# AirMettle funding: rounds and investors

> AirMettle has raised $207K across 1 round since 2024. Investors include National Science Foundation and US Department of Energy. Every round with its source.

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

United States · [Funded startup](https://millionrounds.com/companies)

# Who invested in *AirMettle*

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.

Big Data & Analytics

Funding summary Updated 26 Oct 2026

**$207K** raised across 1 round since 2024, from 1 source

- **Latest round:** Grant, $207K Jan 2024
- **Investors:** 2

See who backed them

## The rounds

- **Jan 2024** Grant **$207K** [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) Source recorded

## Founders and team

From AirMettle's own website: 1 founder, 2 on the team.

**Donpaul Stephens** Founder and CEO

- **Dan Orlow** Board Member
- **Katsumi Kato** Software Engineer

## Everyone who backed them

[National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) Government **1** round

[US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) Government **1** round

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

## Quick answers about AirMettle

### Who invested in AirMettle?

AirMettle's investors include National Science Foundation and US Department of Energy.

### How much has AirMettle raised?

AirMettle has raised $207K across 1 round since 2024.

### When did AirMettle last raise?

AirMettle's most recent round was a Grant of $207K in Jan 2024.

### What was AirMettle's biggest round?

Its most recent round, $207K in Jan 2024, is also its largest on record.

### Who backed AirMettle first?

AirMettle's first round on record, in Jan 2024, was backed by National Science Foundation and US Department of Energy.

### What stage is AirMettle at?

AirMettle's latest named round is a Grant, in Jan 2024.

### Where is AirMettle based?

AirMettle is based in the United States.

## Companies like AirMettle

In the same sector, and raised in the last eighteen months.

[**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)[**STRIVE** $1.3B · Oct 2026](https://millionrounds.com/company/strive)[**Xona** $512M · Oct 2026](https://millionrounds.com/company/xona)[**DrizzleX** $9.1M · Oct 2026](https://millionrounds.com/company/drizzlex)[**Prism Data** $25M · Oct 2026](https://millionrounds.com/company/prism-data)[**Homa** $5.0M · Oct 2026](https://millionrounds.com/company/homa)

## Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.

Open the investor searchOr these rounds in the app