# Climate Vault funding: rounds and investors

> Climate Vault has raised $9.4M across 1 round since 2023. Investors include Valor Siren Ventures. Every round with its source.

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

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

# Who invested in *Climate Vault*

One round we have observed, with the one investor 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.

Climate Tech

Funding summary Updated 26 Oct 2026

**$9.4M** raised across 1 round since 2023, from 1 source

- **Latest round:** Venture, $9.4M May 2023
- **Investors:** 1

See who backed them

## The rounds

- **May 2023** Venture **$9.4M** [Valor Siren Ventures](https://millionrounds.com/fund/valor-siren-ventures) Source recorded SEC filing: $7.3M sold, first sale Mar 2023

## Founders and team

From Climate Vault's own website: 1 founder, 3 on the team.

**Michael Greenstone** Co-founder

- **Chris Neufeld** CEO
- **Brynn Esterly** Head of Climate Solutions Portfolio
- **Donald Addu** Head of Climate Partnerships

## Everyone who backed them

[Valor Siren Ventures](https://millionrounds.com/fund/valor-siren-ventures) Corporate VC **1** round

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

## Also claim to have backed them

This firm lists Climate Vault 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.

[Thirdstream Partners](https://millionrounds.com/fund/thirdstream-partners) VC firm Per its own site

## Quick answers about Climate Vault

### Who invested in Climate Vault?

Climate Vault's investors include Valor Siren Ventures.

### How much has Climate Vault raised?

Climate Vault has raised $9.4M across 1 round since 2023.

### When did Climate Vault last raise?

Climate Vault's most recent round was a Venture of $9.4M in May 2023.

### What was Climate Vault's biggest round?

Its most recent round, $9.4M in May 2023, is also its largest on record.

### Who backed Climate Vault first?

Climate Vault's first round on record, in May 2023, was backed by Valor Siren Ventures.

### What stage is Climate Vault at?

Climate Vault's latest named round is a Venture, in May 2023.

### Where is Climate Vault based?

Climate Vault is based in the United States.

## Companies like Climate Vault

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

[**Amogy** $125M · Oct 2026](https://millionrounds.com/company/amogy)[**LanzaJet** $67M · Oct 2026](https://millionrounds.com/company/lanzajet)[**ZwitterCo** $58M · Oct 2026](https://millionrounds.com/company/zwitterco)[**Pennsylvania American Water** $43M · Oct 2026](https://millionrounds.com/company/pennsylvania-american-water)[**Kodama** $7.0M · Oct 2026](https://millionrounds.com/company/kodama)[**Stand** $105M · Oct 2026](https://millionrounds.com/company/stand)

## 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