In a context where data collaboration becomes a cornerstone of responsible advertising, First-id and Decentriq are taking a new strategic step alongside the Hachette Livre group.
By orchestrating a series of activations via clean rooms with Prisma Media, RMC BFM Ads, and Reworld Media, Hachette Livre has demonstrated that it is now possible to generate actionable and high-performing insights—even in a cookieless environment—while respecting the highest standards of privacy (GDPR, encryption, consent…).
Discover in this press release how:
- 🧬 Lookalike audiences were generated and activated without third-party cookies
- 🎯 Matching rates reached up to 43%
- 📈 These activations resulted in 2.4x more visits to Hachette’s websites, with a peak of 3.7x on Safari
- 🔍 The setup paves the way for next-generation attribution measurement thanks to the clean room
👉 A concrete, innovative case at the intersection of media performance and privacy.
We are proud to have been featured and mentioned by the following media outlets:
📰 Exchangewire