# Promptfoo funding: rounds and investors

> Promptfoo has raised $18M across 1 round since 2025. Investors include Andreessen Horowitz and Insight Partners. Every round with its source.

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

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

# Who invested in *Promptfoo*

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.

AI

Funding summary Updated 26 Oct 2026

**$18M** raised across 1 round since 2025, from 1 source

- **Latest round:** Series A, $18M Jul 2025
- **Investors:** 2

See who backed them

## The rounds

- **Jul 2025** Series A **$18M** [Andreessen Horowitz](https://millionrounds.com/fund/andreessen-horowitz) [Insight Partners](https://millionrounds.com/fund/insight-venture-partners) Source recorded SEC filing: $17M sold, first sale Jul 2025

## Founders and team

From Promptfoo's own website: 2 founders.

**Ian Webster** CEO & Co-founder

**Michael D'Angelo** CTO & Co-founder

## Everyone who backed them

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

[Insight Partners](https://millionrounds.com/fund/insight-venture-partners) VC firm **1** round

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

## Quick answers about Promptfoo

### Who invested in Promptfoo?

Promptfoo's investors include Andreessen Horowitz and Insight Partners.

### How much has Promptfoo raised?

Promptfoo has raised $18M across 1 round since 2025.

### When did Promptfoo last raise?

Promptfoo's most recent round was a Series A of $18M in Jul 2025.

### What was Promptfoo's biggest round?

Its most recent round, $18M in Jul 2025, is also its largest on record.

### Who backed Promptfoo first?

Promptfoo's first round on record, in Jul 2025, was backed by Andreessen Horowitz and Insight Partners.

### What stage is Promptfoo at?

Promptfoo's latest named round is a Series A, in Jul 2025.

### Where is Promptfoo based?

Promptfoo is based in the United States.

## Companies like Promptfoo

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

[**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)[**xPay** $1.5M · Oct 2026](https://millionrounds.com/company/xpay)[**Albert Invent** $20M · Oct 2026](https://millionrounds.com/company/albert-invent)[**FORT Robotics** $39M · Oct 2026](https://millionrounds.com/company/fort-robotics)[**Pika** $216M · Oct 2026](https://millionrounds.com/company/pika)[**Vertical Semiconductor** $84M · Oct 2026](https://millionrounds.com/company/vertical-semiconductor)

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