Mantle8 raises €2.1M

Startup.eu Editorial

Mar 10, 2026

Non-dilutive €2.06M grant from the EU Just Transition Fund supporting a €4.84M R&D programme through 2028. Mantle8 previously closed a €3.4M seed round in 2025, bringing total funding to ~€5.46M (private + public).

Investors:
- European Union Just Transition Fund (via FEDER/FSE+/JTF programme, Auvergne-Rhône-Alpes region)
- Undisclosed Private Investors

Deal Snapshot

Amount Raised

2,060,000 EUR

Funding Round

Investment Type

Equity

Date

March 10, 2026

Use of Funds:

strengthen technology infrastructure
scale core technology platform
further develop HOREX pilot system
construct APoGeH geochemistry laboratory
upgrade GeoLogix for automation and higher-resolution imaging
develop Simul8 multiphysics modelling engine
recruit specialised talent including PhD researchers
conduct industrial techno-economic studies
anchor activities in Grenoble and Auvergne-Rhône-Alpes region

About Mantle8

Mantle8 is a natural hydrogen exploration company that develops proprietary subsurface modelling and exploration technologies, including HOREX, a multiphysics platform that produces 4D images of active underground hydrogen systems. Its exploration framework identifies reservoirs where an active hydrogen-generating source, continuous replenishment, and a sufficiently sealed reservoir converge.

Grenoble, France

Read Company Profile

Funding Rounds

Amount	Date	Round
€2.06 M	Mar, 2026	Unknown Current	Viewing
€31 M	May, 2026	series-a	View

Source: https://techfundingnews.com/french-h2-explorer-mantle8-bags-e2-06m-eu-grant-to-scale-discovery-tech/

Frequently Asked Questions

How much did Mantle8 raise in its ?

Mantle8 raised $2,060,000 EUR in its .

When did Mantle8 raise its ?

Mantle8 raised its on 2026-03-10.

Who invested in Mantle8's ?

The investors in Mantle8's are: European Union Just Transition Fund (via FEDER/FSE+/JTF programme, Auvergne-Rhône-Alpes region), Undisclosed Private Investors.

How will Mantle8 use the funds from its ?

Mantle8 plans to use the funds for: strengthen technology infrastructure, scale core technology platform, further develop HOREX pilot system, construct APoGeH geochemistry laboratory, upgrade GeoLogix for automation and higher-resolution imaging, develop Simul8 multiphysics modelling engine, recruit specialised talent including PhD researchers, conduct industrial techno-economic studies, anchor activities in Grenoble and Auvergne-Rhône-Alpes region.

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Participating Investors 2

European Union Just Transition Fund (via FEDER/FSE+/JTF programme, Auvergne-Rhône-Alpes region)

Lead

Undisclosed Private Investors

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