# Mantle8

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/mantle8

- Industry: Oil & Gas
- Headquarters: Grenoble, France
- Website: www.mantle8.com/
- Total disclosed funding: $40M
- Latest round: Series A (May 11, 2026)
- Investors on record: 6

## About

Founded in 2024 and based in Grenoble, France, Mantle8 SASU was founded by Emmanuel Masini and operates as a natural hydrogen exploration company providing innovative geological technologies and solutions to identify and assess hydrogen reservoirs. In May 2026, the company raised EUR 33.06 million in Series A and grant funding led by Sandwater, with participation from Bpifrance Green Venture, Kiko Ventures, Wind, Calderion, the European Commission, and Breakthrough Energy Ventures.

Mantle8 specializes in the exploration and detection of natural hydrogen reserves through proprietary technology that integrates geophysics, geochemistry, and seismic data. Their core offerings focus on creating highly accurate predictive models for locating naturally occurring hydrogen reservoirs. The company's innovative multiphysics imaging technology allows for the visualization of hydrogen-generating systems, facilitating the assessment of both the quantity and quality of hydrogen present in the subsurface. Target customers include energy companies and industrial sectors seeking sustainable hydrogen solutions, particularly in regions pursuing decarbonization strategies, such as Europe and parts of North America. Mantle8 aims to scale its technology globally, supporting diverse markets transitioning to clean energy sources. 

The company plans to utilize the May 2026 funding to finish its global exploration and drilling campaign for high-purity natural hydrogen and advance its exploration technology.

## Funding rounds

- Series A, May 11, 2026, $36M — Audacia, Bpifrance Investissement, Breakthrough Energy Ventures, Kiko Ventures, Sandwater, Wind
- Seed, Feb 7, 2025, $3.5M — Breakthrough Energy Ventures, Kiko Ventures

## Investors

- Breakthrough Energy Ventures (https://capitalatlas.ai/funds/breakthrough-energy-ventures) — Seed, Series A
- Kiko Ventures (https://capitalatlas.ai/funds/kiko-ventures) — Seed, Series A
- Audacia (https://capitalatlas.ai/funds/audacia) — Series A
- Bpifrance Investissement (https://capitalatlas.ai/funds/bpifrance-investissement) — Series A
- Sandwater (https://capitalatlas.ai/funds/sandwater) — Series A
- Wind (https://capitalatlas.ai/funds/wind) — Series A