10 Oct 2026 · TrustList Editorial
Only 26 of 84 funding announcements named a single customer
Our count of 84 October items finds 73 named a lead investor, 63 a stage and 6 a company-stated valuation, while none of the 48 customer or…
6 of 20 advertising companies ranked on evidence in the Q4 2026 edition.
Between them, the 20 advertising companies on this page cover SEO (3), internet (3), legal (3) and advertising (2). They also list work in Portugal. 20 of them have written a profile you can read before you get in touch.
TrustList ranking
Q4 2026 edition
6 of 20 advertising companies ranked on evidence held on 9 October 2026: client reviews, vetting, awards and facts each business states on its own website, which we read and date. Nobody pays to be placed.
Positions are fixed for the quarter; the next edition is due in January 2027.

Herraiz Soto & Co is an independent creative and advertising agency in Barcelona.
Why #1: Based in Barcelona, Spain · Founded 1997, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.

3DE Media is a digital marketing consultancy in Barcelona that designs and builds websites and web applications and then works to grow their traffic.
Why #2: Based in Barcelona, Spain · In business 25+ years, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.

Let's be SMART is a communications and marketing agency based in Barcelona.
Why #3: Based in Barcelona, Spain · In business 16+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.

Digital Agency Barcelona is a web and marketing studio based in Barcelona that takes client projects from the first strategy through launch and ongoing upkeep.
Why #4 (shared): Based in Barcelona, Spain · In business 10+ years, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.

Dalton Digital is a Spanish agency that works only on native advertising and says it was the first in Spain to do so.
Why #4 (shared): Based in Barcelona, Spain · Founded 2016, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.

Internet
Ideatik is a communications and events agency in Barcelona. It says it has spent more than ten years making event management, graphic design, digital communication, advertising and…
Why #4 (shared): Based in Barcelona, Spain · In business 10+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.

4funkies is a creative studio that handles branding, graphic design, communication and web work as a single team rather than separate departments.
On record: Based in Poblenou, Barcelona, Spain

ARCA Diversidad Creativa is an advertising agency based in Barcelona, Spain.
On record: Based in Barcelona, Spain

Advertising · Creative
BCNcontent is a Barcelona copywriting agency that produces marketing text in native English.
On record: Based in Barcelona, Spain

Bipolar Artist is a creative agency that designs and builds digital experiences for brands, with teams in Madrid, London, Dubai and Barcelona.
On record: Office in Barcelona

SEO · Internet
Blackstone Barcelona is a creative agency working from Barcelona and Madrid, blending physical and digital media in campaigns for brands.
On record: Based in Barcelona, with a presence in Madrid

SEO · Advertising
Content marketing agency producing SEO research, technical content and email automation for data-driven, high-growth companies

Brand Culture Company, known as BrandCulture, is a strategic branding agency with a presence in Los Angeles, Atlanta and Barcelona.
On record: Office in Barcelona

SEO · Internet · Also in Valencia and Madrid
E-Finance Click is an online marketing agency. It plans strategies, builds action plans and then carries them out, with the aim of making the internet a source of business for its…

Felices Agency is a communications and public relations consultancy in Barcelona. Its website is in Spanish and English.
On record: Based in Barcelona, Spain

Legal · Also in Portugal
Glocally Media Agency plans and buys local media for brands, using geolocation data and knowledge of each city to decide where and when adverts should run.
On record: Office in Barcelona

On record: Based in Barcelona, Spain

Legal · Also in Portugal
Inspira is an advertising and graphic design agency in Barcelona, Spain, working under the name Inspira Publicidad.
On record: Based in Barcelona, Spain

Legal · Also in Debe
Kina Comunicación is a communications, marketing and public relations agency in Barcelona.
On record: Based in Barcelona, Spain

Public relations and communications agency with offices in Madrid and Barcelona, working with technology and consumer brands
On record: Based in Madrid and Barcelona, Spain
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10 Oct 2026 · TrustList Editorial
Our count of 84 October items finds 73 named a lead investor, 63 a stage and 6 a company-stated valuation, while none of the 48 customer or…
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