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Onetag

Programmatic ad exchange and AI media-quality optimization for ad buyers and open-web publishers

London, United KingdomFounded 2015onetag.comWebsite technologies

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Highlights

  • New on EvolcAdded 2026-10-28

About Onetag

Onetag builds programmatic advertising technology: a global ad exchange, real-time media-quality optimization for DSP buyers, immersive creative formats, and an AI decisioning engine aimed at campaign outcomes. The platform is offered as a self-service solution.

Customers are advertisers, agencies and buy-side teams on the demand side, and premium publishers on the supply side. The website cites over 2,000 premium publishers and 5,000 advertisers, and names Dentsu, Publicis, Omnicom, GroupM and Havas Italy among DSP clients.

Onetag was founded in 2015 and is registered in London. It acquired Aryel, an Italian ad tech company specialising in immersive and interactive advertising. The website lists 50,000+ high-impact placements and 35+ global DSP partners.

Product: Ad exchange and real-time optimization platform with creative formats and an AI decisioning engine for programmatic buying and selling.

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Website technologies

Older, unverified list. Detection dates and supporting evidence are not yet available.

  • Cloudflare
  • Elementor
  • Google Tag Manager
  • HubSpot
  • Usercentrics
  • WordPress
  • jQuery