Mantle8
Mantle8 is a French geoscience company that develops proprietary exploration technology — GeoLogix, HOREX, APoGeH and Simul8 — to identify, image and quantify underground natural hydrogen reservoirs for international energy, industrial and infrastructure players, anchored by its flagship Hydrogeco project in the French Pyrenees.
- Company typePrivate
- Founded2019
- HeadquartersSassenage, France
- Headcount1–10
- GTM typeB2B
- OfferingServices
What Mantle8 does
Mantle8 is a French geoscience company that develops proprietary exploration technology to identify, image and quantify underground natural hydrogen reservoirs. Its integrated stack combines GeoLogix®, a prospect-generation algorithm that screens the globe for the "Geological Trifecta" of iron-rich mantle source rock undergoing serpentinization, a sealed reservoir and continuous replenishment; HOREX®, a passive multiphysics imaging technology that produces 3D-over-time (4D) images of active hydrogen systems using shallow-buried sensors; APoGeH®, a quantification technology that uses rock, gas and liquid samples to size source-rock potential and gas composition; and Simul8, a multiphysics digital twin and techno-economic modelling engine. Field data from deployments are continuously fed back into the GeoLogix database, creating a growing proprietary dataset.
The company currently operates as a pre-revenue exploration business, funded to date by a €3.4M Seed round in 2025 led by Breakthrough Energy Ventures, a €2.06M EU Just Transition Fund grant in March 2026, and a €31M Series A in May 2026 led by Sandwater (with BEV, Bpifrance's Ecotechnologies 2 fund, IP Group, Wind Capital and Calderion), bringing cumulative funding to €37M. It serves future energy, industrial and infrastructure customers — national and international oil companies, major service providers and downstream offtakers — through enterprise partnerships and consortium-based deployment of its flagship Hydrogeco (Hydrogène géologique du Comminges) project in the French Pyrenees, carried out under the exclusive five-year Permis de Comminges covering 739 km² across 109 municipalities via wholly owned subsidiary G&OL SAS. Long-term operating partners include S³ (Smart Seismic Solutions) for a dedicated global seismic sensor fleet and CNRS for scientific collaboration.
Go-to-market is sales-led enterprise, led by a Chief Commercial Officer (Sylvain Marcant, appointed March 2026) targeting MENA, Europe and Asia, with parallel consortium-based deployment of Hydrogeco bundling research institutions, transport operators and industrial offtakers within a collaborative framework designed to bridge from exploration success to market-ready projects. Future revenue is expected to derive from commercial production of natural hydrogen via partnerships with drilling and reservoir exploitation operators, and potentially from subsurface energy-storage solutions, with the company publicly targeting production costs as low as €0.80/kg and the discovery of 10Mt of natural hydrogen by 2030.
Mantle8 firmographics
Firmographics- Name
- Mantle8
- Legal name
- Mantle8 SASU
- Website
- https://mantle8.com
- Company type
- Private
- Founded year
- 2019
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Mantle8 is a French geoscience company that develops proprietary exploration technology — GeoLogix, HOREX, APoGeH and Simul8 — to identify, image and quantify underground natural hydrogen reservoirs for international energy, industrial and infrastructure players, anchored by its flagship Hydrogeco project in the French Pyrenees.
- Ownership category
- akta.pro rank
Mantle8 industry classification
Industry- Product category
- Natural Hydrogen Exploration Services
- NAICS
- Geophysical Surveying and Mapping Services (54136), Geophysical Surveying and Mapping Services (541360)
- SIC
- Oil & Gas Field Exploration Services (1382)
- akta.pro primary industry
- Exploration & Prospecting (Geology, Geophysics, Seismic) (EUALAAAA)
- akta.pro secondary industry
- Seismic & Geoscience Services (Acquisition, Processing, Interpretation) (EUALABAK)
Keywords
Where Mantle8 is headquartered
LocationHeadquarters
- HQ city
- Sassenage
- HQ country
- France
- HQ region
- Europe
Offices3 records
Markets served
Mantle8 business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure
Revenue model
- Pre-revenue exploration stage: Mantle8 is currently a pre-revenue exploration company. Capital is raised via equity rounds (€3.4M Seed in 2025, €31M Series A in 2026) and non-dilutive grants (€2.06M EU Just Transition Fund). Future revenue is expected to come from commercial production of natural hydrogen via partnerships with drilling and reservoir exploitation partners, and potentially from hydrogen storage/subsurface energy solutions.
Go-to-market motion3 records
Distribution channels4 records
Mantle8 product offering
Product offeringCore offering
Mantle8 delivers geology-first natural hydrogen exploration services using a proprietary three-step technology stack — GeoLogix® (prospect generation), HOREX® (multiphysics passive imaging) and APoGeH® (source rock quantification) — supported by the Simul8 digital twin. The company identifies and evaluates underground hydrogen reservoirs for energy, industrial and infrastructure partners, currently operating the Hydrogeco flagship exploration and demonstration project in the French Pyrenees under the exclusive 739 km² Permis de Comminges.
Product overview
Mantle8 offers a unified platform-plus-modules architecture for natural hydrogen exploration, anchored by a three-step proprietary technology stack: GeoLogix® (prospect generation algorithm), HOREX® (multiphysics imaging technology) and APoGeH® (quantification technology), supported by Simul8 (multiphysics digital twin and modelling engine). These modules collectively implement the Geological Trifecta framework — locating where iron-rich mantle source rock, active serpentinization and sealed, replenished reservoirs converge — and are deployed in the field through flagship projects such as Hydrogeco in the French Pyrenees under the exclusive "Permis de Comminges". The offering is delivered as integrated exploration services (permitting, seismic acquisition via partners, drilling campaign management) rather than as a standalone software product.
Differentiator
Problem solved
Functional benefit
Brands
- Hydrogeco: Flagship natural hydrogen exploration and demonstration project in the French Pyrenees (Hydrogène géologique du Comminges), running under the Comminges Exclusive Exploration Permit awarded in April 2026 to G&OL SAS; mantained as a branded project entity with its own LinkedIn presence and a 739 km² footprint spanning 109 communes in Haute-Garonne and Hautes-Pyrénées.
Products and services
- GeoLogix® Prospect generation algorithm that scans the globe and determines where source rocks, active hydrogen generation and reservoirs coincide, identifying locations where Mantle8's Geological Trifecta conditions can be met for natural hydrogen exploration.
- HOREX® (Hydrogen Ore Exploration) Multiphysics imaging technology that uses passive geophysics methods combining seismic and non-seismic sensor data (sensors at 30 cm depth) to image natural hydrogen reservoirs with high accuracy and reconstruct 3D images over time (4D imaging).
- APoGeH® Quantification technology that uses liquid/gas and rock samples to quantify source rock potential (initial and yet-to-react) and evaluate gas composition, feeding field data back into Mantle8's database and GeoLogix® prospect generation.
- Simul8 Multiphysics digital twin and modelling engine used for 4D geophysical and geological modelling of subsurface hydrogen systems to simulate reservoir evolution over time and support techno-economic studies.
- Hydrogeco (Hydrogène géologique du Comminges) flagship project Flagship natural hydrogen exploration and demonstration project in the French Pyrenees, carried out under the exclusive Permis de Comminges (covering 739 km² across Haute-Garonne and Hautes-Pyrénées); serves as a pilot deployment of GeoLogix®, HOREX® and APoGeH® and is delivered through a consortium of research institutions, technical partners, transport operators and downstream industrial offtakers.
Quantifiable outcome
- Projected production costs as low as €0.80/kg of natural hydrogen
- +3 more outcomes
Companies that use Mantle8
Customer profileIdeal customer profiles3 records
Mantle8 technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability4 records
Feature6 records
Mantle8 partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core regulatory counterparty, core research partner and flagship operational partner.
- Région Auvergne-Rhône-Alpes / French Ministry of the Economycore regulatory counterpartyFrench government awarded the exclusive five-year Comminges exploration permit (PER) to G&OL SAS (Mantle8's wholly owned subsidiary), covering 739 km² across 109 municipalities. Reviewed by DGEC, DREAL Occitanie, and DGALN. Renewable up to twice.
- CNRS (Centre national de la recherche scientifique)core research partnerScientific partnership referenced on the Hydrogeco project page; collaborations with CNRS research teams ensure scientific quality and methodological rigour for exploration activities in the Comminges PER area.
- S³ – Smart Seismic Solutionsflagship operational partnerLong-term strategic partnership signed 24 February 2026 securing Mantle8 priority access to a dedicated fleet of seismic sensors and associated deployment, monitoring and data harvesting services globally. Removes a critical operational bottleneck and enables parallel worldwide exploration campaigns using HOREX. Patrick Robert (CEO and Co-Founder of S³) is quoted supporting the partnership.
Scale indicators13 records
Recent moves7 records
Expansion highlights6 records
Mantle8 competitors and assessment
Company assessmentDirect peers
- Koloma: US-based geologic hydrogen exploration and production company backed by Breakthrough Energy Ventures and Amazon's Climate Pledge Fund. Directly comparable as a venture-backed player pursuing subsurface natural hydrogen exploration, although Koloma is more US-focused and further along the capital curve.
- Natural Hydrogen Energy: Early-stage US company focused on exploring for and producing natural (geologic) hydrogen. Comparable in mission and stage to Mantle8, with overlapping scientific approach and direct competition for capital, talent and exploration acreage in the natural hydrogen space.
- Gold Hydrogen: Australia-listed natural hydrogen explorer with exploration permits in South Australia. Comparable as a publicly listed pure-play on natural hydrogen, with overlapping technology requirements and exploration methodologies, though focused on Australian acreage.
- Hydroma: French natural hydrogen exploration company developing white hydrogen resources in France and Africa. Closest geographic and thematic peer to Mantle8, with similar regulatory, geological and capital-market context; competes for European talent, permits and offtake partnerships.
- HyTerra: ASX-listed white hydrogen exploration company with operations in Nebraska (USA) and South Australia. Comparable in mission and at a similar exploration stage, although with a more North American/Australian footprint and listed-equity capital structure.
Emerging players
- H2Au (Hydrogen Australia): Australia-focused natural hydrogen exploration startup pursuing hydrogen-rich formations. Comparable in approach to Mantle8's Geological Trifecta method, with similar scientific framework but operating in a different geography and at a smaller scale.
Broad incumbents
- SLB (Schlumberger): World's largest oilfield services company, providing seismic acquisition, drilling, and subsurface evaluation services. Comparable as a potential competitor and future acquirer of Mantle8's exploration IP, with vastly greater capital and global reach.
- CGG: Global geoscience and seismic data heavyweight offering subsurface imaging, geological surveys and digital solutions to the E&P industry. Comparable because Mantle8's HOREX® multiphysics imaging competes in the same geophysical services space, although CGG is a much larger incumbent and not focused on natural hydrogen.
- TGS: Global provider of multi-client seismic data and subsurface intelligence for the energy industry. Comparable in providing the type of geophysical data and imaging that Mantle8's HOREX® platform produces, with a much larger data library and customer base.
Others
- S³ Smart Seismic Solutions: Provider of autonomous seismic sensor networks and passive seismic acquisition services. Comparable in that its sensor fleet powers Mantle8's HOREX® deployments; categorised as an infrastructure/enabling partner rather than a direct competitor.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
Mantle8 social profiles
Digital presenceMantle8 compliance and trust
Trust signalCompliance1 record
Mantle8 financial estimates
Financial estimateRevenue estimate
Valuation estimate
Mantle8 leadership team
Management profileNumber of profiles
Profiles12 records
Mantle8 subsidiaries and ownership
Company hierarchySubsidiaries1 record
Mantle8 funding detail
Funding detailFunding overview
Funding rounds3 records
Investors8 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Mantle8 M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Mantle8
What does Mantle8 do?
Mantle8 delivers geology-first natural hydrogen exploration services using a proprietary three-step technology stack — GeoLogix® (prospect generation), HOREX® (multiphysics passive imaging) and APoGeH® (source rock quantification) — supported by the Simul8 digital twin. The company identifies and evaluates underground hydrogen reservoirs for energy, industrial and infrastructure partners, currently operating the Hydrogeco flagship exploration and demonstration project in the French Pyrenees under the exclusive 739 km² Permis de Comminges.
Is Mantle8 a public or private company?
Mantle8 is a private company. It is classified as venture growth investor backed and is currently operating.
When was Mantle8 founded?
Mantle8 was founded in 2019. It employs 1 to 10 people.
Where is Mantle8 based?
Mantle8 is headquartered in Sassenage, France, in the Europe region.
How does Mantle8 make money?
One revenue line is on record: pre-revenue exploration stage.
Who are Mantle8's main competitors?
Direct peers on record are Koloma, Natural Hydrogen Energy, Gold Hydrogen, Hydroma and HyTerra. H2Au (Hydrogen Australia) is listed as an emerging player. Broad incumbents are SLB (Schlumberger), CGG and TGS. S³ Smart Seismic Solutions is listed as an others.
Does Mantle8 have an API?
No public API is recorded for Mantle8.
What industry is Mantle8 in?
Mantle8's product category is Natural Hydrogen Exploration Services. Its primary akta.pro industry code is EUALAAAA, Exploration & Prospecting (Geology, Geophysics, Seismic), with a secondary code of EUALABAK, Seismic & Geoscience Services (Acquisition, Processing, Interpretation). Its NAICS code is 54136 and its SIC code is 1382.