Werewool, a New York-based biotech specializing in protein-based textile fibers, raised $3.7 million in seed funding in May 2023. The round was co-led by Material Impact and Sofinnova Partners, two funds that keep doubling down on sustainable materials. The funding will enable the company, led by Chui-Lian Lee, to finalize its first commercial product: a spinnable protein fiber offering an alternative to the petroleum-based synthetic fibers that dominate the textile industry.
A biotech that mimics nature to reinvent fiber
Founded in 2017, Werewool is part of a wave of startups applying the principles of biomimicry to materials. The company uses proteins naturally found in marine organisms (jellyfish, corals) to produce fibers with intrinsic properties: structural color (no chemical dyeing), strength, elasticity, and moisture management. This approach removes several energy-intensive steps from the conventional textile cycle, most notably dyeing, which alone accounts for 20% of global water pollution according to the World Bank.
Werewool's process involves designing custom proteins through genetic engineering, producing them via microbial fermentation, and then spinning them into continuous fibers that can be used by the textile industry. The company claims compatibility with existing spinning equipment, which is a decisive argument for industrial adoption.
An industry under regulatory pressure
The timing of the funding round comes against a backdrop of tightening regulation. The European strategy for sustainable textiles, adopted by the European Commission in 2022, sets circularity and footprint-reduction targets to be met by 2030. In the United States, the New York Fashion Sustainability and Social Accountability Act, under review since 2022, would impose environmental reporting obligations on brands generating more than $100 million in revenue.
According to a McKinsey study, the textile industry accounts for between 4 and 8% of global greenhouse gas emissions, and synthetic fibers (polyester leading the way) make up roughly 60% of global fiber production. The textile bio-materials market, estimated at around $1.7 billion in 2023, is expected to exceed $6 billion by 2030, according to projections by Grand View Research.
Material Impact and Sofinnova: two convergent theses
The co-leadership of Material Impact (Carmichael Roberts' fund, based in Boston) and Sofinnova Partners (a historic European venture fund in biotech and sustainable industries) underscores the growing interest on both sides of the Atlantic in biotech-derived materials. Sofinnova Partners manages more than €2.5 billion in assets and has notably invested in Pivot Bio, Inotrem, and Affinia Therapeutics. Material Impact is known for its bets on Sila Nanotechnologies (batteries) and Embr Labs (thermal regulation).
For both investors, Werewool represents a deeptech bet with a long return horizon but significant potential for sector-wide transformation. The seed round size ($3.7M) remains measured and primarily funds R&D and pre-industrial scaling.
Direct competitors and benchmarks
- Modern Meadow: an American biotech developing biofabricated leather made from recombinant collagen.
- Spiber: a Japanese company producing Brewed Protein, a protein fiber commercialized with North Face and Goldwin.
- Bolt Threads: a pioneer of recombinant spider silk fibers, which pivoted to mycelium (Mylo) after running into scale-up difficulties.
- AMSilk: a German company producing biotech silk proteins for textiles and cosmetics.
The common challenge for these players is industrialization: scaling from grams to kilograms, then to tons, at a cost compatible with the constraints of both fast fashion and luxury. Bolt Threads shut down its Microsilk division in 2018 for lack of economic viability, illustrating how difficult scaling up can be.
Roadmap and use of funds
Werewool has indicated it will use the $3.7M for three operational priorities: developing its first commercial product (a spinnable protein-based fiber), building pilot production capacity, and expanding its scientific and industrial team. The stated goal is to sign partnerships with fashion brands as early as 2024-2025 for capsule collections, before a broader rollout.
The textile industry is known for its long validation cycles. A new fiber has to go through spinnability, weaving, wash-resistance, toxicity and consumer-acceptability testing — 12 to 36 months of evaluation before commercial adoption. Werewool will therefore need to demonstrate the robustness of its process quickly to convince the first major buyers.
What this means for the French ecosystem
Sofinnova Partners, a Paris-based fund, is acting here as a bridge between US deeptech and the European ecosystem. France is home to several competing or complementary startups: Fairbrics (polyester made from captured CO2), Resortecs (heat-dissolvable threads for textile recycling) and Pili (bio-based pigments). Sustainable materials are establishing themselves as an investment vertical in their own right, with amounts still modest but growing fast.
For brands shaping their brand strategy around sustainability, the arrival of fibers like those developed by Werewool will set new standards for product communication, grounded in scientific certifications rather than marketing claims. This is a space where editorial expertise and AI-powered data analysis can deliver differentiated value.
FAQ
How much has Werewool raised in seed funding?
Werewool raised $3.7 million in seed funding in May 2023, in a round co-led by Material Impact and Sofinnova Partners.
What does Werewool produce?
Werewool develops protein-based textile fibers designed through bioengineering. These fibers offer natural properties (structural color, strength, elasticity, moisture management) without resorting to chemical dyeing.
Who leads Werewool?
Werewool is led by CEO Chui-Lian Lee, who has run the company since its founding in 2017.
Who are Werewool's competitors?
Werewool competes with biotechs such as Spiber (Japan), Bolt Threads (United States), AMSilk (Germany) and Modern Meadow, all focused on biofabricated textile materials.
How big is the bio-based textile materials market?
The textile bio-materials market is estimated at around $1.7 billion in 2023 and could exceed $6 billion by 2030, according to projections from research firms such as Grand View Research.