Company lists · Data refreshed September 2026

Top 25 Marketplace SEO agencies based in Spain

Name: Marketplace SEO agencies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 1,042 companies tracked

RevenueBase identified 1,042 marketplace SEO agencies headquartered in Spain as of September 2026 and tracks 4,224 professional contacts across them, including 608 with verified work emails and 130 with mobile numbers. Madrid is the largest hub.

This list covers marketplace SEO 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

1,042Companies

4,224Contacts tracked

608Verified emails

130Mobile numbers

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The 25 largest marketplace SEO agencies based in Spain

Ranked by team size

Top 25 of 1,042 marketplace SEO agencies based in Spain, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names marketplace SEO agencies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	BigseoPartial evidence	Barcelona, SpainHQ checked Sep 5, 2026	51-200	108
	“En nuestra agencia SEO en Barcelona somos unos apasionados del posicionamiento web.” Source: company website · checked Sep 5, 2026
2	Royal ComunicaciónIndirect evidence	Madrid, SpainHQ checked Sep 5, 2026	51-200	85
	“Royal Comunicación es una empresa dedicada al Marketing online teniendo como fin principal optimizar y rentabilizar los recursos de las empresas en la red.” Source: company website · checked Sep 5, 2026
3	Viva ConversionIndirect evidence	Valencia Valencia, SpainHQ checked Sep 5, 2026	11-50	55
	“Necesitas mejorar el rendimiento de tu negocio online?” Source: company website · checked Sep 5, 2026
4	seocom.agencyPartial evidence	Barcelona, SpainHQ checked Sep 5, 2026	11-50	49
	“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.” Source: company website · checked Sep 5, 2026
5	GeotelecomIndirect evidence	Burgos, SpainHQ checked Sep 5, 2026	51-200	40
	“Hola!” Source: company website · checked Sep 5, 2026
6	agenciaseo.euIndirect evidence	Valencia, SpainHQ checked Sep 5, 2026	11-50	38
	“Esta empresa se creó para dar respuesta a una necesidad cada vez más demandada: el posicionamiento web.” Source: company website · checked Sep 5, 2026
7	KeyweoIndirect evidence	Barcelona, SpainHQ checked Sep 5, 2026	11-50	38
	“Keyweo is a digital marketing agency founded in 2018 and based in Barcelona.” Source: company website · checked Sep 5, 2026
8	Digital GroupIndirect evidence	Madrid, SpainHQ checked Sep 5, 2026	51-200	35
	“We are a specialized multi-channel Digital Marketing and Media Agency.” Source: company website · checked Sep 5, 2026
9	Marketalia Marketing OnlineIndirect evidence	Madrid, SpainHQ checked Sep 5, 2026	11-50	31
	“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: company website · checked Sep 5, 2026
10	MarketinhouseIndirect evidence	Madrid, SpainHQ checked Sep 5, 2026	11-50	30
	“Agencia de marketing digital especialista en captación para el sector educativo y en ventas online para ecommerce.” Source: company website · checked Sep 5, 2026
11	JevnetIndirect evidence	Barcelona, SpainHQ checked Sep 5, 2026	11-50	30
	“Online Marketing Agency leader in the management and optimization of SEM campaigns.” Source: company website · checked Sep 5, 2026
12	DOS Setenta Marketing & DesarrolloPartial evidence	Madrid, SpainHQ checked Sep 5, 2026	11-50	28
	“Online marketing services that we offer- Consultant in business development, marketing and digital transformation - Web page design worldwide - Organic positioning or SEO to…” Source: company website · checked Sep 5, 2026
13	VisibilidadonPartial evidence	Girona, SpainHQ checked Sep 5, 2026	11-50	27
	“Agencia de SEO y Google ADS especializada en eCommerce” Source: company website · checked Sep 5, 2026
14	boluda.comPartial evidence	Mataró, SpainHQ checked Sep 5, 2026	1-10	25
	“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…” Source: company website · checked Sep 5, 2026
15	ConvertixPartial evidence	Madrid, SpainHQ checked Sep 5, 2026	11-50	23
	“Convertix is an International SEO & Performance Marketing Agency with offices in Madrid and Milan serving clients in 20+ markets and 10+ languages.” Source: company website · checked Sep 5, 2026
16	NubeseoPartial evidence	Marbella, SpainHQ checked Sep 5, 2026	11-50	22
	“Posicionamiento Web SEO, Marketing Online y diseño de páginas web en Marbella.” Source: company website · checked Sep 5, 2026
17	EteriaPartial evidence	Gijón, SpainHQ checked Sep 5, 2026	11-50	22
	“Especialistas en marketing, publicidad, comuniciación, imagen corporativa, páginas Web, planificación de medios, campañas, social media, servicios SEM y SEO.” Source: company website · checked Sep 5, 2026
18	Liten LemonIndirect evidence	Madrid, SpainHQ checked Sep 5, 2026	1-10	21
	“Liten Lemon es una agencia de marketing digital ubicada en Madrid, España.” Source: company website · checked Sep 5, 2026
19	Sembi ComunicaciónPartial evidence	Bilbao, SpainHQ checked Sep 5, 2026	1-10	20
	“Sembi Communication is a Digital Marketing Agency experts in SEO (Search Engine Optimization),(Search Engine Marketing), Media Digital Content, Web Design, Community Manager &…” Source: company website · checked Sep 5, 2026
20	Comodoro MarketingIndirect evidence	Madrid, SpainHQ checked Sep 5, 2026	1-10	19
	“Comodoro Marketing es una agencia de marketing online en Madrid.” Source: company website · checked Sep 5, 2026
21	Yoseo MarketingIndirect evidence	Madrid, SpainHQ checked Sep 5, 2026	11-50	19
	“En YoSEOMarketing, somos la agencia líder en transformación digital, especializada en posicionamiento y resultados sostenibles.” Source: company website · checked Sep 5, 2026
22	The Wombat CompanyPartial evidence	Logroño, SpainHQ checked Sep 5, 2026	1-10	17
	“Una web, una campaña SEO, una campaña SEM o un community manager son conceptos inconexos que no te van a aportar los resultados que necesitas.” Source: company website · checked Sep 5, 2026
23	KdigitalIndirect evidence	Madrid, SpainHQ checked Sep 5, 2026	11-50	17
	“Trabajamos el Marketing 360º para ofrecer al cliente soluciones integrales para desarrollar su negocio.” Source: company website · checked Sep 5, 2026
24	Visionclick SLIndirect evidence	Malaga, SpainHQ checked Sep 5, 2026	11-50	17
	“Somos una agencia de marketing online y publicidad formada por un equipo de más de 20 profesionales.” Source: company website · checked Sep 5, 2026
25	EcoeurekaPartial evidence	Madrid, SpainHQ checked Sep 5, 2026	11-50	17
	“Agencia de Marketing Digital \| Hacemos SEO, SEM, Diseño Web, Redes Sociales, Vídeo Marketing, Email Marketing y Mantenimiento de Sistemas.” Source: company website · checked Sep 5, 2026

Showing 25 of 1,042 marketplace SEO agencies based in Spain

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Marketplace SEO agencies based in Spain at a glance

As of Sep 5, 2026

1-10Median size (employees)

MadridLargest hub · 211 HQs

130Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

905

11-50

126

51-200

501-1,000

Verified emails by last verification

0–30

565

31–60

61–90

90–180

180+

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 marketplace SEO agencies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Spain whose own description of what they do matches “marketplace SEO agencies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among marketplace SEO 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 an evidence 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, 608 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 5, 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.

Marketplace SEO agencies by metro

Marketplace SEO agencies in Madrid211
Marketplace SEO agencies in Barcelona119
Marketplace SEO agencies in Valencia52
Marketplace SEO agencies in Malaga33
Marketplace SEO agencies in Alicante25

Frequently asked

How many marketplace SEO agencies are there based in Spain?

RevenueBase identified 1,042 marketplace SEO 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?

Bigseo, headquartered in Barcelona, tops this list with the largest team on record.

Which city has the most marketplace SEO agencies?

Madrid leads with 211 headquartered companies, followed by Barcelona (119) and Valencia (52).

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 608 verified decision-maker contacts tracked across these 1,042 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 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.