Arkéon Energy is a Bidart-based cleantech startup that has created a “thésauthermie” system combining heat-pump technology with on-board thermal storage to cut carbon emissions from building heating. The device stores heat when power is cheapest or renewable and releases it on demand, positioning itself as an alternative to conventional heat pumps. Founded by Théo Granger and Colin Léti, the company has already installed several units in real-world settings. Target customers include both new construction projects and retrofit markets seeking lower energy bills and emissions. With new funds, Arkéon Energy aims to scale from pilot production to full industrial manufacturing of its equipment. The financing will also support continued R&D and commercial expansion. The article did not disclose revenue, user numbers, or other operating metrics.

Total raised

$5M

Funding rounds

2

Latest round

Equity

Latest activity

Oct 2025