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02 December 2025

Havas Expands Data Expertise with Acquisition of Unnest

Unnest Team Photo 0058 Scaled

Havas today announces the acquisition of Unnest, a leading French data consulting and engineering firm with deep end-to-end expertise in designing, building, and deploying data platforms. This strategic addition strengthens Havas Media Network’s global data, technology, and analytics arm, CSA, reinforcing Havas’ commitment to harnessing technology and data as part of its Converged.AI strategy to help brands successfully navigate transformation challenges.

Founded in 2021 by Nicolas Chollet and Mehdi Moreau, Unnest has established itself as a respected player thanks to its specialist expertise in technology infrastructures, its ability to deliver high–value-added projects, and its implementation of best-in-class tech solutions. With teams of experts specialized in Data & Cloud Engineering (Google Cloud Platform, Azure, Snowflake, Amazon Cloud, etc) and AI, Unnest strengthens the group’s Business Science practice and significantly boosts its ability to deploy data strategies at scale. Unnest serves an impressive portfolio of top-tier clients spanning retail, travel, beauty, automotive, and luxury industries.

This acquisition will help foster strong synergies with CSA Data Consulting, DBi, and TED Consulting by integrating Unnest’s specialist expertise at the heart of the group’s Business Science solutions, creating a combined team of 120 data experts in France.

Supported by CSA’s global network, these solutions will be rolled out in France and internationally across companies from all sectors.

Unnest is joining the Havas group while retaining its agility and technological DNA, benefiting from the group’s strategic partnerships and its globally recognized clients.

We are thrilled to welcome Nicolas Chollet, Mehdi Moreau, and the entire Unnest team to the Havas family. Their technological expertise will be a valuable addition to the acceleration of our Converged.AI strategy. They will help drive the adoption of AI solutions across our client base, addressing strategic and operational challenges while maintaining the highest standards of excellence.
Yannick Bolloré
Chairman and CEO, Havas
In a rapidly growing data and AI landscape, joining Havas represents a unique opportunity to accelerate our growth and leverage our technological expertise in support of a global vision. We are eager to contribute to the creation of innovative solutions for brands.
Nicolas Chollet
Co-founder of Unnest

For more information, please contact:

 

Charlotte Rambaud, Global Chief Communications Officer

+33 6 64 67 66 27

charlotte.rambaud@havas.com

 

Delphine Maillet, Head of Investor Relations

+33 6 80 36 18 12

delphine.maillet@havas.com

 

Kristin Calmes, Global Senior Communications Officer

+33 6 08 40 76 27

kristin.calmes@havas.com