# Fleetzero funding: rounds and investors

> Fleetzero has raised $43M across 1 round since 2026. Investors include Y Combinator, Founders Fund and Breakthrough Energy. Every round with its source.

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

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

# Who invested in *Fleetzero*

One round we have observed, with the 5 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

Raised 10 months ago

Funding summary Updated 26 Oct 2026

**$43M** raised across 1 round since 2026, from 1 source

- **Latest round:** Series A, $43M Jan 2026
- **Investors:** 5

See who backed them

## The rounds

- **Jan 2026** Series A **$43M** [Y Combinator](https://millionrounds.com/fund/y-combinator) [Founders Fund](https://millionrounds.com/fund/founders-fund) [Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) [Obvious Ventures](https://millionrounds.com/fund/obvious-ventures) [Cantos](https://millionrounds.com/fund/cantos) Source recorded

## Everyone who backed them

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

[Founders Fund](https://millionrounds.com/fund/founders-fund) VC firm **1** round

[Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) VC firm **1** round

[Obvious Ventures](https://millionrounds.com/fund/obvious-ventures) Accelerator **1** round

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

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

## Also claim to have backed them

This firm lists Fleetzero 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.

[Darco Capital](https://millionrounds.com/fund/darco-capital) Family office Per its own site

## Quick answers about Fleetzero

### Who invested in Fleetzero?

Fleetzero's investors include Y Combinator, Founders Fund, Breakthrough Energy, Obvious Ventures and Cantos.

### How much has Fleetzero raised?

Fleetzero has raised $43M across 1 round since 2026.

### When did Fleetzero last raise?

Fleetzero's most recent round was a Series A of $43M in Jan 2026.

### What was Fleetzero's biggest round?

Its most recent round, $43M in Jan 2026, is also its largest on record.

### Who backed Fleetzero first?

Fleetzero's first round on record, in Jan 2026, was backed by Y Combinator, Founders Fund and Breakthrough Energy and 2 others.

### What stage is Fleetzero at?

Fleetzero's latest named round is a Series A, in Jan 2026.

### Where is Fleetzero based?

Fleetzero is based in the United States.

## Companies like Fleetzero

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)[**Pivot Energy** $500M · Oct 2026](https://millionrounds.com/company/pivot-energy)[**Peak Energy** $163M · Oct 2026](https://millionrounds.com/company/peak-energy)[**Pennsylvania American Water** $43M · Oct 2026](https://millionrounds.com/company/pennsylvania-american-water)[**Vertical Semiconductor** $84M · Oct 2026](https://millionrounds.com/company/vertical-semiconductor)

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