ID5
Privacy-first identity infrastructure for cookieless digital advertising.
Available information varies by company and source.
Profile record updated:
Company facts
- Official name
- ID5 Technology Ltd
- Entity type
- COMPANY
- Founded
- 2017
- Headquarters
- 8 Devonshire Square, 6th Floor, London EC2M 4YJ, United Kingdom.
- Company size
- 50–200
- Market role
- AdTech Vendor
- Official website
- id5.io
What ID5 does
ID5 operates a B2B identity infrastructure model for the advertising ecosystem. It builds proprietary identity resolution technology and data assets that connect fragmented signals across devices and environments, enabling publishers and platforms to increase monetisation while helping buyers improve targeting and measurement. Value is created through ecosystem integrations, graph enrichment, interoperability and identity-linked data services that become more useful as adoption broadens across supply and demand partners.
Category differentiation
ID5 is not a consumer identity app or login provider for end users. It is an AdTech infrastructure company focused on privacy-first identity, graph enrichment and interoperability for digital advertising.
Strategic context
AI-supported assessment from the existing company research; distinguish interpretation from sourced facts.
ID5 is a private AdTech company that provides identity infrastructure for digital advertising in cookieless, privacy-first environments. Its core products include a universal identifier, an identity graph, and interoperability tooling used by publishers, SSPs, DSPs, data platforms, advertisers and agencies to improve addressability, match rates, bid enrichment, audience activation and measurement across web, in-app, audio and CTV environments. The company generates value by making previously unaddressable inventory more monetisable and by helping buy-side and sell-side participants improve campaign efficiency. Its commercial model appears hybrid: broad ecosystem adoption is encouraged through free or low-friction deployment of its ID product, while revenue is generated through paid graph access, data assets, enrichment, interoperability and commercial agreements tied to performance and identity services. The 2025 acquisition of TrueData expanded its US footprint and strengthened its identity datasets.
Company news briefing
Briefing updated:
Publicis Groupe’s acquisition of LiveRamp has accelerated identity consolidation, prompting the industry to rethink third-party infrastructure and positioning ID5 as a key independent alternative. Meanwhile, Apple's iOS 27 release has temporarily added ID5 alongside other vendors to a browser blocklist affecting Safari inventory access, though solutions are being investigated. ID5 continues to navigate these evolving addressability challenges by promoting open cloud-native architectures that counter proprietary holding company graphs.
Business model & monetisation
ID5 uses a hybrid monetisation strategy. The ID5 ID is positioned as a low-friction or free adoption layer to drive ecosystem penetration among publishers and platforms. Revenue is then captured through paid access to the ID5 Graph, identity enrichment, data assets such as TrueData, audience activation, interoperability services and commercial agreements with ecosystem partners that benefit from higher CPMs, better fill rates, improved match rates and stronger campaign performance.
- Identity graph access and enrichment
- SaaS / data licensing
- Universal ID ecosystem monetisation
- Commercial partner agreements / take-rate
- Data assets including acquired identity datasets
- Data licensing
- Interoperability and partner integration services
- Enterprise commercial agreements
Products & capabilities
No products with linked sources are available in this view.
Programmatic stack & registry data
Registry entries and observed technical data do not establish certification, legal compliance or actual usage.
ID5 Technology SAS
IAB vendor record: 131
- Cookies declared
- Yes
- Non-cookie access declared
- Yes
- Declared purpose IDs
- 1, 3, 5, 10
- Declared feature IDs
- 1, 2, 3
- Declared special purpose IDs
- 1, 3
Products & market categories
Subsidiaries & acquisitions
- TrueData
Privacy-first identity graph and audience data for digital advertising.
Recent recorded signals
Dates refer to the source publication. Older entries are historical context, not evidence of a new event.
No sufficiently sourced and dated signals are available for this view.
Explore company relationships
Questions about ID5
What is ID5?
ID5 is a B2B AdTech company that provides privacy-first identity infrastructure, including a universal ID and identity graph for digital advertising.
Who uses ID5?
Its users are publishers, SSPs, DSPs, data platforms, advertisers, agencies and other adtech partners that need cookieless identity and enrichment.
How does ID5 make money?
It monetises identity infrastructure through paid graph access, enrichment, data assets, partner agreements and related enterprise identity services.
Sources & coverage
This profile uses public, official and technically observable information. Missing information does not prove that a product or relationship does not exist. The list below does not imply that every profile statement has been verified.
15 publicly documented primary sources and citations linked across the market graph.
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