Cleantech Startups
5,222 companies tagged Cleantech, with their investors and founders.
BT Imaging builds machine vision systems for defect detection and quality inspection of photovoltaic wafers, cells, and modules, including back-contact, tandem, and multi-bus-bar configurations. Its inline inspection and reporting tools serve solar cell and module manufacturing lines.
3 investors
Burnt Island Ventures is a venture capital firm that invests in and supports startups building water-related technologies, with a focus on addressing water challenges tied to climate change.
3 investors
Cache Energy provides thermal energy storage systems that use thermo-chemical technology to store heat at 1,000°F for dispatch periods ranging from 1 to 1,000 hours, serving industrial and commercial customers needing long-term energy storage and heat electrification.
3 investors
Caelux develops perovskite-based solar technology and manufactures Active Glass solutions to improve solar energy efficiency, power output, and cost-effectiveness using advanced manufacturing and machine learning.
3 investors
Cajo Technologies develops laser-based marking solutions for product traceability without chemical additives, serving manufacturers in materials processing and industrial sectors. The technology reduces carbon footprint by 90% compared to inkjet or painting methods and offers payback periods under 8 months.
3 investors
Calectra develops electrified, high-temperature industrial heat systems designed to reduce costs and emissions for industrial applications. The company serves energy-intensive manufacturing and industrial sectors requiring decarbonized thermal solutions.
3 investors
Caracol develops large-scale additive manufacturing technology for industrial production, enabling companies in aerospace, automotive, architecture, marine, and railway sectors to produce advanced components more efficiently and sustainably. The company provides integrated turnkey solutions that enhance manufacturing flexibility, cost-effectiveness, and environmental performance.
3 investors
Carbo Culture develops carbon removal technology leveraging natural processes combined with advanced engineering to remove carbon dioxide from the atmosphere at scale. The company operates as a project developer focused on climate mitigation solutions for global carbon removal markets.
3 investors
C1 develops a homogeneous catalysis process and containerized reactor to mass-produce high-purity green methanol from non-fossil feedstock at low pressure and temperature, for the shipping and chemical industries. The company operates the Leuna100 pilot plant in Leuna, Germany to validate its technology.
3 investors
Carbon America is a carbon capture developer that manages the full CO₂ capture, transport, and storage value chain — from screening and development through construction, operation, and closure — for hard-to-abate industrial and power sector emitters. Its projects include Project Antheia, which develops geologic CO₂ storage for industries in Georgia and the Southeastern United States.
3 investors
CarbonBlue develops EcoLime, a fully electrified, patented lime production process that operates at ambient temperatures and uses low-quality waste feedstocks such as steel slag, quarry fines, and demolition waste. It targets industrial producers in steel, paper (Kraft process mills), and construction to reduce emissions, cut fuel reliance, and enable circular reuse of waste streams.
3 investors
CarbonBuilt makes low-carbon concrete masonry and hardscape products by replacing up to half the cement with its proprietary upcycled binder, reducing the carbon footprint of concrete production. It targets the construction materials market with products priced and performing comparably to conventional concrete.
3 investors
Carbonova uses a patented catalytic process to convert captured CO2, methane, and waste heat from manufacturing emissions into carbon nanomaterials. These net-negative nanomaterials are supplied to industries such as plastics/composites, lithium-ion batteries, and construction to improve material strength, durability, and performance.
3 investors
Cariqa operates a platform that connects EV charging operators and drivers directly, eliminating intermediaries to provide transparency and control in the charging market. The company provides infrastructure software for the electric vehicle charging industry.
3 investors
Cascade Biocatalysts develops engineered biocatalysts designed to be more cost efficient, reusable, and longer-lasting with a wider operating window and higher output. The company positions its biocatalysts as offering improved performance for industrial chemical and biological processes.
3 investors
Charge Robotics automates labor-intensive tasks in solar construction to address deployment bottlenecks as demand for solar energy grows. The company focuses on enabling scalable solar installation through robotics technology.
3 investors
CheckSammy provides waste diversion and recycling services with a technology platform that tracks materials from pickup to final destination, connecting businesses to a network of recycling and sustainability facilities. It serves enterprise clients across North America with chain-of-custody tracking, automated reporting, and ESG metrics.
3 investors
ChemFinity develops advanced chemical separation technologies for recovering critical minerals and other resources. The company aims to support a more secure domestic supply of these materials.
3 investors
Claros Technologies develops PFAS ("forever chemical") detection, analytical testing, and destruction technologies that eliminate PFAS at the source at commercial scale, serving PFAS manufacturers and companies facing environmental regulation and liability. It operates an ISO/IEC 17025 accredited laboratory offering analytical services and privileged legal assessments.
3 investors
CarbinX is a carbon capture device that connects to natural-gas heating appliances in buildings to capture and permanently sequester carbon dioxide as potassium carbonate, while also functioning as an economizer to recover waste heat. The company operates in the cleantech and climate solutions sector for building decarbonization.
3 investors
Closed Loop Partners is an investment firm focused on the circular economy, deploying venture capital, private equity, catalytic capital and private credit alongside an innovation center and an operating group that builds circular economy infrastructure. It works with global corporations, financial institutions, foundations, family offices, entrepreneurs and municipalities, primarily across the U.S.
3 investors
Colorifix uses engineered microorganisms to produce, deposit, and fix dyes on textiles through a biological fermentation process, aiming to reduce the environmental impact of textile dyeing. It develops and manufactures bioreactors and fermentation media for textile industry customers.
3 investors
Conry Tech develops HVAC technologies focused on energy efficiency and sustainability in climate technology. The company builds on its founders' background in cooling systems such as modular chillers and Turbocor compressors.
3 investors
Continuum Industries is an infrastructure technology company whose AI-powered platform, Optioneer, helps utilities and developers plan, scope, permit, and deliver linear infrastructure projects across water, gas, and energy. The enterprise software is aimed at supporting the transition to renewable energy and water and energy security.
3 investors