Company lists · Data refreshed September 2026
Top 25 Ad tech agencies based in Spain
RevenueBase identified 290 ad tech agencies headquartered in Spain as of September 2026 and tracks 4,411 professional contacts across them, including 1,046 with verified work emails. Madrid is the largest hub.
This list covers ad tech agencies headquartered in Spain, 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 19, 2026.
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.
The 25 largest ad tech agencies based in Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 268 contacts → | ||||
Indirect evidence “Kimia is an online marketing technology group providing innovative solutions across the digital marketing ecosystem.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 258 contacts → | ||||
Indirect evidence “Building impactful technology solutions - EXTE was created by three of Europe’s largest AdTech companies-SunMedia- The largest adtech in Spain and Latin America.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 236 contacts → | ||||
Indirect evidence “Smadex is a Mobile Growth Platform that powers performance, direct response, and brand advertising campaigns across in-app, CTV, and mobile web.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 134 contacts → | ||||
Indirect evidence “Somos After, una agencia de publicidad -por ponernos una etiqueta- que mezcla estrategia, creatividad y cultura digital.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 109 contacts → | ||||
Indirect evidence “Vidoomy is a company focused on Video advertising.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 106 contacts → | ||||
Indirect evidence “About ExoClick As part of EXOGROUP, ExoClick was founded by current CEO Benjamin Fonzé in 2006 and based in Barcelona, Spain.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 102 contacts → | ||||
Indirect evidence “Havas Digital is the umbrella holding company that manages all Havas Media's interactive companies: Media Contacts and Lattitud, global interactive media networks; iGlue, new…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 100 contacts → | ||||
Indirect evidence “Adglow collaborates with advertisers and agencies around the world to upscale their social advertising campaigns.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 96 contacts → | ||||
Indirect evidence “Arkeero is a Digital Marketing company, specialized in performance marketing.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 94 contacts → | ||||
Indirect evidence “Zenith es The ROI Agency.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 76 contacts → | ||||
Indirect evidence “mediasmart is an omnichannel programmatic advertising platform trusted by leading advertisers, agencies and trading desks globally.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 58 contacts → | ||||
Indirect evidence “DoubleYou is a communication company aimed at the creation and development of projects and campaigns in the current framework, shaped by media digitalization.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 57 contacts → | ||||
Indirect evidence “Tappx is a fast-growth AdTech company that delivers state-of-the-art digital advertising solutions for multiple platforms including mobile, OTT/CTV and desktop.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 51 contacts → | ||||
Indirect evidence “Dentsu X, la agencia de mejor performance del mercado, conecta a través de los medios, los contenidos, los datos y la tecnología.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 35 contacts → | ||||
Indirect evidence “EXOGROUP is a set of companies offering a range of services within the digital business landscape.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 34 contacts → | ||||
Indirect evidence “Somos una agencia de publicidad digital que entiende que el éxito de las marcas no solo está en el corto plazo, por eso unimos efectividad y creatividad para que tu negocio crezca…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 33 contacts → | ||||
Indirect evidence “We’re building more than just tools → we’re building a space for marketers who care about data, creativity, and doing things differently Birch helps ambitious marketing teams…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 32 contacts → | ||||
Indirect evidence “EU & LATAM Profile).” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 32 contacts → | ||||
Indirect evidence “Media ADgo is an Online Marketing agency specialized in providing Digital Marketing Solutions 360 for our advertisers and publishers.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 31 contacts → | ||||
Indirect evidence “Nuestro Objetivo como agencia de publicidad online es potenciar el negocio de nuestros clientes mediante la implementación de estrategias de marketing online para alcanzar sus…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 30 contacts → | ||||
Indirect evidence “Online Marketing Agency leader in the management and optimization of SEM campaigns.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 29 contacts → | ||||
Indirect evidence “Facing the new reality of E-commerce for both Publishers and Advertisers, We at Widitrade brings you the platform with all the technology to provide you solutions:*Publishers…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 28 contacts → | ||||
Indirect evidence “Optima is an advertising technology company providing revenue optimization and predictability to publishers of all sizes.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 28 contacts → | ||||
Indirect evidence “At Adkomo, we specialize in mobile advertising and lead generation, helping businesses thrive in the fast-paced world of digital advertising.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 27 contacts → | ||||
Indirect evidence “Maverick Media was founded as a leading programmatic advertising company.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
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: ad tech 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 ad tech agencies.
- Partial evidence
- Its own public description names part of ad tech agencies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name ad tech 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 290 ad tech agencies based in Spain
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Ad tech agencies based in Spain at a glance
As of Sep 19, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 290 companies.
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 ad tech 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.
- What qualifies
- Companies headquartered in Spain whose own description of what they do matches “ad tech 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 ad tech 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 ad tech agencies, and records with no verified work email. Companies headquartered outside Spain are excluded even when they keep an office there.
- 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, 1,046 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 19, 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.
Ad tech agencies by metro
- Ad tech agencies in Madrid130
- Ad tech agencies in Barcelona72
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 ad tech 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 ad tech agencies are there based in Spain?
RevenueBase identified 290 ad tech agencies headquartered in Spain 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?
Kimia Group, headquartered in Madrid, tops this list with the largest team on record.
Which city has the most ad tech agencies?
Madrid leads with 130 headquartered companies, followed by Barcelona (72) and Valencia (7).
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 1,046 verified decision-maker contacts tracked across these 290 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 19, 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.
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