Circular Economy Startups
1,781 companies tagged Circular Economy, with their investors and founders.
The Seam offers specialist repair and alteration services for clothing, shoes, handbags, and knitwear, matching customers with a UK-wide network of skilled Makers. It serves consumers seeking garment and accessory repairs across the UK.
2 investors
Seaqure Labs develops mycelium-based protein for animal feed, designed as a sustainable alternative to soy and conventional proteins. The product reduces carbon emissions, water use, and land use significantly while utilizing industrial byproducts in a circular production process.
2 investors
Sedron develops technology that converts biosolids and manure into carbon-negative commodities and clean water at lower cost than traditional methods. It operates in the waste upcycling and resource recovery space.
2 investors
Selency (formerly Brocante Lab) is an online marketplace for vintage, antique, and secondhand furniture and décor, offering items curated by professional sellers. The platform lists over 300,000 products moderated for quality, spanning design furniture, scandinavian pieces, art deco items, and decorative objects.
2 investors
Seloxium develops a metal recovery and refining technology (branded "Selectal") used for tailings reprocessing, wastewater treatment, bulk metal recovery, and high-purity refining. It targets recovery of metals such as scandium with an emphasis on higher recovery rates, processing speed, and metal purity.
2 investors
Sheltersuit Foundation designs and manufactures multifunctional products, such as a wind- and waterproof jacket with attached sleeping bag, that provide immediate shelter to people experiencing homelessness, refugees, and disaster victims. Products are made from upcycled materials and distributed through partner aid organisations.
2 investors
Shit2Power builds a patented containerized system that converts dewatered sludge on-site into electricity, heat, and phosphorus-rich mineral ash through drying and thermochemical gasification. It serves municipal wastewater treatment plants and industrial operators (e.g. food factories, paper mills, biogas plants) primarily across the EU, replacing sludge transport and disposal.
2 investors
Silvis Materials develops a bio-based, patent-pending adhesive binder derived from sustainable cellulose that replaces petroleum-based adhesives in building products and packaging. The material reduces carbon emissions by up to 80% in building products and up to 40% in packaging while enabling recycling of previously unrecyclable materials.
2 investors
Sironix Renewables is a Seattle-based manufacturer of plant-based, high-performance molecules and surfactants made from agricultural waste, intended to replace petrochemical ingredients. It serves consumer product manufacturers and formulators in industries such as personal care, cleaning, and agriculture.
2 investors
Small Wonder makes waterless powder-based shampoo and hair care products that activate in a patented refillable bottle, marketed to consumers seeking salon-grade results with lower environmental impact. Its products feature a proprietary cold-pressed conditioning wax (SHINE37) and recyclable or compostable packaging.
2 investors
smol sells cleaning products designed to use less plastic, carbon and chemicals. The company positions its household cleaning range as a more environmentally conscious option for consumers' homes.
2 investors
Soil Safe recycles contaminated soil from construction projects, processing it into an engineered, permitted product with documented recycling. It serves construction customers and developers on both U.S. coasts through its recycling facilities.
2 investors
Solar Materials recovers silver, silicon, aluminum, copper, and glass from end-of-life solar modules using a patented thermomechanical process that recovers 99% of materials. The company serves solar park operators, engineering procurement contractors, and module manufacturers with WEEE-compliant recycling solutions across Germany.
2 investors
Sorted Tech offers a platform with three products for waste sorting and recovery: a photo-based tool that generates waste composition audit reports from uploaded pictures, and AI-powered robotic sorting arms (SortBot) that remove and redirect waste items on conveyor belts. It serves waste management companies, facility managers, and materials recovery facilities (MRFs) aiming to reduce labor reliance and improve recovery rates.
2 investors
Sortera uses patented AI-based sorting technology to separate automotive shredder metal scrap into alloys such as aluminum, copper, brass, zinc and stainless steel, producing low-cost feedstock for domestic manufacturing. The company operates automated sorting facilities aimed at recovering and reusing metals from end-of-life products, serving US manufacturers.
2 investors
Sortera uses patented AI-based sorting technology to separate automotive shredder metal scrap into alloys such as aluminum, copper, brass, zinc and stainless steel for domestic manufacturing. The company operates automated sorting facilities that turn recovered end-of-life metals into low-cost feedstock for US manufacturers.
2 investors
Sotira operates a platform connecting retailers, manufacturers, and distributors to secondary market buyers to offload and monetize unsold or perishable inventory. The company serves instant commerce companies and brands seeking to prevent surplus inventory from reaching landfills.
2 investors
Spoiler Alert offers data-driven software that helps companies with supply chains sell surplus and slow-moving inventory to reduce food and organic waste. It serves retail, CPG, and enterprise clients across North America, focusing on sustainability, efficiency, and profitability.
2 investors
SQIM is a material innovation company that uses living organisms and organic matter (biofabrication) to produce alternative materials. It operates two product brands: Ephea, which makes mycelium-based materials for fashion, and Mogu, which makes materials for interior design and architecture.
2 investors
STABL Energy builds modular stationary battery storage systems that use second-life batteries from electric vehicles, employing a modular multi-level converter (MMC) design that allows mixing modules of different health states and manufacturers. It serves commercial and industrial customers with off-grid and grid-support applications, including energy trading on the spot market.
2 investors
SuperGround develops a food processing technology that maximizes the utilization of fish and chicken in industrial food production, enabling food companies to reduce waste and emissions while creating sustainable products.
2 investors
SusPhos develops a phosphate recovery technology that converts phosphate-rich waste such as sewage sludge ash into commercial products including green alternatives for fertilisers and cement. It is building the SusPhos One plant, a first-of-its-kind 40 kton phosphate recycling facility in the Netherlands planned to be operational by 2027.
2 investors
Swaplanet is an online marketplace for buying premium brand items at lower prices with a focus on positive environmental impact. It ships across Greece with 2-4 day delivery and offers free returns.
2 investors
SYNOVA licenses and supplies proprietary technologies for molecular recycling of mixed plastic waste into base chemicals such as olefins and styrene, which can be used to produce new plastics with virgin quality. The company's waste-to-olefins process operates at conditions similar to conventional steam crackers and offers higher yields at lower costs compared to alternative plastic recycling options.
2 investors