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Mantle8

French natural hydrogen exploration company

Mantle8 has raised €36M across 3 funding rounds from 10 investors, most recently a Series A round in May 2026. Based in Paris, France; active in Energy. Data as of 28 Oct 2026.

Paris, Francemantle8.com ↗
Energy
← All companies
Total raised
€36M
€36,460,000
Funding rounds
3
Investors
10
distinct backers
Active since
2025-02
latest 2026-05

Funding by year

EUR raised per year · 2026 YTD
Mantle8 — funding by year — interactive chart.
Data table
Mantle8 — funding by year
2025€3.4M
2026€33M

Signals

High confidence
Raise-next likelihood35
base rate 44% for Series A
  • ▼ Raised very recently
  • ▲ Up-round momentum
  • ▼ Low backer re-investment
Exit likelihood18
base rate 11% (2+ rounds)
  • ▲ €30M+ raised
  • ▼ Young (<3y)
  • ▲ Recently backed by strong-exit-track investors

Timing: too soon vs cohort gap · momentum up. Funding-only estimates, not predictions and not investment advice — see signals.

Funding rounds

3 rounds
DateStageAmountInvestors
2026-05-13Series A€31MBreakthrough Energy Ventures,Calderion,Ecotechnologies 2 fund,IP Group,Sandwater,Wind CapitalView deal →
2026-03-10Grant€2.1MEuropean Union’s Just Transition FundView deal →
2025-02-07Seed€3.4MAngel Investors,Breakthrough Energy Ventures Europe (BEV-E),Kiko VenturesView deal →

Investors

10
Angel InvestorsBreakthrough Energy VenturesBreakthrough Energy Ventures Europe (BEV-E)CalderionEcotechnologies 2 fundEuropean Union’s Just Transition FundIP GroupKiko VenturesSandwaterWind Capital

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