Company lists · Data refreshed September 2026
Top 25 Business to business advertising agencies based in Spain
RevenueBase identified 4,400 business to business advertising agencies headquartered in Spain as of September 2026 and tracks 29,626 professional contacts across them, including 3,356 with verified work emails and 574 with mobile numbers. Madrid is the largest hub.
This list covers business to business advertising 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 23, 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 business to business advertising agencies based in Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,520 contacts → | ||||
Indirect evidence “Together, we enhance and protect the value of your business.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 2 | 259 contacts → | ||||
Indirect evidence “LOLA MullenLowe is a creative agency based in Madrid, built from world-class international talent.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 3 | 227 contacts → | ||||
Indirect evidence “Somos especialistas en marketing comercial y promocional, con más de 18 años de experiencia en el sector.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 4 | 205 contacts → | ||||
Indirect evidence “evercom is a creative communications and marketing agency that, founded in 1996, is one of the first independent creative communications and marketing agencies in the Spanish…” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 5 | 154 contacts → | ||||
Indirect evidence “iProspect suma ahora más innovación, data, tecnología y talento para construir su propuesta de valor diferencial junto con las características que definieron durante toda su…” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 6 | 149 contacts → | ||||
Indirect evidence “OMD es una de las agencias líderes en España y se ha destacado por ser la más eficaz e innovadora de la industria española, contando con todos los recursos para dar un servicio…” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 7 | 137 contacts → | ||||
Strong evidence “Manifiesto is an advertising agency based in Barcelona and Madrid and with 10 years of experience in the sector.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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 23, 2026Thanks. The Data Team will review it. | |||||
| 9 | 117 contacts → | ||||
Indirect evidence “En 014 Media somos el grupo especializado en la comercialización de soportes publicitarios en entornos altamente segmentados y audiencias cualitativas.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 10 | 114 contacts → | ||||
Indirect evidence “MIO Group es un ecosistema integrado de talento especialista en estrategia de marketing, creación de activos digitales y activación de medios.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 11 | 113 contacts → | ||||
Indirect evidence “Ayudamos a las marcas a crear y ejecutar sus estrategias de marketing a través del contenido y de la publicidad para generar resultados de negocio.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 12 | 112 contacts → | ||||
Indirect evidence “McCann Worldgroup, parte de Interpublic Group (NYSE: IPG), es una red global líder de soluciones de marketing con más de 20 empleados unidos en más de 100 países por una sola…” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 13 | 106 contacts → | ||||
Indirect evidence “HMG es una agencia que pertenece a MIO Group, grupo empresarial de servicios integrales de Marketing y Publicidad presidido por Yago Arbeloa, y con capital cien por cien español.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 14 | 105 contacts → | ||||
Indirect evidence “Merging human with digital.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 15 | 102 contacts → | ||||
Indirect evidence “Somos una agencia de servicios plenos en la que trabajamos profesionales venidos de diferentes experiencias (creación, cuentas, planificación, interactivo.) Aplicamos la cercanía…” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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 23, 2026Thanks. The Data Team will review it. | |||||
| 17 | 97 contacts → | ||||
Indirect evidence “Hola, somos Tangoº.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 18 | 94 contacts → | ||||
Indirect evidence “Zenith es The ROI Agency.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 19 | 86 contacts → | ||||
Indirect evidence “Irismedia, es una agencia de medios, de servicios plenos, que van desde la Estrategia, planificación y compra de Medios, tanto de offline, como Online.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 20 | 84 contacts → | ||||
Indirect evidence “Everyone Plus es una agencia de publicidad productiva con una imprenta creativa.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 21 | 81 contacts → | ||||
Indirect evidence “Somos una agencia de marketing digital con un propósito: aprovechar los canales digitales para construir marcas que marcan y negocios que crecen.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 22 | 77 contacts → | ||||
Indirect evidence “Somos un equipo que crece y evoluciona con sus clientes, que se adapta a las nuevas tendencias para ofrecer, en todo momento a sus marcas, grandes dosis de creatividad y el mix de…” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 23 | 77 contacts → | ||||
Indirect evidence “Antevenio es una empresa que opera en el sector de la publicidad y el marketing online.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 24 | 77 contacts → | ||||
Indirect evidence “Somos IMAGINA, la Agencia experta en Marketing Digital y Redes Sociales.” Source: RevenueBase Database · checked Sep 23, 2026Thanks. The Data Team will review it. | |||||
| 25 | 75 contacts → | ||||
Indirect evidence “Nos gusta escuchar para ayudar y compartir nuestra experiencia para AVANZAR, Iniciamos nuestra andadura en 1954, bajo la denominación de Talleres MARVA, con una actitud valiente…” Source: RevenueBase Database · checked Sep 23, 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: business to business advertising 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 business to business advertising agencies.
- Partial evidence
- Its own public description names part of business to business advertising agencies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name business to business advertising 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 4,400 business to business advertising agencies based in Spain
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Business to business advertising agencies based in Spain at a glance
As of Sep 23, 2026Companies by employee count
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 25.0dCompany record updated
Median 88.0dHow 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 business to business advertising 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 “business to business advertising 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 business to business advertising 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 business to business advertising 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, 3,356 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 23, 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.
Business to business advertising agencies by metro
- Business to business advertising agencies in Madrid1087
- Business to business advertising agencies in Barcelona626
- Business to business advertising agencies in Valencia159
- Business to business advertising agencies in Sevilla91
- Business to business advertising agencies in Bilbao61
- Business to business advertising agencies in Alicante59
- Business to business advertising agencies in Vigo50
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 business to business advertising 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 business to business advertising agencies are there based in Spain?
RevenueBase identified 4,400 business to business advertising 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?
LLYC, headquartered in Madrid, tops this list with the largest team on record.
Which city has the most business to business advertising agencies?
Madrid leads with 1087 headquartered companies, followed by Barcelona (626) and Valencia (159).
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 3,356 verified decision-maker contacts tracked across these 4,400 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 23, 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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