# Airthium funding: rounds and investors

> Airthium has raised $3.2M across 1 round since 2024. Investors include Y Combinator and Daphni. Every round with its source.

Source: https://millionrounds.com/company/airthium (Millionrounds; every figure on the page links to its filing or article)

France · [Venture startup](https://millionrounds.com/companies)

# Who invested in *Airthium*

One round we have observed, with the 2 investors named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Energy

Y Combinator: S17

Funding summary Updated 26 Oct 2026

**$3.2M** raised across 1 round since 2024, from 1 source

- **Latest round:** Venture, $3.2M Mar 2024
- **Investors:** 2

See who backed them

## The rounds

- **Mar 2024** Venture **$3.2M** [Y Combinator](https://millionrounds.com/fund/y-combinator) [Daphni](https://millionrounds.com/fund/daphni) Source recorded

## Founders and team

From Airthium's own website: 1 on the team.

- **Government Backed** Technology Partner

## Everyone who backed them

[Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round

[Daphni](https://millionrounds.com/fund/daphni) VC firm **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=airthium).

## Also claim to have backed them

This firm lists Airthium 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.

[Polytechnique Ventures](https://millionrounds.com/fund/polytechnique-ventures) VC firm Per its own site

## Quick answers about Airthium

### Who invested in Airthium?

Airthium's investors include Y Combinator and Daphni.

### How much has Airthium raised?

Airthium has raised $3.2M across 1 round since 2024.

### When did Airthium last raise?

Airthium's most recent round was a Venture of $3.2M in Mar 2024.

### What was Airthium's biggest round?

Its most recent round, $3.2M in Mar 2024, is also its largest on record.

### Who backed Airthium first?

Airthium's first round on record, in Mar 2024, was backed by Y Combinator and Daphni.

### What stage is Airthium at?

Airthium's latest named round is a Venture, in Mar 2024.

### Where is Airthium based?

Airthium is based in France.

## Companies like Airthium

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)[**Mantle8** $38M · May 2026](https://millionrounds.com/company/mantle8)

## Find investors like these

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