Company lists · Data verified August 2026

Top 25 Enterprise SEO agencies based in Spain

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,391 companies tracked

There are 1,391 enterprise SEO agencies headquartered in Spain (RevenueBase, August 2026). RevenueBase tracks 5,742 professional contacts across them, including 845 with verified work emails and 170 with mobile numbers. Madrid is the largest hub.

This list covers enterprise SEO agencies headquartered in Spain, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

1,391Companies

5,742Contacts tracked

845Verified emails

170Mobile numbers

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The 25 largest enterprise SEO agencies based in Spain

Ranked by team size

Top 25 of 1,391 enterprise SEO agencies based in Spain, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Bigseo	Barcelona	51-200	110	17
2	Digital Menta	n/a	51-200	99	27
3	Royal Comunicación	Barcelona	51-200	84	11
4	internet.republica	Madrid	51-200	73	32
5	Interamplify	Alhama De Murcia	51-200	73	19
6	Viva Conversion	Valencia Valencia	11-50	59	9
7	seocom.agency	Barcelona	11-50	45	8
8	Improove	Madrid	51-200	43	6
9	Geotelecom	Burgos	51-200	41	5
10	Keyweo	Barcelona	11-50	39	10
11	Acceseo	Alcoy	11-50	31	17
12	Jevnet	Barcelona	11-50	30	10
13	Visibilidadon	Girona	11-50	26	20
14	Eteria	Almeria	11-50	22	4
15	IP Marketing	Girona	11-50	19	2
16	Marketingpublicidad	Madrid	11-50	18	1
17	Visionclick SL	Barcelona	11-50	17	6
18	Ecoeureka	Madrid	11-50	17	2
19	SEO Coaching	Barcelona	11-50	15	2
20	Baobab Marketing	Ibi	11-50	15	1
21	Think On Marketing	Bilbao	11-50	14	10
22	Estudio34	Barcelona	11-50	13	7
23	Filmac	Valencia	11-50	13	2
24	Sedigital	Madrid	11-50	12	1
25	Mr. Landon The Agency Partner	n/a	11-50	10	4

Showing 25 of 1,391 enterprise SEO agencies based in Spain

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 845 reachable decision-makers.

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Enterprise SEO agencies based in Spain at a glance

As of Aug 28, 2026

1-10Median size (employees)

MadridLargest hub · 272 HQs

170Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

1,177

11-50

188

51-200

201-500

Enterprise SEO agencies by metro

Metro	Companies
Enterprise SEO agencies in Madrid	272
Enterprise SEO agencies in Barcelona	174
Enterprise SEO agencies in Valencia	69
Enterprise SEO agencies in Malaga	39
Enterprise SEO agencies in Alicante	28
Enterprise SEO agencies in Sevilla	28
Enterprise SEO agencies in Bilbao	26

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “enterprise SEO agencies”, with match quality audited by blind human judging, and headquartered in Spain.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many enterprise SEO agencies are there based in Spain?

There are 1,391 enterprise SEO agencies headquartered in Spain as of August 2026 (RevenueBase).

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 enterprise SEO agencies?

Madrid leads with 272 headquartered companies, followed by Barcelona (174) and Valencia (69).

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 845 verified decision-maker contacts tracked across these 1,391 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.