What ONETAG LIMITED does

Onetag is a private, AI-powered programmatic advertising platform founded in 2015 in Pisa, Italy, and backed by private equity sponsor Wise Equity since a 9-figure investment in September 2022. The company operates a global exchange connecting 2,000+ premium publishers and 5,000+ advertisers/agencies across 35+ DSP integrations, with offices in Pisa (HQ), Milan, London, and New York serving EMEA, North America, and LATAM markets.

The platform's core product stack consists of the Onetag Global Exchange for real-time auction processing, the Onetag Smart Curation Platform for self-service deal creation and activation, the Outcomes AI Engine for placement-level media quality optimization before every bid, and Onetag Dynamo for zero-tech-fee business outcomes optimization. AI capabilities span optimization, predictive analytics, process automation, generative/creative intelligence, and recommendation engines across multiple modalities (structured data, text, video, multimodal). The March 2026 acquisition of Aryel added immersive and interactive creative formats and real attention/engagement metrics that now feed into the optimization loop across 50,000+ placements.

Onetag serves three primary segments — publishers (yield optimization, ads.txt integration, payment reliability), advertisers (business outcomes optimization, creative intelligence, AI-driven media quality filtering), and agencies (DSP-agnostic curation, campaign management) — through a combined enterprise direct-sales motion and channel-partner distribution through major agency holding companies (Dentsu, Publicis, Omnicom, GroupM, Havas). Revenue is generated via transaction fees on the exchange plus publisher monetization services. The 2026 launch of Dynamo introduces a freemium, zero-tech-fee pricing model that signals a strategic shift toward volume-based economics. Onetag is recognized as an OAREX Top Programmatic Payor for H1 2025 and is IAB Europe TCF compliant.

Name

ONETAG LIMITED

Legal name

Onetag Limited

Website

https://onetag.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

51–100 employees

Short description

Onetag is a private, AI-powered programmatic advertising platform connecting 2,000+ premium publishers with 5,000+ advertisers and agencies across 35+ DSP integrations. It serves publishers with yield optimization, advertisers with outcomes-driven media buying, and agencies with curation tools, operating globally from Italy, the UK, and the US.

Ownership category

akta.pro rank

Product category

Programmatic Advertising Technology

NAICS

Other Services Related to Advertising (541890)

SIC

Services-Advertising (7310)

akta.pro primary industry

Ad Networks & Exchanges (Programmatic RTB) (BPAMALAA)

akta.pro secondary industry

Performance Marketing Automation & Bid Management Services (MPAAACAM)

Keywords

• Programmatic advertising platform
• Ad curation technology
• Supply-side monetization
• AI-driven ad exchange
• Header bidding integrations

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Platform/Technology Fees: Onetag charges technology fees for access to its programmatic platform including the Global Exchange, Smart Curation Platform, and AI optimization services. The Dynamo product offers zero tech fee model.
2. DSP Services: Demand-side platform services for advertisers and agencies to manage programmatic campaigns. Services include campaign optimization, media quality enhancement, and business outcomes optimization.
3. Publisher Monetization Services: Publisher-facing services enabling monetization of advertising inventory through unique demand from 200+ global brands. Charges based on ad impression volume and performance.

Pricing tiers

Go-to-market motion3 records

Distribution channels6 records

Marketing channels7 records

Core offering

Onetag operates a programmatic advertising value-exchange platform connecting 2,000+ premium publishers with 5,000+ advertisers across 35+ DSP integrations. Its core products are the Onetag Global Exchange (real-time ad exchange) and the Onetag Smart Curation Platform (self-service deal creation and activation), augmented by an Outcomes AI Engine for business-outcomes optimization, Creative Intelligence for immersive/attention-driven ad formats, DealCurate for semantic contextual targeting, and Dynamo for zero-tech-fee outcomes optimization.

Product overview

Onetag operates as a next-generation value exchange platform for programmatic advertising, combining quality media, creative intelligence, and AI-driven decisioning in a single ecosystem. The core offering consists of the Onetag Global Exchange (direct connection to 2,000+ premium publishers) integrated with the Onetag Smart Curation Platform (self-service deal creation and activation). This foundation is enhanced by Creative Intelligence powered by Aryel's immersive ad formats (50,000+ placements), the Outcomes AI Engine for campaign optimization toward business objectives, and Onetag Dynamo for zero-fee outcomes optimization delivering 20-50% performance improvements. DealCurate provides semantic contextual targeting at scale via 100 million data points. All components are delivered through one self-service solution removing operational complexity.

Differentiator

Problem solved

Functional benefit

Brands

• Aryel: Immersive and interactive advertising experiences company acquired by Onetag in March 2026
• Onetag Dynamo
• Onetag Smart Curation Platform
• Outcomes AI Engine
• Onetag Global Exchange

Products and services

• Onetag Global Exchange Next-generation, real-time ad exchange directly connected to 2,000+ premium publishers and integrated with all major demand platforms (35+ DSP partners). Processes programmatic auctions with AI-powered sell-side decisioning that optimises media quality before every bid at placement level. Built for buy-side value and outcomes on the open internet.
• Onetag Smart Curation Platform Vertically integrated, self-service platform for creating, activating and managing curated Deal IDs. Provides free access to sell-side deal creation with powerful curation levers and precise targeting, integrated with the Global Exchange and delivering enriched impressions with proprietary and market-leading industry data signals.
• Creative Intelligence (Aryel integration) Immersive, high-impact creative ad formats (acquired from Aryel) natively integrated into the Onetag Exchange across 50,000+ placements. Captures AI insights on emotional responses, attention and engagement so creative becomes a live optimisation input for media decisioning.
• Onetag Dynamo Business-outcomes optimisation solution combining the Global Exchange, Smart Curation Platform and custom AI algorithmic optimisation. Delivers 20-50% benchmark improvements across CPA, CPC and CPL (with a verified 25% CPA reduction for the Tomorrow client) at zero tech fee. DSP-agnostic and activates dynamic optimisation of unique business outcome metrics per Deal ID.
• Outcomes AI Engine AI-driven decisioning engine that optimises campaigns toward concrete business objectives (consideration, engagement, conversions) rather than surface-level metrics. Powers custom AI optimisation loops delivering 20-50% benchmark outcomes improvement across CPA, CPC and CPL with no additional fee.
• DealCurate Semantic engine accessing 100 million data points for granular contextual targeting at scale. Enables high operational efficiency with complete control over supply-side deal creation, activatable directly in all major DSPs; integrated via Onetag's partnership with Multilocal.
• Aryel Italian ad tech company specialising in immersive and interactive advertising experiences, acquired by Onetag in March 2026. Its creative formats are now natively integrated into the Onetag Exchange across 50,000+ premium publisher placements and inform real-time media decisioning.

Quantifiable outcome

• 20-50% benchmark outcomes improvement across CPA, CPC, and CPL metrics
• +5 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration8 records

AI capability9 records

Feature5 records

Partnerships

Three partnerships are on record, tiered core and minor.

• AryelcoreStrategic or Co-development Partner · 2 March 2026Onetag acquired Aryel, an Italian ad tech company specializing in immersive and interactive advertising experiences. The acquisition brings together quality media, creative technology, data, and AI-driven decisioning into a single platform. Aryel's formats are natively integrated into Onetag's Exchange across 50,000+ placements, with creative performance data directly informing real-time media decisioning.
• The Alliance of Independent AgenciesminorGTM or Marketing Partner · 5 January 2026Partnership with The Alliance of Independent Agencies to provide members access to Onetag's programmatic platform and value exchange capabilities.
• CedaraminorStrategic or Co-development PartnerCarbon Intelligence Platform that verified Onetag's sustainability credentials, confirming 94% carbon efficiency improvement over industry benchmark and 0.27g CO2e per impression metrics.

Scale indicators12 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Criteo: Commerce media platform with SSP capabilities (Commerce Grid, former MediaGrid). Comparable ad tech operating at larger scale, with Onetag's new VP of Product hired from Criteo signaling direct talent competition.
• Google Authorized Buyers / AdX: Dominant programmatic ad exchange operated by Google as part of its broader ads business. Operates as a broad incumbent with overlapping exchange capabilities, though Onetag differentiates via DSP-agnostic curation and zero tech fee.
• Amazon Publisher Services / TAM: Amazon's Transparent Ad Marketplace and publisher services compete on supply-side programmatic with broader Amazon ecosystem reach. Onetag integrates with Amazon TAM, but faces it as competition for premium publisher inventory.

Direct peers

• Index Exchange: Global ad exchange and header bidding wrapper provider. Direct competitor in the programmatic exchange market with overlapping publisher integrations and DSP partnerships.
• Magnite: Largest independent sell-side advertising platform focused on programmatic CTV, video, and display. Direct competitor in the programmatic exchange and SSP space, serving similar publisher and advertiser clients with overlapping DSP integrations.
• Sovrn: Publisher-focused SSP and programmatic monetization platform with exchange capabilities. Competes with Onetag on supply-side publisher services and demand integration.
• Equativ: Independent ad tech platform (formerly Smart AdServer) operating an SSP and programmatic exchange. Comparable as a mid-sized European-headquartered exchange competing with Onetag for publisher and advertiser share.
• OpenX: Independent programmatic ad exchange and SSP serving publishers and agencies globally. Competes directly with Onetag on supply-path optimization and curated marketplace offerings.
• PubMatic: Independent SSP and programmatic ad exchange serving premium publishers and advertisers globally. Competes directly with Onetag's Global Exchange on supply-side inventory monetization and programmatic curation.

Emerging players

• TripleLift: Programmatic advertising platform specializing in native and premium formats. Comparable as a programmatic-focused ad tech player pursuing differentiated creative formats and curation, similar to Onetag's Aryel integration strategy.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/onetag

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles17 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ONETAG LIMITED