Circular Economy Startups

Steeper Energy develops core technologies and engages in commercial project development, with a team of scientists and engineers working from locations in Denmark and Canada.

1 investor

Stell develops AI systems for complex environments, focused on computer vision that interprets visual data.

1 investor

Stella provides transfer station management, transportation, loading, and leachate services for waste operators across the United States, handling bulk liquid and solid hauling such as leachate, sludge, organics, and recycling residuals. Founded in 1992, it manages over 100 transfer station locations nationwide and processes more than 800,000 tons of waste per month.

1 investor

Stella McCartney is a luxury fashion brand offering apparel, sportswear, and vegan bags made from responsible and vegan materials, with products handcrafted in Italy. Its lines include seasonal collections and a collaboration line with adidas.

1 investor

Still Good transforms food industry by-products and residues into higher-value ingredients through a process spanning initial assessment, R&D recipe development, and finished product creation. It serves businesses in B2B, B2B2C, and hospitality/restaurant/institutional (HRI) channels, offering upcycled ingredients under the client's brand or as Still Good products.

1 investor

Stio designs and manufactures premium technical apparel for mountain athletes and outdoor enthusiasts. The company focuses on high-performance gear for activities like skiing, mountaineering, and river sports, emphasizing durability, fit, and functionality.

1 investor

Stocklear is a B2B marketplace that helps retailers and brands digitalize the sale of excess inventory and unsold stock. The platform enables buyers to purchase bulk lots of overstocked merchandise.

1 investor

Stoked Plastics develops recycled plastic material from collected ocean waste, particularly water bottles, for use in injection-molded products. The material is marketed as a sustainable alternative to virgin plastic for manufacturers seeking to meet ESG commitments and environmental responsibility goals.

1 investor

Stolle Machinery manufactures and services equipment for the metal can manufacturing industry, supplying new machinery, OEM spare parts, field support, and machine rebuilds. It serves canmakers worldwide with a focus on aluminum canmaking technology and sustainability.

1 investor

Storey is a virtual closet app that digitizes users' wardrobes to make clothing more wearable, shareable, and re-sellable. The platform enables resale and creative reuse of clothing to reduce fashion waste and promote a circular economy.

1 investor

Stork Exchange is a secondhand baby gear marketplace that sells returned, overstock, and lightly used products at discounts up to 70% off retail. The company serves budget-conscious parents seeking affordable alternatives to new baby gear while reducing waste.

1 investor

Linear Buddy is a thermoplastic elastomer safety product designed for site operations that resists damage and maintains durability through multiple reuse cycles. The product addresses workplace safety while supporting circular economy principles through full recyclability at end of life.

1 investor

Sugeo (오늘수거) operates a Korean on-demand waste collection app that picks up household waste—leftover delivery food, old clothes, broken small appliances, used cosmetics—from customers' doorsteps for a per-weight fee. Collected items are sent to its own sorting facility where they go through a four-step process of sorting, separating, washing, and classifying to be turned into recyclable material.

1 investor

Sulvaris develops proprietary nutrient delivery technologies and modular fertilizer production systems that enable producers, distributors, and retailers to create higher-value products from underutilized materials. The company serves the agricultural and fertilizer industry by transforming waste streams and off-spec materials into high-performance fertilizers while improving productivity and environmental outcomes.

1 investor

Sumitomo Chemical Co., Ltd. is a chemical company that develops and distributes chemical products and materials globally.

1 investor

The Summa Foundation is an independent charitable foundation that uses catalytic grants and recoverable impact investments to de-risk and scale early-stage solutions to social and environmental challenges. It focuses on nature-based solutions, sustainable food, circularity, energy transition, and tech-enabled resilience, operating globally in connection with Summa Equity.

1 investor

A materials trading company specializing in carbon and refinery products for industrial applications including steelmaking, aluminum smelting, and cement production. The company supplies petroleum coke, coal tar, graphite electrodes, refractory materials, and related products domestically and internationally.

1 investor

Sunset Renewable Asset Management develops mobile technology and processes to recycle and reclaim end-of-life materials from solar panels, wind turbines, and battery energy storage systems. The company serves renewable energy asset owners, developers, manufacturers, and operators across Canada and internationally.

1 investor

SUPASO manufactures insulating packaging made from recycled paper for temperature-sensitive and impact-sensitive shipments across food, pharmaceuticals, and specialty goods industries. The company offers customized, certified climate-neutral solutions designed for cold chain logistics.

1 investor

Superbin builds recycling infrastructure by redesigning waste sorting, collection systems, and logistics so discarded materials can be reused as raw materials. The company focuses on establishing a circular economy in South Korea.

1 investor

Surpluss operates a cross-border platform that connects sellers with a global network of buyers to manage and liquidate excess inventory. It targets businesses looking to sell surplus stock and reach new markets without disrupting existing supply chains.

1 investor

The Sustainable Agave Company makes single-use foodservice items, such as plastic alternatives, from upcycled agave waste generated by the tequila industry combined with bio-resin. It sells to businesses in the hospitality and food service sectors through wholesale and distributor channels, with agave operations in Jalisco, Mexico.

1 investor

A company that presents corporate policies aligned with its stated values around environmental stewardship, sustainability, and education.

1 investor

Sustonable produces engineered stone and concrete surfaces for interior design and construction applications. The company offers a range of branded decorative finishes including terrazzo, limestone, concrete, and composite materials.

1 investor