# Cardboard funding: rounds and investors

> Cardboard has raised $2.6M across 2 rounds since 2024. Investors include Y Combinator. Every round with its source.

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

United States · [Pre-seed startup](https://millionrounds.com/companies)

# Who invested in *Cardboard*

2 rounds we have observed, with the one investor named in them. 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 8 months ago

Funding summary Updated 26 Oct 2026

**$2.6M** raised across 2 rounds since 2024, from 2 sources

**$2.1M** Seed **$500K** Pre-seed

- **Latest round:** Pre-seed, $500K Mar 2026
- **Biggest round:** $2.1M Seed · Aug 2024
- **Investors:** 1

See who backed them

## The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2025 2026

**$2.1M** Seed

**$500K** Pre-seed

- **First round:** Seed, $2.1M
- **Biggest round:** $2.1M
- **Between rounds:** 19 months

## The rounds

- **Mar 2026** Pre-seed **$500K** *1 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) Source recorded
- **Aug 2024** Seed **$2.1M** No investor was named in the report. Source recorded

## Founders and team

From Cardboard's own website: 5 founders, 1 on the team.

**Andreas Røyrvik** Co-founder and CPO

**Jakob Gerhard Martinussen** Co-founder and CTO

**Stein Magnus Jodal** Co-founder and COO

**Lars Syse Christiansen** Co-founder and Chairperson

**Vidhi Kumar** Co-founder and CGO

- **Ole Daniel Nitter** CEO

## Everyone who backed them

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

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

## Also claim to have backed them

These 2 firms list Cardboard as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.

[ProVenture](https://millionrounds.com/fund/proventure) VC firm Per its own site

[Sondo Capital](https://millionrounds.com/fund/sondo-capital) VC firm Per its own site

## Quick answers about Cardboard

### Who invested in Cardboard?

Cardboard's investors include Y Combinator.

### How much has Cardboard raised?

Cardboard has raised $2.6M across 2 rounds since 2024.

### When did Cardboard last raise?

Cardboard's most recent round was a Pre-seed of $500K in Mar 2026.

### What was Cardboard's biggest round?

Cardboard's largest round on record is $2.1M (Seed), in Aug 2024.

### Who backed Cardboard first?

Cardboard's first round on record, in Mar 2026, was backed by Y Combinator.

### What stage is Cardboard at?

Cardboard's latest named round is a Pre-seed, in Mar 2026.

### Where is Cardboard based?

Cardboard is based in the United States.

## Companies like Cardboard

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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