# Fleetzero: Maritime, Houston, United States

> Fleetzero: Fleetzero is a marine technology company founded in 2021, focused on developing battery-electric cargo ships and hybrid/electric propulsion systems.

Source: https://millionrounds.com/startup/fleetzero-2 (Millionrounds; every figure on the page links to its filing or article)

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

# Fleetzero

Fleetzero is a marine technology company founded in 2021, focused on developing battery-electric cargo ships and hybrid/electric propulsion systems.

Funding reported Last round: Series A

Maritime Houston, United States

Company summary

- **Founded:** 2021 5 years old
- **Team:** 40 11 to 50 people
- **Funding reported:** $60M in dollars
- **Last round:** Series A Jan 2026

How sure we are

- ✓ **Listed** We know it exists and what it does
- 2 **Funding reported** A company dataset reports a raise
- 3 **Observed** A filing or a dated announcement confirms a round

No round for Fleetzero has been confirmed by a filing or an announcement yet, so nothing here counts toward an investor's record. [How we decide](https://millionrounds.com/methodology)

## About Fleetzero

Fleetzero is a marine technology company founded in 2021, focused on developing battery-electric cargo ships and hybrid/electric propulsion systems.

The company aims to decarbonize ocean freight by providing zero-emission alternatives that are more affordable than traditional fossil-fuel vessels. Its mission is to make shipping cleaner, safer, and more economical. Headquartered in Birmingham, Alabama, with a manufacturing and research facility in Houston, Texas, Fleetzero has raised approximately $43 million in Series A financing. The company employs around 17 people and is led by co-founders Steven Henderson and Mike Carter. Fleetzero's product offerings include the Leviathan Propulsion Platform, marine battery systems, a battery-swapping system, and services for converting diesel ships to battery-electric configurations. The company primarily serves commercial shipping companies and ocean freight operators, focusing on long-range trans-pacific cargo delivery routes.

## What company datasets say Fleetzero raised

Funding, as reported

Reported in all **$60M** in dollars

Last round **Series A**

Last round size **$43M**

Last round date **Jan 2026**

Y Combinator **W22**

## On 2 portfolio pages

Investors who name them

- [Darco Capital](https://millionrounds.com/fund/darco-capital)
- [Obvious Ventures](https://millionrounds.com/fund/obvious-ventures)

Each firm lists Fleetzero on its own website. That is the firm's claim, a weaker thing than a round we watched, but a named source.

## The company, in detail

What they build

Known for

clean energy & technology electric ships energy storage marine engineering ship retrofit battery technology maritime transportation autonomous ships environmental services marine battery technology oil & energy zero-emission vessels sustainable shipping high c-rate applications ship and boat building marine battery chemistry

Built with from their website

Google Tag Manager Confluent parallax.js Canva Squarespace ECommerce Atlassian Lever Google Ads YouTube Google Workspace

+8 more

Gem Viewport Meta LinkedIn Ads X (Twitter) AI Google Meet Priority Hints ANSYS

- **Sector:** Maritime
- **Industry code:** NAICS 33661, SIC 3731
- **Region:** Texas

## Maritime in United States

Startups like it

- [**Libra** San Francisco · founded 2014 *Raised*](https://millionrounds.com/company/libra)
- [**Navier** San Francisco · founded 2020 *Raised*](https://millionrounds.com/company/navier)
- [**ioCurrents** Seattle · founded 2015 *Raised*](https://millionrounds.com/company/iocurrents)
- [**Snag-A-Slip** Baltimore · founded 2015 *Raised*](https://millionrounds.com/company/snag-a-slip)
- [**Arc** Los Angeles · founded 2021](https://millionrounds.com/startup/arc)
- [**REGENT** North Kingstown · founded 2020](https://millionrounds.com/startup/regent-2)
- [**ThayerMahan, Inc.** Groton · founded 2016](https://millionrounds.com/startup/thayermahan-inc)
- [**Nautilus Labs** New York · founded 2016](https://millionrounds.com/startup/nautilus-labs)

## Is this your company?

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