Thésée Datacenter has announced plans to build a major new data center campus in Aubergenville (Yvelines), aiming to create one of the largest hosting sites in the Île-de-France region. The project, backed by an initial €60 million (US$ 70 million) investment within a broader €500 million (US$ 580 million) program, is designed to deliver a high-security, French-governed digital infrastructure for businesses and public-sector organizations.
In a press release Thésée Datacenter says each module will be built to meet the highest resilience standards, with an architecture capable of achieving Uptime Institute Tier IV certification, ensuring maximum availability with no planned service interruptions. The site will also incorporate advanced energy-efficiency measures.
Antoine Fournier, Président, Thésée Datacenter, said, “With this new campus, we respond to the growing demand for trusted and responsible infrastructures, capable of accommodating the most critical applications governed exclusively by French law.”
The new campus will expand the company’s existing footprint in Aubergenville, where Thésée has operated a Tier IV–certified, 3 MW data center since 2021. The extension will consist of several independent modules ranging from 5 to 10 MW each, deployed in phases to reach a target capacity of 50 MW. This modular approach is intended to accommodate rising demands for reliable, sovereign hosting in response to France’s accelerating digital transformation.
The company is targeting a power usage effectiveness (PUE) below 1.2 at full load and will deploy hybrid cooling systems combining air cooling and Direct Liquid Cooling to support high-density computing while reducing both carbon footprint and water consumption. The campus is also being designed to enable future waste-heat recovery.
Aligned with the Climate Neutral Data Center Pact and the Science Based Targets initiative, Thésée Datacenter aims to cut its Scope 1 and 2 emissions by 42% by 2030 and 90% by 2050. The Aubergenville campus seeks to combine energy performance, stringent security, and full compliance with French data-protection requirements.