# Curvestone AI funding: rounds and investors

> Curvestone AI has raised $4.0M across 1 round since 2025. Investors include Portfolio Ventures. Every round with its source.

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

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

# Who invested in *Curvestone AI*

One round we have observed, with the one investor 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

Raised 11 months ago

Funding summary Updated 26 Oct 2026

**$4.0M** raised across 1 round since 2025, from 1 source

- **Latest round:** Seed, $4.0M Dec 2025
- **Investors:** 1

See who backed them

## The rounds

- **Dec 2025** Seed **$4.0M** [Portfolio Ventures](https://millionrounds.com/fund/will-martin) Source recorded

## Everyone who backed them

[Portfolio Ventures](https://millionrounds.com/fund/will-martin) VC firm **1** round

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

## Quick answers about Curvestone AI

### Who invested in Curvestone AI?

Curvestone AI's investors include Portfolio Ventures.

### How much has Curvestone AI raised?

Curvestone AI has raised $4.0M across 1 round since 2025.

### When did Curvestone AI last raise?

Curvestone AI's most recent round was a Seed of $4.0M in Dec 2025.

### What was Curvestone AI's biggest round?

Its most recent round, $4.0M in Dec 2025, is also its largest on record.

### Who backed Curvestone AI first?

Curvestone AI's first round on record, in Dec 2025, was backed by Portfolio Ventures.

### What stage is Curvestone AI at?

Curvestone AI's latest named round is a Seed, in Dec 2025.

### Where is Curvestone AI based?

Curvestone AI is based in the United Kingdom.

## Companies like Curvestone AI

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

[**Marrow** $2.0M · Oct 2026](https://millionrounds.com/company/marrow)[**Cognitive Credit** $64M · Oct 2026](https://millionrounds.com/company/cognitive-credit)[**Opply** $23M · Oct 2026](https://millionrounds.com/company/opply)[**XRlabs** $8.4M · Oct 2026](https://millionrounds.com/company/xrlabs)[**Salience Labs** $169M · Oct 2026](https://millionrounds.com/company/salience-labs)[**Affinity Labs** $3.2M · Oct 2026](https://millionrounds.com/company/affinity-labs)

## Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.

Open the investor searchOr these rounds in the app