Mantle8

FranceGrenobleEnergy & ClimateSeries A

Overview

Where Mantle8 is now

Mantle8 announced a Series A round of €31M on 13 May 2026, led by Sandwater.

Observed Described in the funding announcement as "developer of natural hydrogen exploration and subsurface modeling technologies". Source

Latest round
Series A
Amount
€31M
Announced
13 May 2026
Headquarters
Grenoble, France
Sector
Energy & Climate
Investors
Sandwater
Also participating
Breakthrough Energy Ventures, the Ecotechnologies 2 fund (managed by Bpifrance), IP Group, Wind Capital, and Calderion
Relevant leadership
Founder and CEO Emmanuel Masini

Current direction Inferred

What this company is working on

Commercial growth

Read from the company's own description of what the funding supports.

Momentum Inferred

AfterRaise Score

49
Steady growth
0 funding signals in the last 90 days
Funding recency
18/40
announced within the last 6 months
Round scale
16/25
round size relative to the market
Funding stage
15/20
Series A
Funding cadence
0/15
one funding event tracked this year
Arriving with the signals layer
  • Hiring momentum Open roles and hiring pace
  • Market expansion New offices and new countries
  • Leadership Executive appointments
  • Product activity Launches and releases

Growth timeline

What has happened so far

  • 13 May 2026
    €31M Series A
    Led by Sandwater.

Observed The timeline currently holds funding events, because those are the signals AfterRaise observes today. Hiring, leadership, expansion and product events join it with the signals layer.

Moves

Published by the company

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Opportunities

Work this company has opened

No open Opportunities listed

Jobs, projects, partnerships and advisory needs appear here once the company has claimed its room and published them.

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Open to

Who may approach Mantle8

Not yet specified

Mantle8 has not told AfterRaise which approaches it welcomes. Until it does, we do not assume. Offers to help are held and shown to the company, and the company decides whether to open a conversation.

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Helpful contributors

People who have contributed here

Nobody yet

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This room belongs to Mantle8.

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Also moving

Other Energy & Climate companies

See the sector