Mantle8 raises €31m to fund its advanced natural hydrogen exploration and drilling campaign, aiming to change the hydrogen sector's economics.
Amount Raised
€31 Million
Round Type
Funding Round
GrenobleEnergyOil And GasRenewable EnergyInvestors
Description
French start-up Mantle8 has raised €31m to fund what it calls the world’s most advanced natural hydrogen exploration and drilling campaign. The company aims to use its novel technology to find commercially viable underground H₂ reserves. This funding will support its ambitious plans in the hydrogen sector. Mantle8 believes its innovation will fundamentally alter the industry's economics.
Quick answer
Mantle8 raised €31 Million in a Funding Round round, dated May 13, 2026. Investors: Breakthrough Energy Ventures, Wind Capital, IP Group and Sandwater. Mantle8 is based in Grenoble, Auvergne Rhône Alpes, France.
- How much did Mantle8 raise?
- Mantle8 raised €31 Million in a Funding Round round on May 13, 2026.
- Who invested in Mantle8?
- Breakthrough Energy Ventures, Wind Capital, IP Group and Sandwater are named as investors in this round.
- What does Mantle8 do?
- Mantle8 is a Grenoble-based natural hydrogen exploration startup that utilizes innovative geological models and imaging technologies to detect optimal natural hydrogen locations.
- Where is Mantle8 based and how big is it?
- Mantle8 is based in Grenoble, Auvergne Rhône Alpes, France. Fundz records about 23 employees.
- Who are the decision-makers at Mantle8?
- Fundz holds 1 contact at Mantle8, including the Chief Commercial Officer (CCO). Names and contact details are shown to Fundz members.
Source: Fundz verified event record.
Who else raised in Energy and Oil And Gas around the same time
Companies in the same sectors as Mantle8 that raised within 45 days of this round, from Fundz verified event records.
- Vertoro raised $20M (Series B) on June 17, 2026.
- Critical Energy raised $22M (Seed) on June 17, 2026.
- Mantle Energy raised $5M (Seed) on June 16, 2026.
- Hygenco Green Energies raised $105M (Funding Round) on June 12, 2026.
- NORAM Electrolysis Systems raised $4.4M (Grant) on June 9, 2026.
- Companion.energy raised $9M (Seed) on June 8, 2026.
Who to call at Mantle8, and when
A new round usually means Mantle8 is about to hire and buy. The teams that reach out first get the meeting.
- An alert the day Mantle8 raises, hires an executive or expands, scored against what you sell
- The decision-makers there, with verified emails
- Who you already know at Mantle8, from your own LinkedIn network
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