Mantle8 raises $36.0M Series A (France, May 2026)

Mantle8 secured $36 million to commercialize a technology that finds naturally occurring hydrogen reservoirs deep beneath the Earth's surface - Energies Media

Mantle8 is a French startup focused on developing technology to locate naturally occurring hydrogen reservoirs deep beneath the Earth's surface. The company aims to commercialize its natural hydrogen exploration platform, tapping into a cleaner source of hydrogen that has been largely unexplored. Founded in 2018, Mantle8's mission is to bridge the gap in the exploration history and data infrastructure for natural hydrogen.

Mantle8 secured $36 million to commercialize a technology that finds naturally occurring hydrogen reservoirs deep beneath the Earth's surface  Energies Media