M
Mantle8
Natural hydrogen exploration using proprietary geophysical and geochemical technologies for sustainable energy solutions
About Mantle8
Mantle8 specializes in the exploration and detection of naturally occurring hydrogen reservoirs using advanced geophysical and geochemical technologies. The company operates in the energy sector, focusing on sustainable and clean energy solutions by leveraging its proprietary technology to create predictive models for hydrogen detection. Mantle8's business model involves the assessment and exploration of hydrogen sources, targeting clients in the energy industry who are seeking alternative and sustainable energy options. The company generates revenue through partnerships and funding from ventures such as Kiko Ventures and Breakthrough Energy Ventures. By combining geology, geophysics, and geochemistry, Mantle8 aims to lead the energy revolution by uncovering the hidden potential of natural hydrogen. The company serves a global market, providing scalable solutions for hydrogen exploration and contributing to a cleaner energy future. Keywords: hydrogen, exploration, geophysics, geochemistry, energy, sustainability, reservoirs, technology, geology, detection
Source: Dealroom company dataAt a glance
- Status
- Operational
- Founded
- 2019
- Headquarters
- Sassenage, France
- Employees
- 32
- Open positions
- 13
- Dealroom signal
- 91.7/100
- Industry
- Energy
- Sub-industry
- Clean Energy
- Sector
- Energy, Mining Technologies, Hydrogen, Sustainable Development Goals, Climate Tech, Energy and Greentech, Observatoire Deeptech, White Hydrogen, observatoire greentech, observatoire industrial tech, out of stealth
- Business model
- Manufacturing
- Client focus
- b2b
Latest news
Press, funding announcements and product moves mentioning Mantle8.
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| SERIES A✓Equity / VC | May 2026 | $34M | $136M | Breakthrough Energy Ventures · Sandwater · Calderion · Bpifrance | ↗ |
| GRANT✓Other financing | Mar 2026 | $2.3M | — | European Commission | ↗ |
Growth signals
Latest recorded traffic for Mantle8 is 7.2K monthly website visits, up 278.9% over the last three months. Mantle8's team grew 357.1% over the past year.
Open positions
Similar companies
Company identity and context are open; selected comparison metrics preview what is available on the platform.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Seed3 investors entered at this stage
Breakthrough Energy Ventures
Kiko Ventures
European Commission
Series A6 investors entered at this stage
Viridien
Sandwater- CACalderion
Bpifrance
IP Group
Wind
Other known investors1 additional known investor
- MFMarieke Flament
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about Mantle8 on X, ranked by likes and reposts, corporate channels excluded.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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