# PromptArmor funding: rounds and investors

> PromptArmor has raised $3.2M across 1 round since 2024. Investors include Y Combinator and Liquid 2 Ventures. Every round with its source.

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

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

# Who invested in *PromptArmor*

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

**$3.2M** raised across 1 round since 2024, from 1 source

- **Latest round:** Seed, $3.2M Apr 2024
- **Investors:** 2

See who backed them

## The rounds

- **Apr 2024** Seed **$3.2M** [Y Combinator](https://millionrounds.com/fund/y-combinator) [Liquid 2 Ventures](https://millionrounds.com/fund/liquid-2-ventures) Source recorded

## Everyone who backed them

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

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

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

## Also claim to have backed them

This firm lists PromptArmor 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.

[Litquidity Ventures](https://millionrounds.com/fund/litquidity-ventures) VC firm Per its own site

## Quick answers about PromptArmor

### Who invested in PromptArmor?

PromptArmor's investors include Y Combinator and Liquid 2 Ventures.

### How much has PromptArmor raised?

PromptArmor has raised $3.2M across 1 round since 2024.

### When did PromptArmor last raise?

PromptArmor's most recent round was a Seed of $3.2M in Apr 2024.

### What was PromptArmor's biggest round?

Its most recent round, $3.2M in Apr 2024, is also its largest on record.

### Who backed PromptArmor first?

PromptArmor's first round on record, in Apr 2024, was backed by Y Combinator and Liquid 2 Ventures.

### What stage is PromptArmor at?

PromptArmor's latest named round is a Seed, in Apr 2024.

### Where is PromptArmor based?

PromptArmor is based in the United States.

## Companies like PromptArmor

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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