# Ostrea: Architecture & planning, Thorigne-Fouillard, France

> Ostrea: Ostrea is a French climate-tech startup founded in 2020, specializing in the production of a high-performance, low-carbon material made from...

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

France · [Architecture & planning startup](https://millionrounds.com/companies)

# Ostrea

Ostrea is a French climate-tech startup founded in 2020, specializing in the production of a high-performance, low-carbon material made from upcycled seashells, including oyster, s

Funding reported Last round: Seed

Architecture & planning Thorigne-Fouillard, France

Company summary

- **Founded:** 2021 5 years old
- **Team:** 23 11 to 50 people
- **Funding reported:** 6.8M as listed, currency not stated
- **Last round:** Seed Mar 2025

How sure we are

- ✓ **Listed** We know it exists and what it does
- 2 **Funding reported** A company dataset reports a raise
- 3 **Observed** A filing or a dated announcement confirms a round

No round for Ostrea has been confirmed by a filing or an announcement yet, so nothing here counts toward an investor's record. [How we decide](https://millionrounds.com/methodology)

## About Ostrea

Ostrea is a French climate-tech startup founded in 2020, specializing in the production of a high-performance, low-carbon material made from upcycled seashells, including oyster, s

callop, and mussel shells. This innovative material is designed for sustainable architecture and design, transforming marine shell waste into a 100% recyclable, bio-mineral product that is durable, heat-resistant, UV-resistant, and abrasion-resistant. Headquartered in Thorigné-Fouillard, Brittany, Ostrea operates a 5,600 m2 factory where it designs, sources, and manufactures its products entirely in France. The company's core offering is a marine terrazzo-style material used for various applications, including flooring, countertops, furniture panels, washbasin tops, and surface coatings. Ostrea targets industries focused on sustainable architecture, interior design, and eco-friendly construction, emphasizing its commitment to the circular economy by turning shell waste into valuable resources.

## What company datasets say Ostrea raised

Funding, as reported

Reported in all **6.8M** in the source's currency

Last round **Seed**

Last round size **5.5M**

Last round date **Mar 2025**

Investors listed **2**

## The company, in detail

What they build

Known for

bas carbone architecture home decor b2c coquillages recycles fabricant materiaux durables b2b retail furniture & home furnishings manufacturing

Built with from their website

OVHcloud Google Workspace Google Meet Gmail

- **Sector:** Architecture & planning
- **Industry code:** NAICS 327999
- **Region:** Brittany

## Architecture & planning in France

Startups like it

- [**DATA SHAPES** Paris · founded 2017](https://millionrounds.com/startup/data-shapes)
- [**E-SPORT MANAGEMENT** Valbonne · founded 2017](https://millionrounds.com/startup/e-sport-management)
- [**SPORTBAK** Meyreuil](https://millionrounds.com/startup/sportbak)
- [**Slean** Paris · founded 2020](https://millionrounds.com/startup/slean)
- [**Archidvisor** Bordeaux · founded 2016](https://millionrounds.com/startup/archidvisor)
- [**rencontreunarchi.com** Paris · founded 2014](https://millionrounds.com/startup/rencontreunarchi-com)
- [**FOR ME LAB** Paris · founded 2016](https://millionrounds.com/startup/for-me-lab)
- [**exndo architectures** Lyon · founded 2006](https://millionrounds.com/startup/exndo-architectures)

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