OneTag
OneTag is a programmatic advertising exchange and smart curation platform that connects 2,000+ publishers and 5,000+ buyers through AI-driven media optimization, creative intelligence, and outcome-based decisioning for advertisers, brands, and DSP partners globally.
- Company typePrivate
- Founded2015
- HeadquartersLondon, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What OneTag does
OneTag (legal name: Onetag) is a London- and Pisa-headquartered programmatic advertising technology company that operates a global exchange and smart curation platform connecting premium publishers with advertisers and demand-side platforms (DSPs). The platform is built around three integrated product pillars: Quality Media, which delivers real-time placement-level media optimization enriched with proprietary data signals; Creative Intelligence, an immersive high-impact creative stack with AI-driven emotional-response and engagement metrics; and the Outcomes AI Engine, which applies custom AI optimization loops to connect sell-side decisioning intelligence with business outcomes and claims 20-50% benchmark improvement. These products are delivered through a self-serve curation portal (curation.onetag.com) and an exchange platform (platform.onetag.com), with the company reporting 2,000+ global premium publishers, 5,000+ buyers, 35+ DSP partners, and 200+ top brands on the network.
Revenue is generated through transaction fees on programmatic media buys and subscription-style self-serve platform services. The company runs a hybrid go-to-market combining self-serve PLG with direct enterprise field sales targeting top brands, agencies, and strategic accounts, complemented by 35+ DSP channel integrations. Private equity sponsor Wise Equity backed OneTag's March 2026 acquisition of Milan-based Aryel, an immersive and interactive advertising technology company serving luxury, beauty, and fashion brands; the combined entity is projected to generate aggregate net revenues exceeding €60 million and EBITDA above €30 million by 2025. Operations span three offices — Pisa (global headquarters), Milan (engineering and Aryel integration hub), and London (European commercial headquarters) — with the recognized timely-payment track record (OAREX H1 2025 top programmatic payor) functioning as a publisher-acquisition lever.
OneTag firmographics
Firmographics- Name
- OneTag
- Legal name
- Onetag
- Website
- https://onetag.net
- Company type
- Private
- Founded year
- 2015
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- OneTag is a programmatic advertising exchange and smart curation platform that connects 2,000+ publishers and 5,000+ buyers through AI-driven media optimization, creative intelligence, and outcome-based decisioning for advertisers, brands, and DSP partners globally.
- Ownership category
- akta.pro rank
OneTag industry classification
Industry- Product category
- Programmatic Advertising Platform
- NAICS
- Media Buying Agencies (54183)
- SIC
- Services-Advertising (7310)
- akta.pro primary industry
- Performance Marketing Automation & Bid Management Services (MPAAACAM)
- akta.pro secondary industry
- Multi-Dealer Platforms (Multi-Asset) (FSAFAEAF)
Keywords
Where OneTag is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices3 records
Markets served
OneTag business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Operations, Marketing or Sales, Infrastructure
Revenue model
- Programmatic Advertising Marketplace: Operating as a global exchange and smart curation platform connecting publishers and advertisers for programmatic advertising transactions. Revenue generated through transaction fees on media buys and curation services.
- Self-Serve Platform Services: AI-driven self-serve platform providing programmatic advertising solutions to premium publishers and advertisers, contributing to projected aggregate net revenues exceeding €60 million by 2025
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Enterprise programmatic advertising solutions |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels3 records
OneTag product offering
Product offeringCore offering
OneTag operates a programmatic advertising exchange and smart curation platform that connects premium publishers with advertisers globally. Its core offering combines real-time, placement-level media quality optimization, immersive AI-driven creative formats, and an Outcomes AI Engine that customizes optimization loops per advertiser, delivering transaction-fee and subscription-based revenue across its self-serve Curation Platform and Exchange Platform.
Product overview
Onetag is a programmatic advertising platform consisting of multiple integrated products. The core offering includes three main pillars: Quality Media (real-time media optimization and data enrichment), Creative Intelligence (immersive high-impact ad formats with AI-powered engagement tracking), and the Outcomes AI Engine (AI decisioning that connects sell-side intelligence with business outcomes, delivering 20-50% benchmark improvement). These are delivered through two platforms: the Curation Platform for advertisers and the Exchange Platform for publishers. The company connects over 2,000 publishers with 5,000+ buyers and 35+ DSP partners globally.
Differentiator
Problem solved
Functional benefit
Products and services
- Quality Media Real-time media optimization and performance enhancement service that improves media quality for the unique needs of every DSP seat and enriches impressions with proprietary and market-leading industry data signals; designed for advertisers and DSP partners seeking premium programmatic inventory.
- Creative Intelligence Suite of immersive, high-impact creative experiences for the open web with AI insights for emotional responses, real attention and engagement metrics that make creative a live optimization input; targeted at brand advertisers (notably luxury, beauty and fashion) seeking higher CTR and engagement.
- Outcomes AI Engine
- Curation Platform
- Exchange Platform
Quantifiable outcome
- 20-50% benchmark outcomes improvement through custom AI optimization loops
- +1 more outcomes
Companies that use OneTag
Customer profileNamed customers1 record
Segments3 records
Ideal customer profiles2 records
OneTag technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability2 records
Feature4 records
OneTag partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- AryelcoreItalian ad tech company specializing in immersive and interactive advertising experiences for luxury, beauty, and fashion brands. Acquired to integrate creative technology, quality media, data, and AI decisioning into unified self-serve platform.
Scale indicators7 records
Recent moves5 records
Expansion highlights5 records
OneTag competitors and assessment
Company assessmentDirect peers
- Magnite: Largest independent sell-side programmatic exchange, formed from the Rubicon Project and Telaria merger. Competes head-to-head with OneTag in supply-path optimization, curation, and CTV/open-web inventory access across EMEA and globally.
- PubMatic: Independent SSP operating a global programmatic exchange and curation stack serving both publishers and advertisers. Directly comparable technology footprint, customer type, and outcome-based optimization narrative.
- Index Exchange: Independent programmatic exchange with strong publisher-direct integrations and curation capabilities. Direct competitor in the supply-side exchange and smart curation category OneTag operates in.
- OpenX: Independent supply-side platform operating a programmatic exchange with curation and audience solutions. Closely comparable business model, technology stack, and dual publisher/buyer monetization logic.
- Equativ (formerly Smart AdServer): Independent ad tech platform combining an ad server, SSP, and curation tools for publishers and advertisers in EMEA. Comparable European roots, exchange model, and full-stack publisher monetization positioning.
- Criteo: Public European ad tech company operating a programmatic exchange and commerce media platform. Overlaps with OneTag on retargeting, supply-side curation, and outcome-based buying across EMEA budgets.
Broad incumbents
- The Trade Desk: Largest independent demand-side platform buying on OneTag's exchange and competing curation stacks. Indirect overlap through DSP-side optimization and outcome-based buying, though on the buy rather than sell side.
- FreeWheel (Comcast): TV-first ad management and SSP platform within Comcast, overlapping with OneTag on premium video/CTV inventory and curation. Wider portfolio but adjacent technology category.
- Xandr (Microsoft): Microsoft-owned programmatic exchange and curation platform, formerly AT&T's ad business. Competes on supply curation and marketplace dynamics, anchored in a much larger enterprise parent.
Emerging players
- LiveRamp: Data connectivity and identity resolution provider enabling addressability across the open web. Comparable layer of the programmatic stack whose signals underwrite outcomes-based buying like OneTag's Outcomes AI Engine.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks5 records
Key highlights7 records
Customer concentration
OneTag social profiles
Digital presenceOneTag financial estimates
Financial estimateRevenue estimate
Valuation estimate
OneTag leadership team
Management profileNumber of profiles
Profiles1 record
OneTag subsidiaries and ownership
Company hierarchySubsidiaries1 record
OneTag funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
OneTag M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about OneTag
What does OneTag do?
OneTag operates a programmatic advertising exchange and smart curation platform that connects premium publishers with advertisers globally. Its core offering combines real-time, placement-level media quality optimization, immersive AI-driven creative formats, and an Outcomes AI Engine that customizes optimization loops per advertiser, delivering transaction-fee and subscription-based revenue across its self-serve Curation Platform and Exchange Platform.
Is OneTag a public or private company?
OneTag is a private company. It is classified as private equity controlled and is currently operating.
When was OneTag founded?
OneTag was founded in 2015. It employs 11 to 50 people.
Where is OneTag based?
OneTag is headquartered in London, United Kingdom, in the Europe region.
How does OneTag make money?
Two revenue lines are on record. Programmatic Advertising Marketplace is the primary driver. The others are self-Serve Platform Services.
Who are OneTag's main competitors?
Direct peers on record are Magnite, PubMatic, Index Exchange, OpenX, Equativ (formerly Smart AdServer) and Criteo. Broad incumbents are The Trade Desk, FreeWheel (Comcast) and Xandr (Microsoft). LiveRamp is listed as an emerging player.
Does OneTag have an API?
No public API is recorded for OneTag.
What industry is OneTag in?
OneTag's product category is Programmatic Advertising Platform. Its primary akta.pro industry code is MPAAACAM, Performance Marketing Automation & Bid Management Services, with a secondary code of FSAFAEAF, Multi-Dealer Platforms (Multi-Asset). Its NAICS code is 54183 and its SIC code is 7310.