Seedtag

www.seedtag.com ↗ ·Madrid ·Series C

Seedtag is a Madrid-founded adtech company that runs a privacy-first, cookieless contextual advertising platform, using AI and machine learning to read the content, emotion and intent of a page or video and place ads accordingly across display, online video and CTV. Founded in 2014 by two ex-Googlers, it has grown to roughly 700+ employees across 17 countries with offices including Madrid, New York, London, Paris and Mexico City, and now markets itself as a 'neuro-contextual advertising' company. It is one of Spain's best-known adtech scale-ups, having raised over €250M from Advent International in 2022 (a €270M deal that included secondary purchases), after earlier rounds led by Oakley Capital and Adara Ventures; it also acquired JustEggs Digital in 2024.

Founded
2014
Founders
3
Total funds raised
€291M
Rounds
5
Investors
5
Last round
Jul 2022
SectorsAdtech, Advertising Technology, Contextual Advertising, Artificial Intelligence, Marketing Technology, CTV Start-up MapMedia & Gaming › Marketing & advertising tech

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Founders

Albert Nieto Riera
Co-Founder & Co-CEO
Also at Masia →
Jorge Poyatos
Co-Founder & Co-CEO
Pablo López Torres
Co-Founder & former CTO

Global models 5

Taboola
United States · www.taboola.com ↗
An AI-driven platform that reads a page's context to place ads inside publisher content, and is paid by advertisers for placements across a publisher network, as Seedtag is.
~$280MComparable
Outbrain
United States · www.outbrain.com ↗
Places ads that match the page's content across premium publishers and takes a share of advertiser spend, a close match to Seedtag's contextual model.
~$194MComparable
GumGum
United States · gumgum.com ↗
The closest match: it uses computer vision and NLP to read page, image and video context, then sells cookieless contextual display, video and CTV ads to brands.
~$60MComparable
SilverPush
Uses AI to read the context of video content and sells cookieless contextual video ads to brands and agencies.
~$15MComparable
Illuma Technology
United Kingdom · illuma.tech ↗
Sells privacy-first, cookieless contextual targeting to advertisers, using AI to read live page content the way Seedtag does.
~$10MComparable

In the same niche 12 others

See all in the Start-ups Map →

Notes: Most funded first

Investors 5

Open as list →

Funding rounds 5

DateRoundAmountLead
PublishedArticle
2026-11-01 Talky Labs, YK-Robotics y Ball Inn captan financiación ↗
2026-10-29 Talky capta 1,5 millones para automatizar finanzas con IA ↗
Capital-Riesgo.es
2026-10-29
2026-10-22 Barcelona's Masia closes €18M debut fund, opens founder hub ↗
Dealroom News
2026-10-22
2026-04-22 Seedtag Revolutionises Media Planning & Activation with the Launch of NeuroX ↗
ExchangeWire
2026-04-22
2026-03-11 Seedtag Launches Liz Agent, the Agentic AI Platform for Faster, Smarter Media Strategy ↗
ExchangeWire
2026-03-11
2025-11-19 Seedtag Releases First-of-Its-Kind Neuroscience Study Redefining Human-Centered Advertising Effectiveness ↗
Seedtag (press release)
2025-11-19
2025-07-08 Seedtag Appoints Brian Gleason as New Chief Executive Officer ↗
ExchangeWire
2025-07-08
2025-07-02 Seedtag Outperforms Market with 38% YoY Growth in UK, Accelerating European Momentum and Strategic Investments Across the Region ↗
Seedtag (press release)
2025-07-02
2025-06-05 Seedtag unveils agentic AI for divining user interest, emotion, and intent in "neuro-contextual advertising" ↗
NewscastStudio
2025-06-05
2024-09-27 Seedtag Transforms Advertising With AI And Privacy Focus ↗
Oliver Wyman
2024-09-27
2024-08-16 Seedtag Acquires JustEggs for Contextual ANZ Market Entry ↗
Street Fight
2024-08-16
2024-06-03 Seedtag Acquires Beachfront Media for Contextual CTV Targeting ↗
VideoWeek
2024-06-03
2024-03-28 Seedtag launches Contextual TV ↗
Advanced Television
2024-03-28
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