# H3X Technologies funding: rounds and investors

> H3X Technologies has raised $20M across 1 round since 2024. Investors include Y Combinator, Alumni Ventures and Liquid 2 Ventures. Every round with its source.

Source: https://millionrounds.com/company/h3x-technologies (Millionrounds; every figure on the page links to its filing or article)

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

# Who invested in *H3X Technologies*

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.

Aerospace & Space

Y Combinator: W21

Funding summary Updated 26 Oct 2026

**$20M** raised across 1 round since 2024, from 1 source

- **Latest round:** Series A, $20M Aug 2024
- **Investors:** 5

See who backed them

## The rounds

- **Aug 2024** Series A **$20M** [Y Combinator](https://millionrounds.com/fund/y-combinator) [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) [Liquid 2 Ventures](https://millionrounds.com/fund/liquid-2-ventures) [Pegasus Tech Ventures](https://millionrounds.com/fund/pegasus-tech-ventures) [Lockheed Martin](https://millionrounds.com/fund/lockheed-martin-ventures) Source recorded SEC filing: $20M sold, first sale Mar 2024

## Founders and team

From H3X Technologies's own website: 2 on the team.

- **Jason Sylvestre** Chief Executive Officer
- **Max Liben** Chief Technology Officer

## Everyone who backed them

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

[Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) VC firm **1** round

[Liquid 2 Ventures](https://millionrounds.com/fund/liquid-2-ventures) VC firm **1** round

[Pegasus Tech Ventures](https://millionrounds.com/fund/pegasus-tech-ventures) VC firm **1** round

[Lockheed Martin](https://millionrounds.com/fund/lockheed-martin-ventures) Corporate VC **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=h3x-technologies).

## Quick answers about H3X Technologies

### Who invested in H3X Technologies?

H3X Technologies's investors include Y Combinator, Alumni Ventures, Liquid 2 Ventures, Pegasus Tech Ventures and Lockheed Martin.

### How much has H3X Technologies raised?

H3X Technologies has raised $20M across 1 round since 2024.

### When did H3X Technologies last raise?

H3X Technologies's most recent round was a Series A of $20M in Aug 2024.

### What was H3X Technologies's biggest round?

Its most recent round, $20M in Aug 2024, is also its largest on record.

### Who backed H3X Technologies first?

H3X Technologies's first round on record, in Aug 2024, was backed by Y Combinator, Alumni Ventures and Liquid 2 Ventures and 2 others.

### What stage is H3X Technologies at?

H3X Technologies's latest named round is a Series A, in Aug 2024.

### Where is H3X Technologies based?

H3X Technologies is based in the United States.

## Companies like H3X Technologies

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

[**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)[**Apex** $1.1B · Oct 2026](https://millionrounds.com/company/apex)[**Xona** $512M · Oct 2026](https://millionrounds.com/company/xona)[**Jeevy Fabrication** Oct 2026](https://millionrounds.com/company/jeevy-fabrication)[**Varda Space Industries** $438M · Oct 2026](https://millionrounds.com/company/varda-space-industries)[**Kapta Space** $29M · Oct 2026](https://millionrounds.com/company/kapta-space)

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