# Rrreefs funding: rounds and investors

> Rrreefs has raised $1.1M across 2 rounds since 2024. Investors include MassChallenge. Every round with its source.

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

Switzerland · [Crowdfunding startup](https://millionrounds.com/companies)

# Who invested in *Rrreefs*

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.

Advanced Manufacturing

Raised 5 months ago

Funding summary Updated 26 Oct 2026

**$1.1M** raised across 2 rounds since 2024, from 2 sources

**$29K** Grant **$1.1M** Crowdfunding

- **Latest round:** Crowdfunding, $1.1M Jun 2026
- **Step-up i:** 37.9×
- **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

**$29K** Grant

**$1.1M** Crowdfunding

- **First round:** Grant, $29K
- **Biggest round:** $1.1M
- **Between rounds:** 21 months

## The rounds

- **Jun 2026** Crowdfunding **$1.1M** *1 returning* [MassChallenge](https://millionrounds.com/fund/masschallenge) Source recorded
- **Sept 2024** Grant **$29K** *1 new* [MassChallenge](https://millionrounds.com/fund/masschallenge) Source recorded

## Founders and team

From Rrreefs's own website: 4 founders, 4 on the team.

**Dr. Ulrike Pfreundt** Co-Founder, Co-CEO

**Josephine Graf** Co-Founder, Co-CEO

**Hanna Kuhfuss** Co-Founder, Chief Field Operations & International Relations

**Marie Griesmar** Co-Founder, COO

- **Mauro Bischoff** Head of Production
- **Olivia Grubenmann** Head of Communications & Marketing
- **Abi Ferrazini** Lead Reef Rehabilitation & Conservation Training, PH
- **Che Adlawan** Lead Sustainable livelihood & Social Inclusion Strategy, PH

Advisers *Stephan Hillert* *Barbara Truyers*

## Everyone who backed them

[MassChallenge](https://millionrounds.com/fund/masschallenge) Accelerator **2** rounds

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

## Quick answers about Rrreefs

### Who invested in Rrreefs?

Rrreefs's investors include MassChallenge.

### How much has Rrreefs raised?

Rrreefs has raised $1.1M across 2 rounds since 2024.

### When did Rrreefs last raise?

Rrreefs's most recent round was a Crowdfunding of $1.1M in Jun 2026.

### What was Rrreefs's biggest round?

Its most recent round, $1.1M in Jun 2026, is also its largest on record.

### Who backed Rrreefs first?

Rrreefs's first round on record, in Sept 2024, was backed by MassChallenge.

### What stage is Rrreefs at?

Rrreefs's latest named round is a Crowdfunding, in Jun 2026.

### Where is Rrreefs based?

Rrreefs is based in Switzerland.

## Companies like Rrreefs

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

[**Jaipur Robotics** $5.2M · Sept 2026](https://millionrounds.com/company/jaipur-robotics)[**KEMARO AG** $5.0M · Apr 2026](https://millionrounds.com/company/kemaro-ag)[**Spacetek Technology AG** $18M · Nov 2025](https://millionrounds.com/company/spacetek-technology-ag)[**Vestir AI** $535K · Oct 2025](https://millionrounds.com/company/vestir-ai)[**ANYbotics** $80M · Sept 2025](https://millionrounds.com/company/anybotics)[**Apheros** Sept 2025](https://millionrounds.com/company/apheros)

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