First-id
Privacy-first deterministic identity infrastructure for cookieless advertising.
Available information varies by company and source.
Profile record updated:
Company facts
- Official name
- FIRST ID
- Entity type
- COMPANY
- Founded
- 2022
- Headquarters
- 5 Avenue Jean Monnet, 92130 Issy‑les‑Moulineaux, France
- Company size
- 10–49
- Market role
- AdTech Vendor
- Official website
- first-id.fr
What First-id does
First-id operates as a B2B identity and data activation software provider. It creates persistent pseudonymous identifiers for consenting users, then makes those identifiers available through platform and API integrations so customers can perform recognition, audience activation and measurement across channels. Value is created by improving addressability and attribution in environments where third-party cookies and email-based identity are constrained, while fitting into existing SSP, DSP, CDP and analytics workflows.
Category differentiation
First-id is a B2B identity infrastructure provider for advertising and first-party data activation, not a consumer identity app or a general login and SSO vendor. It is closer to cookieless advertising identity providers than to broad CRM or CMP software companies.
Strategic context
AI-supported assessment from the existing company research; distinguish interpretation from sourced facts.
First-id is a French identity infrastructure start-up that provides a privacy-first, deterministic identifier for consenting users across sites, devices and browsers. Its platform is designed to help publishers, advertisers, agencies and adtech platforms reconcile first-party data, activate audiences and support measurement, attribution and frequency management without relying on third-party cookies or email logins. The company monetises as a B2B software and API provider, integrating into existing adtech and martech stacks rather than operating as a media owner or agency. Its value proposition is based on GDPR-compliant pseudonymous identity, interoperability with programmatic and data platforms, and utility across web, in-app and CTV environments.
Business model & monetisation
The company primarily uses SaaS and API-based monetisation. Commercial mechanics are based on platform licensing, contracted software access, and usage-linked pricing tied to domains, identified users, integrations or activation and measurement volumes. Revenue may also expand through enterprise integration work tied to programmatic, CDP and attribution use cases.
- Identity platform licensing
- Software Subscription
- API and SDK usage
- Pay-per-Use
- Integration and activation-related commercial fees
- Service Fee
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.
First-id
IAB vendor record: 1178
- Cookies declared
- Yes
- Non-cookie access declared
- No
- Declared purpose IDs
- 1, 2, 3, 4, 7
- Declared feature IDs
- 1, 2, 3
- Declared special feature IDs
- 2
First-id bidder
IAB vendor record: 1489
- Cookies declared
- Yes
- Non-cookie access declared
- No
- Declared purpose IDs
- 1, 2, 3, 4, 7
- Declared feature IDs
- 1, 2, 3
- Indexed sellers.json entries
- 6 · first-id.fr
Products & market categories
Recent recorded signals
Dates refer to the source publication. Older entries are historical context, not evidence of a new event.
First-id annonce de nouveaux partenariats et intégrations
Recorded impact score: 3/5
First-id a publié plusieurs annonces récentes, notamment l'intégration native avec ArcSpan pour la monétisation des audiences, un partenariat avec Commanders Act pour le contrôle de l'identité marketing, et l'extension de l'offre CTV de Stamp. Ces annonces s'ajoutent à une série d'autres mises à jour de partenariats et d'intégrations.
ArcSpan accélère la monétisation des audiences des éditeurs français grâce à l’intégration native de First-id
Recorded impact score: 3.5/5
Les éditeurs équipés de First-id peuvent désormais créer, analyser, valoriser et activer leurs audiences dans ArcSpan AMS, sans développement supplémentaire.
ArcSpan Integrates First-id for Persistent Cookieless Publisher Identity
Identity · Recorded impact score: 3/5
ArcSpan, an AI-powered audience monetization platform for premium publishers, announced a native integration with First-id, a persistent, deterministic identity solution adopted by over 35,000 media and advertiser sites across 101 countries. This integration allows publishers using First-id to resolve audience signals within ArcSpan AMS without custom integrations. Publishers can build, analyze, and activate first-party audiences across direct, programmatic, and data collaboration channels. The combined solution addresses the challenge of fragmented user identities by providing a persistent identifier that works without third-party cookies or logins, enabling improved audience continuity, deduplicated reach, and enhanced monetization opportunities. The integration is live and available to existing customers, supporting ArcSpan's expansion across EMEA.
- ArcSpan announced a native integration with First-id on September 21, 2026.
- First-id is a persistent, deterministic identity solution adopted by more than 35,000 media and advertiser sites in 101 countries.
Commanders Act et First-id s’allient pour permettre aux marques de reprendre le contrôle de leur identité marketing.
Recorded impact score: 3.5/5
Grâce à l'intégration native de First-id au sein de sa plateforme, Commanders Act permet désormais aux marques d'orchestrer l'ensemble de…
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Questions about First-id
What is First-id?
First-id is a French B2B identity infrastructure platform that generates deterministic, pseudonymous identifiers for consenting users across devices and environments.
Who uses First-id?
Its users are publishers, advertisers, agencies and adtech platforms that need privacy-safe audience recognition, activation and measurement.
How does First-id make money?
It appears to monetise through software licensing and API-based identity infrastructure, potentially with usage-linked pricing tied to activation or identification volumes.
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.
19 publicly documented primary sources and citations linked across the market graph.
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