossible™ with superintelligent marketing.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9	Klaviyo	Exact match	Boston, MA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,980 contacts →
	Exact match “Klaviyo (NYSE: KVYO) is the autonomous B2C CRM.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	DEXYP	Exact match	Dallas, TX, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,922 contacts →
	Exact match “2019 Thryv, Inc.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	Best Version Media	Exact match	Brookfield, WI, United StatesHQ recorded Nov 5, 2026	n/a	2,470 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12	BRAZE	Exact match	New York, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,328 contacts →
	Exact match “Braze is the leading customer engagement platform that empowers brands to Be Absolutely Engaging.™ Braze allows any marketer to collect and take action on any amount of data from…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	media.net	Exact match	Dubai, United Arab EmiratesHQ recorded Nov 5, 2026	1,001-5,000	2,118 contacts →
	Exact match “Media.net is an independent advertising technology platform that helps publishers, advertisers, and agencies achieve measurable outcomes across all formats and mediums.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Stackadapt	Exact match	Toronto, ON, CanadaHQ recorded Nov 5, 2026	1,001-5,000	1,833 contacts →
	Exact match “StackAdapt is the leading technology company that empowers marketers to reach, engage, and convert audiences with precision.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	Constant Contact	Exact match	Waltham, MA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,716 contacts →
	Exact match “We deliver for small businesses with powerful tools to simplify and amplify digital marketing.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	Optimizely	Exact match	New York, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,642 contacts →
	Exact match “Optimizely is the AI platform for marketing, built for the experience-makers who shape how brands show up in the world.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Appsflyer	Exact match	San Francisco, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,583 contacts →
	Exact match “AppsFlyer is the Modern Marketing Cloud that helps businesses transform complex data into clarity and growth.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	Localiq	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,550 contacts →
	Exact match “Grow your business with digital marketing powered by AI and local expertise.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	Intuit Mailchimp	Exact match	Atlanta, GA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,430 contacts →
	Exact match “The Mailchimpossibilities are endless when you create, automate, and optimize your marketing with Mailchimp.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Freewheel	Exact match	New York, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,355 contacts →
	Exact match “FreeWheel’s TV and video advertising technology is built for today’s ever-evolving multiscreen ecosystem.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	Pubmatic	Exact match	Redwood City, United StatesHQ recorded Nov 5, 2026	501-1,000	1,285 contacts →
	Exact match “PubMatic is the leading AI-powered ad tech company delivering digital advertising performance.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Centro	Exact match	Chicago, WA, United StatesHQ recorded Nov 5, 2026	501-1,000	1,259 contacts →
	Exact match “Basis Technologies is a global provider of workflow automation, intelligence and programmatic trading software for the marketing enterprise.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Scorpion	Exact match	Draper, UT, United StatesHQ recorded Nov 5, 2026	501-1,000	1,186 contacts →
	Exact match “Scorpion is the leader in helping local businesses succeed by focusing on what truly matters-driving revenue.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	Centerfield	Exact match	Los Angeles, CA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,168 contacts →
	Exact match “Super-powered customer acquisition.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	Mediaocean	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,111 contacts →
	Exact match “Mediaocean is powering the future of the advertising ecosystem with technology that empowers brands and agencies to deliver impactful omnichannel marketing experiences.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “adtech and martech companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 10,147 adtech and martech companies worldwide

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Adtech and martech companies worldwide at a glance

As of Nov 5, 2026

32.1%Verified-email coverage

22.9Average contacts per company

1-10Median size (employees)

2.5%Largest-city concentration · London

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

5,119

11-50

3,379

51-200

1,103

201-500

298

501-1,000

102

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for adtech and martech companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “adtech and martech companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 74,602 professional contacts with verified work emails across the full matched dataset. 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 November 5, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Adtech and martech companies by location

108 lists · largest first

Every Adtech and martech companies 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 SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “adtech and martech companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many adtech and martech companies are there worldwide?

RevenueBase identified 10,147 company matches for adtech and martech companies worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Hubspot tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most adtech and martech companies?

The United States leads with 2,506 companies, followed by India (1,050) and the United Kingdom (464). Every adtech and martech companies list by country and city is linked on this page.

Which city has the most adtech and martech companies?

London leads with 249 company records, followed by New York (248) and Bangalore (150).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 74,602 professional contacts with verified work emails tracked across these 10,147 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 5, 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 SmartSearch, 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.