Company lists · Data refreshed November 2026

Top 25 Web ad companies worldwide

Name: Web ad companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 10,741 companies tracked

RevenueBase identified 10,741 company matches for web ad companies worldwide as of November 2026 and tracks 97,228 professional contacts across them, including 19,820 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for web ad 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 6, 2026. Country and city lists for web ad 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 6, 2026 How this list was built

10,741Companies

97,228Contacts tracked

19,820Verified emails

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The 25 largest web ad companies worldwide

Ranked by team size

Top 25 of 10,741 company matches for web ad companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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	Publicis Media	Exact match	London, United KingdomHQ recorded Nov 6, 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 6, 2026 · View company records in RevenueBase
2	Taboola	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,038 contacts →
	Exact match “Taboola empowers businesses to grow through performance advertising technology that goes beyond search and social and delivers measurable outcomes at scale.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Mediaocean	Exact match	New York, NY, United StatesHQ recorded Nov 6, 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 6, 2026 · View company records in RevenueBase
4	Seat Pagine Gialle SPA	Exact match	Assago Milanofiori Nord, ItalyHQ recorded Nov 6, 2026	1,001-5,000	1,001 contacts →
	Exact match “Dalla fusione con Seat Pagine Gialle nasce la nuova Italiaonline, la prima internet company italiana con i portali web più visitati, le mail più diffuse, le directory leader del…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Smartly	Exact match	Helsinki, FinlandHQ recorded Nov 6, 2026	501-1,000	922 contacts →
	Exact match “Smartly is the AI-powered advertising technology company transforming ad experiences for brands and their consumers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Logical Position	Exact match	Lake Oswego, NC, United StatesHQ recorded Nov 6, 2026	501-1,000	907 contacts →
	Exact match “Logical Position (LP) is an Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Adform	Exact match	Copenhagen, DenmarkHQ recorded Nov 6, 2026	501-1,000	881 contacts →
	Exact match “Adform is the most powerful and safe media buying platform in the world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Equativ	Exact match	Paris, FranceHQ recorded Nov 6, 2026	501-1,000	766 contacts →
	Exact match “Equativ is a leading independent media platform that empowers advertisers and publishers to achieve real outcomes across the entire digital ecosystem.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Cadastra	Exact match	São Paulo, BrazilHQ recorded Nov 6, 2026	501-1,000	744 contacts →
	Exact match “We are a global company that blends digital marketing services, consulting and technology.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Perion	Exact match	New York, United StatesHQ recorded Nov 6, 2026	501-1,000	685 contacts →
	Exact match “Perion is helping agencies, brands and retailers get better results with their marketing investments by providing advanced technology across all major digital channels.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Adsmurai	Exact match	Barcelona, United StatesHQ recorded Nov 6, 2026	201-500	507 contacts →
	Exact match “Adsmurai is a Growth-Tech Partner that helps brands transform marketing into a connected, measurable, and scalable growth system.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	BIG ADS	Exact match	Sydney, AustraliaHQ recorded Nov 6, 2026	n/a	413 contacts →
	Exact match “Big Ads has been providing digital ad-tech solutions for 3 years with great success thanks to the release of Buddy, an ad-tech platform which produces rich media creative tags to…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Localedge	Exact match	Buffalo, NY, United StatesHQ recorded Nov 6, 2026	501-1,000	401 contacts →
	Exact match “LocalEdge, a Hearst Media Services Company, offers a full suite of online advertising products and services for any size business and budget across the country.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Innity	Exact match	Petaling Jaya, MalaysiaHQ recorded Nov 6, 2026	201-500	393 contacts →
	Exact match “Innity is a leading online media company in Asia that offers best in class data-driven ad tech solutions that combines creative programmatic, ad-serving, data management, audience…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Yektanet یکتانت	Exact match	Tehran, IranHQ recorded Nov 6, 2026	201-500	391 contacts →
	Exact match “YEKTANET is the biggest and most advanced online advertising network in Iran serving over 25 million unique users with 5 billion impressions per month.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Arabyads	Exact match	Dubai, United Arab EmiratesHQ recorded Nov 6, 2026	201-500	382 contacts →
	Exact match “ArabyAds is an ad-tech company that empowers ecommerce marketing.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Vertoz	Exact match	Mumbai, IndiaHQ recorded Nov 6, 2026	201-500	351 contacts →
	Exact match “Vertoz (NSE: VERTOZ) is a global AI‑led digital advertising ecosystem, where strategies and execution are engineered for outcomes.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	advertising.com	Exact match	United StatesHQ recorded Nov 6, 2026	n/a	316 contacts →
	Exact match “Advertising.com brings advanced programmatic solutions to companies with large user bases, helping them unlock new revenue streams, strengthen user loyalty, and deliver high-value…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Adsterra	Exact match	Limassol, CyprusHQ recorded Nov 6, 2026	201-500	295 contacts →
	Exact match “Founded in 2013, Adsterra is now a global ad network with a unique Partner Care approach, trusted by 50K+ advertisers and publishers worldwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Sabaidea	Exact match	Tehran, IranHQ recorded Nov 6, 2026	201-500	288 contacts →
	Exact match “MISSION :"" To provide effective services based on engaging online products "" ABOUT: SabaIdea (SabaIedea.com), founded in 2004, is the provider of four of the most visited…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	EPA Digital	Exact match	Polanco, MexicoHQ recorded Nov 6, 2026	51-200	260 contacts →
	Exact match “We are a digital advertising agency specializing in Performance, Branding, Creativity and Consulting of CRO, Analytics and Google Ads.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Admedia	Exact match	Los Angeles, CA, United StatesHQ recorded Nov 6, 2026	201-500	258 contacts →
	Exact match “AdMedia helps brands and agencies drive measurable performance by connecting them with high-intent consumers across premium publisher environments, owned-and-operated properties…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Artox Media Digital Group Amdg	Exact match	Минск, BelarusHQ recorded Nov 6, 2026	51-200	254 contacts →
	Exact match “ARTOX media – digital-агентство с офисами в Москве и Минске, предоставляющее полный комплекс услуг для успешного развития и продвижения вашего бизнеса в интернете.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Accel Digital AD Operations	Exact match	Toronto, ON, United StatesHQ recorded Nov 6, 2026	201-500	253 contacts →
	Exact match “Welcome to Accel-Digital, a leading brand in the Marketing and Advertising industry that offers top-notch assistance with ad operations support services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	TSS Advertising	Exact match	Jeddah, Saudi ArabiaHQ recorded Nov 6, 2026	501-1,000	239 contacts →
	Exact match “Where innovation & simplicity fuse to bring effective offline/online advertising solutions that propel our partners closer to their marketing goals.” Recorded in the RevenueBase company graph · Nov 6, 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 “web ad 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 10,741 web ad companies worldwide

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Web ad companies worldwide at a glance

As of Nov 6, 2026

20.4%Verified-email coverage

9.1Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

6,835

11-50

2,919

51-200

650

201-500

175

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

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 web ad companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “web ad 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 19,820 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 6, 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.

Web ad companies by location

76 lists · largest first

Every Web ad 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 “web ad companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many web ad companies are there worldwide?

RevenueBase identified 10,741 company matches for web ad 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?

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

Which country has the most web ad companies?

The United States leads with 1,623 companies, followed by India (1,177) and Brazil (507). Every web ad companies list by country and city is linked on this page.

Which city has the most web ad companies?

London leads with 193 company records, followed by Sao Paulo (126) and New Delhi (117).

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 19,820 professional contacts with verified work emails tracked across these 10,741 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 6, 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.