Company lists · Data refreshed September 2026

Top 25 SEO agencies based in Spain

RevenueBase identified 2,094 company matches for SEO agencies associated with Spain as of September 2026 and tracks 10,548 professional contacts across them, including 1,092 with verified work emails and 245 with mobile numbers. Madrid is the largest hub.

This list covers company matches for SEO agencies associated with Spain, 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 September 6, 2026.

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 Sep 6, 2026 How this list was built
2,094Companies
10,548Contacts tracked
1,092Verified emails
245Mobile numbers
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The 25 largest SEO agencies based in Spain

Ranked by team size
Top 25 of 2,094 company matches for SEO agencies based in Spain, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchBarcelona, SpainHQ recorded Sep 6, 202651-200108 contacts →

Exact match

“En nuestra agencia SEO en Barcelona somos unos apasionados del posicionamiento web.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
2Exact matchMadrid, SpainHQ recorded Sep 6, 202651-20085 contacts →

Exact match

“Royal Comunicación es una empresa dedicada al Marketing online teniendo como fin principal optimizar y rentabilizar los recursos de las empresas en la red.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
3Exact matchVillamayor De Armuña, SpainHQ recorded Sep 6, 202651-20083 contacts →

Exact match

“SÚMATE es una agencia de marketing online orientada a resultados medibles.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
4Exact matchAlhama De Murcia, SpainHQ recorded Sep 6, 202651-20071 contacts →

Exact match

“Since 2012, at Interamplify, we have become strategic partners for brands and companies seeking to expand digitally on a global scale.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
5Exact matchValencia Valencia, SpainHQ recorded Sep 6, 202611-5055 contacts →

Exact match

“Necesitas mejorar el rendimiento de tu negocio online?”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
6Exact matchBarcelona, SpainHQ recorded Sep 6, 202611-5049 contacts →

Exact match

“Con más de 20 años de experiencia, ayudamos a las marcas a convertir el SEO en un canal de captación escalable, medible y alineado con sus objetivos de negocio.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
7Exact matchMadrid, SpainHQ recorded Sep 6, 202651-20047 contacts →

Exact match

“Comunicare es una empresa especializada en Marketing Online y Desarrollo Web para empresas.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
8Exact matchVigo, SpainHQ recorded Sep 6, 202611-5039 contacts →

Exact match

“VISUAL PUBLINET Somos una agencia especializada en comunicación en Internet desde 1996.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
9Exact matchValencia, SpainHQ recorded Sep 6, 202611-5038 contacts →

Exact match

“Esta empresa se creó para dar respuesta a una necesidad cada vez más demandada: el posicionamiento web.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
10Exact matchBarcelona, SpainHQ recorded Sep 6, 202611-5038 contacts →

Exact match

“Keyweo is a digital marketing agency founded in 2018 and based in Barcelona.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
11Exact matchArmilla, SpainHQ recorded Sep 6, 202611-5037 contacts →

Exact match

“IDENTO - Diseño y Programación Web - Marketing Online, Posicionamiento en Buscadores, SEM, SEO, Redes Sociales, SMM, SMO, Email Marketing, Analítica Web, Google Analytics - Socio…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
12Exact matchMadrid, SpainHQ recorded Sep 6, 202651-20035 contacts →

Exact match

“We are a specialized multi-channel Digital Marketing and Media Agency.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
13Exact matchSant Joan D'alacant, SpainHQ recorded Sep 6, 202611-5031 contacts →

Exact match

“Since 2001, we've been boosting the online discoverability of leading international companies and media outlets.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
14Exact matchAlcoy, SpainHQ recorded Sep 6, 202611-5031 contacts →

Exact match

“de páginas web accesibles.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
15Exact matchMadrid, SpainHQ recorded Sep 6, 202611-5031 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
16Exact matchAlcoy, SpainHQ recorded Sep 6, 202651-20031 contacts →

Exact match

“Appyweb: Your Digital Partner to Drive Online Growth.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
17Exact matchMadrid, SpainHQ recorded Sep 6, 202611-5030 contacts →

Exact match

“Agencia de marketing digital especialista en captación para el sector educativo y en ventas online para ecommerce.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
18Exact matchBarcelona, SpainHQ recorded Sep 6, 202611-5030 contacts →

Exact match

“Online Marketing Agency leader in the management and optimization of SEM campaigns.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
19Exact matchBarcelona, SpainHQ recorded Sep 6, 20261-1029 contacts →

Exact match

“GMK Unlimited, Agencia Interactiva Con más de 10 años de experiencia en marketing y comunicación, nos hemos especializado en ámbitos del marketing online, la programación, el…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
20Exact matchGirona, SpainHQ recorded Sep 6, 202611-5027 contacts →

Exact match

“Agencia de SEO y Google ADS especializada en eCommerce”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
21Exact matchMadrid, SpainHQ recorded Sep 6, 202611-5026 contacts →

Exact match

“A Brand New Way Góbalo es una agencia creativa digital donde interpretamos la realidad de forma estratégica.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
22Exact matchBarcelona, SpainHQ recorded Sep 6, 202611-5025 contacts →

Exact match

“Tu negocio necesita visibilidad?”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
23Exact matchMataró, SpainHQ recorded Sep 6, 20261-1025 contacts →

Exact match

“Joan Boluda, Consultor de Marketing OnlineEspecializado en Posicionamiento Natural (SEO), Pago Por Clic (PPC), Redes Sociales (SMO) y Email Marketing.Si tienes claro tu plan de…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
24Exact matchMadrid, SpainHQ recorded Sep 6, 202611-5024 contacts →

Exact match

“Sh Marketing está formado por un grupo de consultores de marketing digital con amplia experiencia en Search Marketing.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
25Exact matchMadrid, SpainHQ recorded Sep 6, 202611-5023 contacts →

Exact match

“Convertix is an International SEO & Performance Marketing Agency with offices in Madrid and Milan serving clients in 20+ markets and 10+ languages.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase

Showing 25 of 2,094 SEO agencies based in Spain

See the full list, filter by size, metro and specialty, and access 1,092 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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SEO agencies based in Spain at a glance

As of Sep 6, 2026
10.4%Verified-email coverage
2.3%Mobile-number coverage
5.0Average contacts per company
1-10Median size (employees)
19.1%Largest-city concentration · Madrid
Sep 6, 2026Page data refreshed

Companies by employee count

1-10
1,807
11-50
258
51-200
18
501-1,000
1
1,001-5,000
2

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

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.
What qualifies
Company records associated with Spain whose business descriptions match “SEO agencies” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 1,092 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 September 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.

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 “SEO agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many SEO agencies are there based in Spain?

RevenueBase identified 2,094 company matches for SEO agencies associated with Spain as of September 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?

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

Which city has the most SEO agencies?

Madrid leads with 401 company records, followed by Barcelona (274) and Valencia (98).

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 1,092 professional contacts with verified work emails tracked across these 2,094 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 September 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.