FlexSea produces seaweed‑derived bioplastic pellets that are certified home‑compostable (EN13432) and can replace petroleum‑based polymers in injection molding, 3D printing, and cosmetic formulations. Using bacterial fermentation to extract the full biomass of cultivated seaweed, the company offers ready‑to‑process granules and custom formulations that integrate with existing manufacturing equipment while delivering a renewable, low‑carbon material footprint.
Funding
$1.6M raised to dateRaised to date based on public sources. This may differ from the amount the company actually raised and is based only on what is publicly available on the internet.

IUFounders
Product
Problem
Conventional plastic production relies on fossil resources and generates persistent waste, creating environmental and regulatory pressures for manufacturers seeking sustainable alternatives.
Solution
FlexSea develops seaweed‑derived bioplastic materials that replace petroleum‑based polymers in injection molding, 3D printing, and cosmetic ingredient applications. By employing bacterial fermentation and full‑biomass utilization, the company extracts a range of functional compounds from cultivated seaweed, producing compostable pellets that meet EN13432 home‑compostability standards. These materials are supplied as ready‑to‑process granules or custom formulations, enabling customers to integrate circular, low‑carbon plastics into existing manufacturing lines without major equipment changes. FlexSea also offers technical support for product development and scaling, helping clients achieve certified sustainability performance.
Target Audience
Primary customers are packaging manufacturers, consumer‑goods producers, and cosmetics formulators that require certified compostable plastics and sustainable material solutions for their products.
Features
- Seaweed‑based polymer pellets certified compostable under EN13432 (home compostability)
- Full‑biomass extraction process using bacterial fermentation to maximize material yield
- Compatibility with standard injection molding equipment and 3D‑printing filaments
- Customizable formulations for specific mechanical, barrier, or cosmetic functional requirements
- Biodegradable and renewable feedstock reduces carbon footprint and reliance on fossil plastics
- Supply chain transparency with traceable seaweed sourcing and circularity reporting