Circular Economy Startups

Seep sells microplastic-free household cleaning essentials, including sponges, made from renewable materials designed to be compostable or recyclable. The UK-based, female-owned B Corp markets its products to environmentally conscious consumers.

1 investor

SelecTech manufactures interlocking, adhesive-free commercial flooring made with recycled plastics, including ESD/static-control flooring for mission-critical environments such as manufacturing sites, labs, and cleanrooms. Its product lines include StaticStop, FreeStyle, and Place N' Go flooring.

1 investor

Select Water Solutions provides end-to-end water and chemical management services for oil and gas operators, including water infrastructure, logistics, and specialty chemical technologies across unconventional basins in the United States. The company operates water treatment facilities, disposal wells, and chemical manufacturing operations to support oilfield operations.

1 investor

Selev Biogroup provides integrated waste management and circular economy solutions for biosolids across hospitality, retail, food production, and meat processing sectors. The company helps organizations demonstrate environmental responsibility while responsibly managing organic waste streams.

1 investor

SELLIT9 provides a software platform that enables fast, frictionless trade-ins of used items, connecting sellers with merchants and brands across North America. The platform handles valuation, offers, and same-day payouts while diverting used tech from landfills.

1 investor

Semiexact manufactures steel brackets and hardware for DIY bed frames that customers assemble with their own wood, emphasizing modular design that adapts to multiple bed sizes. The company targets woodworkers and consumers who prefer to build their own furniture with minimal tools.

1 investor

SemiTorr is a distributor of high-purity components and equipment for semiconductor manufacturing and industrial applications, including valves, pumps, filters, and specialized instrumentation. The company serves the semiconductor and industrial sectors through multiple distribution locations across the United States.

1 investor

SemperCycle converts mixed plastic waste into chemical feedstocks like methanol and syngas through patented gasification technology for use by the chemical industry. The company enables circular pathways for difficult-to-recycle plastics that would otherwise be incinerated or landfilled.

1 investor

Eatsens produces roasted mealworms as an edible insect protein product, marketed as a sustainable alternative to conventional meat with significantly lower environmental impact.

1 investor

Sensmet develops online process analyzers for continuous monitoring and control of liquid samples in industrial applications. The company's patented Micro-Discharge Optical Emission Spectroscopy (µDOES®) technology enables multi-metal analysis of aqueous samples, with critical applications in battery metal monitoring during production and recycling.

1 investor

Sensoneo provides hardware sensors, software platforms, and consulting services for digital waste management and circular economy solutions. The company serves municipalities, industrial facilities, and countries implementing deposit return schemes and waste collection optimization across 90+ countries.

1 investor

Sensorita provides real-time sensor and fill-level monitoring for waste management companies, tracking container location, fill levels, and inventory across depots. Its platform automates customer ordering, route optimization, and proactive alerts for waste producers and haulers.

1 investor

Sentara Group (formerly Nutrition Technologies) produces protein, oil, and organic fertilizer from Black Soldier Fly larvae using a zero-waste tropical production model, serving the pet food, livestock, and aquaculture feed sectors. Founded in 2015 in Vietnam, it operates a production plant, laboratory, and office in Johor Bahru, Malaysia and ships to Asia, Europe, and South America.

1 investor

Sequent manufactures and distributes reusable totes available at over 38,000 retail locations across the United States, selling over 100 million units annually to consumers seeking sustainable alternatives to single-use bags.

1 investor

SERAPLANT GmbH operates a patented phosphorus recycling process that recovers nutrients from municipal sewage sludge for use in agriculture. The method aims to improve phosphorus efficiency in farming and meet regulatory requirements for phosphorus recovery from sewage sludge taking effect in 2029.

1 investor

SG Enviro provides industrial water and wastewater management solutions using an Engineering, Procurement and Construction (EPC) approach, covering design, build, retrofitting, and operation of treatment, reclamation, sludge, biogas, and energy recovery systems. It serves petrochemical, oil & gas, renewable energy, food & beverage, manufacturing, and pharmaceutical clients across Southeast Asia, backed by an in-house treatability and analytical laboratory.

1 investor

Sharefox provides digital infrastructure and software solutions that enable businesses and entrepreneurs to launch and operate rental services efficiently. The company supports the circular economy by helping rental operators reduce manual processes, improve sustainability, and scale their operations.

1 investor

Shark Solutions recycles post-consumer PVB (polyvinyl butyral) from windshields and laminated architectural glass, operating recycling factories in Europe and the USA that convert the waste into sustainable polymers for industrial uses such as carpet backing, paints, coatings, and sound dampening. It serves manufacturers seeking recycled raw materials to lower emissions and build Cradle-to-Cradle certified products.

1 investor

Sharps Medical Waste Services provides compliant medical, pharmaceutical, and hazardous waste management solutions for healthcare generators, from small clinics to large hospital systems, through flexible mailback and pickup services. The company has served over 50,000 customers nationwide since 1994, focusing on cost-effective, regulatory-compliant waste disposal.

1 investor

Shea Care Naturals makes premium skincare amenities from Vitellaria Nilotica shea butter sourced in Northern Uganda, offering custom formulations and refillable, zero-waste packaging. Its products are aimed at hospitality providers looking to enhance the guest experience with locally sourced, sustainable amenities.

1 investor

ShearWorx provides end-to-end scrap metal processing services, handling strategic planning, cutting, hauling, and the staffing and management of operator teams. It serves scrap industry clients of any size, scaling its equipment and crews to each project.

1 investor

Sheep Inc. designs and sells merino wool knitwear, including hoodies and t-shirts, emphasizing durability, natural performance properties, and regenerative sourcing. The company targets consumers seeking long-lasting, sustainable clothing alternatives to fast fashion.

1 investor

Shelfion provides microbiological testing and software solutions to food businesses for extending product shelf-life and reducing waste. The company helps food manufacturers optimize food safety and sustainability through science-backed insights and test kits.

1 investor

ShinSale sells second-hand tires, giving used tires a second life, and promotes reuse and conscious secondary consumption. The company highlights reduced CO2 emissions from its recycling activity.

1 investor