
Harness the power of your
first-party data
What is First-id?
Today, you already have more than 50% of your visitors who you can’t identify. Tomorrow, nearly 90% will be invisible!
First-id enables you to identify and recognize all your consented users on all your sites, from all devices and browsers, without emails or third-party cookies.

Advertisers
- Unify and enrich my 1st party data
- To identify, qualify and precisely personalize my interactions with users
- No email
Publishers / Media
- Unify and enrich my 1st party data
- To increase the volume and value of my audiences tenfold
- No email or third-party cookies
Agencies
- Optimize targeting and audience planning
- To increase the reach and impact of my media campaigns
- No third-party cookies
Adtech
- Maximize the interoperability of my tools
- For more precise, personalized and efficient service
- In compliance with RGPD

Whether you are a
media, e-retailer or advertiser
First-id helps you meet your challenges:
Data
- Identify
- Reconciling
- Qualify
- Exchange
Activation
- Target (Re-targeting)
- Address (Reach)
- Mastering repetition (capping frequency)
- Measuring performance
How does First-id help you respond to these challenges?
Deterministic
Precise, persistent identifiers based on a combination of strong signals
Powerful
Cross-domain, cross-device, cross-browser compatible
Interoperable
For use in all your marketing and advertising tools
Partner Sovereignty
The partner controls the creation and transfer of its first-party cookie
GDPR Compliance
User consent, opt-out management and anonymous ID
- Read more
+ 250 partner media sites and advertisers
Latest News
Jacadi revolutionizes its e-commerce strategy: +43% conversions with First-id!
As the disappearance of third-party cookies reshapes the digital marketing landscape, advertisers must rethink their retargeting strategies. Jacadi, a premium…
🇧🇪 IPM Advertising Adopts First-ID!
IPM Advertising Adopts First-ID: A Revolution in Advertising Identification in Belgium In a rapidly evolving digital landscape, where the end…
First-id at PMAddressability25: Towards a Borderless Advertising Ecosystem
On January 30, David Folgueira, CEO & co-founder of First-id, and Javier Plana, First-id’s collaborator in Spain, spoke at the…
First-id rewarded at the ⭐ Ratecard Stars 2024 ⭐
On November 14, 2024 the 4th edition of the ⭐ Ratecard Stars 2024 ⭐ was held at the orangerie d'Auteuil…