Circular Economy Startups

Biosynthetic Technologies manufactures biobased synthetic base oils called Estolides, derived from organic fatty acids in bio-derived oils, that serve as drop-in replacements for conventional lubricant base oils. Its products target industrial lubricants, metalworking fluids, grease, food grade applications, and personal care/beauty ingredients.

1 investor

Birl provides AI-powered, fully managed resale infrastructure that helps fashion brands recover revenue from damaged, returned, excess and unsellable inventory through triage, cleaning, listing, and resale distribution. It also runs trade-in programmes that convert existing customers into higher-value buyers, integrating with brands' ecommerce stacks.

1 investor

Bivalvia produces oysters (Crassostrea Gigas) for commercial sale, operating hatcheries and growing facilities across Portugal to supply quality marine products to customers and partners. The company focuses on expanding domestic oyster production and exports through vertically integrated operations spanning the full production cycle.

1 investor

Black Bull Biochar produces biochar, a carbon-rich soil additive made from biomass byproducts, for use in dairy farm manure management systems to improve soil health and productivity. The company also operates pyrolysis facilities that generate renewable heat as an alternative to fossil fuels for industrial sites.

1 investor

Blend Energy builds modular industrial thermolysis systems that convert mixed and contaminated plastic waste into circular hydrocarbon oils for use as secondary raw materials in plastics and chemical manufacturing. Its systems process a range of plastic types with minimal sorting and offer an optional CO₂ capture module, serving industrial chemical recycling and materials recovery.

1 investor

BlockTexx operates a commercial-scale textile recovery facility that recycles unwanted clothing and textile waste into new products, diverting them from landfill. Using its S.O.F.T. (separation of fibre technology) chemical process, the company serves agriculture, injection moulding, and building & construction markets through an end-to-end collection and remanufacturing ecosystem across Australia.

1 investor

Everbloom develops next-generation noble fibers derived from protein waste as biodegradable, recyclable alternatives to synthetic and animal-based textiles like cashmere, wool, and silk. It targets luxury fashion supply chains, partnering with textile mills to provide sustainable materials with lower land, water, and greenhouse gas footprints.

1 investor

Blue Eden CleanTech Solutions designs, builds, and services custom turnkey systems for recycling and wastewater treatment, including equipment to remove suspended solids, destroy complex organic compounds, and convert carbon waste into bio-energy. It serves industrial operators seeking resource recovery and reuse from complex and composite waste streams.

1 investor

BlueLabs produces water purification filters and eco-friendly water treatment materials from recycled oyster shells, addressing water contamination and circular economy challenges. The company transforms agricultural waste into high-value filtration products that remove heavy metals and reduce carbon emissions compared to traditional activated carbon processes.

1 investor

Blue Planet provides waste management technologies spanning the entire waste management value chain, including landfill remediation, waste processing, and refuse-derived fuel disposal. It serves organisations across Asia and other regions to support their transition to a circular economy and reduce waste to landfill.

1 investor

Blue Planet provides waste management technologies covering the entire waste value chain, including landfill remediation and waste processing, to help organisations transition to a circular economy. The company operates projects across Asia and other regions, focusing on decarbonisation, environmental sustainability, and zero waste to landfill.

1 investor

Blue Whale Materials recycles spent lithium-ion batteries—from consumer and EV batteries to production scrap—using proprietary processing to reclaim cobalt, nickel, and lithium into a Blacksand product for the electrified economy. Its subsidiary BW Energy & Innovation offers battery testing and evaluation services, and the company also provides collection and logistics solutions for end-of-life batteries.

1 investor

BlueChem is an incubator for sustainable chemistry, offering flexible workspaces, private offices, meeting rooms and equipped laboratories to start-ups and scale-ups developing chemical innovations. Located at Blue Gate Antwerp in Belgium, it operates through a partnership between industry, government and knowledge institutions with links to Flemish universities and research centres.

1 investor

Bob's Containers converts shipping containers into residential and commercial spaces. The company serves homeowners and business owners seeking affordable housing and commercial solutions.

1 investor

Bocoloco provides technology for packaging reuse and traceability, including a management platform (GEAR) and field traceability terminals (TTL, TCE) that track operational and financial flows of reusable packaging. It serves retailers, food-industry manufacturers, and other supply-chain actors to help them manage deposit systems and comply with French packaging reuse regulations (REP).

1 investor

An online and in-person used bookstore selling gently used books, CDs/music, and movies/DVDs, with bundle deals and bargain pricing for general readers. The company partners with schools, libraries, and nonprofits to keep media in circulation and reduce landfill waste, and operates as an independent Colorado-based shop.

1 investor

Boox provides custom-branded, sustainable packaging along with international product sourcing and fulfillment services for consumer brands. It handles supplier sourcing, quality assurance, compliance, logistics, storage, and shipping so brands can focus on brand building.

1 investor

Borro provides a reusable cup system for large venues such as sports stadiums, aiming to make cup reuse fast and reliable. The company works with clients like the football club Club Brugge to replace their prior reusable cup operations.

1 investor

BOSK Bioproducts develops, manufactures, and distributes biobased, compostable, food-contact certified PHA-based compounds and finished products under the REGEN™ brand as an alternative to petrochemical plastics. Its proprietary technology produces PHA (polyhydroxyalkanoates) from non-food-grade industrial byproducts for companies seeking to reduce the environmental impact of their products.

1 investor

Bottleplus makes a portable bottle that lets users carbonate water on the go by pressing a button and shaking, offering sparkling water without single-use PET bottles. The product is aimed at consumers looking for a reusable, more sustainable alternative to bottled sparkling water.

1 investor

La Bourse aux Livres is an online marketplace and consignment service for buying and selling second-hand books, where sellers send in their books and the company handles pricing, sales, and shipping. The service operates in France and Belgium and offers a smartphone app for instant book valuations.

1 investor

Bower is a smartphone app that uses barcode scanning and AI image recognition to help consumers identify household items and packaging and learn how to recycle them, rewarding proper waste sorting with cash and points through challenges and drop-off location finding. The Swedish company gamifies recycling for individual users worldwide and partners with brands such as Orkla to reward recycling.

1 investor

Boxbee rents reusable plastic moving boxes and offers on-demand storage where it picks up, stores, and delivers customers' items, with an online portal to manage inventory. It serves movers and households across California markets including San Francisco, San Jose, Los Angeles, Inland Empire, Orange County, and San Diego.

1 investor

Sort A Bricks offers an AI-powered service that sorts customers' mixed used LEGO® bricks, identifies which sets can be rebuilt, sources missing parts, and returns ready-to-build restored sets. The company targets consumer LEGO® enthusiasts, with an R&D center in Lithuania and customers in Western Europe such as Germany and France.

1 investor