# Arcjet funding: rounds and investors

> Arcjet has raised $8.5M across 1 round since 2025. Investors include Andreessen Horowitz and Seedcamp. Every round with its source.

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

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

# Who invested in *Arcjet*

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.

Cybersecurity

Funding summary Updated 26 Oct 2026

**$8.5M** raised across 1 round since 2025, from 1 source

- **Latest round:** Series A, $8.5M Oct 2025
- **Investors:** 2

See who backed them

## The rounds

- **Oct 2025** Series A **$8.5M** [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) [Seedcamp](https://millionrounds.com/fund/seedcamp) Source recorded

## Everyone who backed them

[Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) VC firm **1** round

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

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

## Quick answers about Arcjet

### Who invested in Arcjet?

Arcjet's investors include Andreessen Horowitz and Seedcamp.

### How much has Arcjet raised?

Arcjet has raised $8.5M across 1 round since 2025.

### When did Arcjet last raise?

Arcjet's most recent round was a Series A of $8.5M in Oct 2025.

### What was Arcjet's biggest round?

Its most recent round, $8.5M in Oct 2025, is also its largest on record.

### Who backed Arcjet first?

Arcjet's first round on record, in Oct 2025, was backed by Andreessen Horowitz and Seedcamp.

### What stage is Arcjet at?

Arcjet's latest named round is a Series A, in Oct 2025.

### Where is Arcjet based?

Arcjet is based in the United States.

## Companies like Arcjet

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

[**FORT Robotics** $39M · Oct 2026](https://millionrounds.com/company/fort-robotics)[**Opsin** $21M · Oct 2026](https://millionrounds.com/company/opsin)[**Harmonic Security** $68M · Oct 2026](https://millionrounds.com/company/harmonic-security)[**Reach Security** $60M · Oct 2026](https://millionrounds.com/company/reach-security)[**Persona** $210M · Oct 2026](https://millionrounds.com/company/persona)[**Hilt** $4.7M · Oct 2026](https://millionrounds.com/company/hilt)

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