# Mantle8 funding: rounds and investors > Mantle8 has raised $38M across 2 rounds since 2026. Investors include Breakthrough Energy, Sandwater and Bpifrance. Every round with its source. Source: https://millionrounds.com/company/mantle8 (Millionrounds; every figure on the page links to its filing or article) France · [Series A startup](https://millionrounds.com/companies) # Who invested in *Mantle8* 2 rounds we have observed, with the 6 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it. Cleantech Energy Raised 6 months ago Follow Mantle8 and see its new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Fmantle8) Funding summary Updated 5 Nov 2026 **$38M** raised across 2 rounds since 2026, from 2 sources **$2.4M** Grant **$36M** Series A - **Latest round:** Series A, $36M May 2026 - **Led by:** Sandwater - **Step-up i:** 15× - **Investors:** 6 (1 led) See who backed them ## The funding story Each circle is a round, placed by date and sized by amount. The line above is the running total. 2027 **$2.4M** Grant **$36M** Series A - **First round:** Grant, $2.4M - **Biggest round:** $36M - **Between rounds:** 2 months ## The rounds - **May 2026** Series A **$36M** *5 new* *1 returning* [Sandwater](https://millionrounds.com/fund/sandwater) Lead [Bpifrance](https://millionrounds.com/fund/bpifrance) [IP Group](https://millionrounds.com/fund/ip-group) [Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) [Wind](https://millionrounds.com/fund/wind) [Calderion](https://millionrounds.com/fund/calderion) Reported by Ventureburn - **Mar 2026** Grant **$2.4M** *1 new* [Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) Source recorded ## Founders and team From Mantle8's own website: 5 on the team. - **Aurian Durbuis** Chief of Staff - **Bryce Hutchinson** Data Lead - **Johanne Ulrich** Funding Manager - **Julien Perrutel** Senior Project Manager - **Laurence Tiberghien-Portaz** Director of HR ## Who was in which round The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led. **Grant** 2026 **Series A** 2026 [Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) [Sandwater](https://millionrounds.com/fund/sandwater) L [Bpifrance](https://millionrounds.com/fund/bpifrance) [IP Group](https://millionrounds.com/fund/ip-group) [Wind](https://millionrounds.com/fund/wind) [Calderion](https://millionrounds.com/fund/calderion) ## Everyone who backed them [Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) VC firm **2** rounds [Sandwater](https://millionrounds.com/fund/sandwater) VC firm **1** round, led 1 [Bpifrance](https://millionrounds.com/fund/bpifrance) Government **1** round [IP Group](https://millionrounds.com/fund/ip-group) VC firm **1** round [Wind](https://millionrounds.com/fund/wind) VC firm **1** round [Calderion](https://millionrounds.com/fund/calderion) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=mantle8). ## Also claim to have backed them This firm lists Mantle8 as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above. [Touchstone Innovations](https://millionrounds.com/fund/touchstone-innovations) VC firm Per its own site ## Quick answers about Mantle8 ### Who invested in Mantle8? Mantle8's investors include Breakthrough Energy, Sandwater, Bpifrance, IP Group and Wind, and 1 more on record. Sandwater led its latest round. ### How much has Mantle8 raised? Mantle8 has raised $38M across 2 rounds since 2026. ### When did Mantle8 last raise? Mantle8's most recent round was a Series A of $36M in May 2026, led by Sandwater. ### What was Mantle8's biggest round? Its most recent round, $36M in May 2026, is also its largest on record. ### Who backed Mantle8 first? Mantle8's first round on record, in Mar 2026, was backed by Breakthrough Energy. ### What stage is Mantle8 at? Mantle8's latest named round is a Series A, in May 2026. ### Where is Mantle8 based? Mantle8 is based in France. ### Who led Mantle8's rounds? Sandwater led the Series A in 2026. ## Companies like Mantle8 In the same sector, and raised in the last eighteen months. [**Elax Energy** $34M · Oct 2026](https://millionrounds.com/company/elax-energy)[**EPYR** $20M · Oct 2026](https://millionrounds.com/company/epyr)[**HyLight** $18M · Oct 2026](https://millionrounds.com/company/hylight)[**Voltheia** $5.4M · Aug 2026](https://millionrounds.com/company/voltheia)[**Technip Energies** $1.4B · Jun 2026](https://millionrounds.com/company/technip-energies)[**Otrera** $20M · May 2026](https://millionrounds.com/company/otrera) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. 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