Cleantech Startups
5,222 companies tagged Cleantech, with their investors and founders.
Cool Planet Technologies develops a membrane-based process for capturing carbon dioxide from industrial flue gas emissions, targeting industrial emitters including hard-to-abate sectors. The company designs, builds and sells carbon capture solutions to help companies meet net zero commitments.
3 investors
CoolIT provides liquid cooling systems for AI data centers, offering hardware, chemistry, and real-time monitoring for closed-loop cooling. Now part of Ecolab, the company targets operators of advanced data centers seeking to manage energy and water demands.
3 investors
CorPower Ocean develops wave energy converters that transform ocean waves into electricity through biologically-inspired technology. The company operates in the renewable energy sector, targeting commercial-scale wave energy deployment globally.
3 investors
EnergyBank develops a system to firm floating offshore wind at the turbine, enabling co-location of compute modules with power generation and avoiding grid connections through high-seas siting and direct ocean cooling. The company operates in the offshore wind energy and data center infrastructure space.
3 investors
Kwetta builds high-power EV charging infrastructure for constrained grids, combining a grid-connection and power-management platform (Prime) with charging dispensers (Sky) to enable megawatt-scale charging without major network upgrades. It serves bus depots, heavy truck fleets, and charge point operators.
3 investors
Cox Enterprises is a family-owned holding company, founded in 1898, with operations spanning automotive services, broadband and communications, greenhouse agriculture, clean technology, conservation, media/journalism, and outdoor adventure. It also invests in emerging technologies and startups aligned with sustainability goals.
3 investors
Crush Dynamics develops AI technology for the food and fermentation sectors, aimed at reducing energy use and improving ingredient production. The company operates in Canada with a focus on sustainable fermentation and ingredient manufacturing.
3 investors
CURA develops electrochemical technology to reduce the process CO2 emissions released during limestone calcination in cement production. The company targets cement producers with an upstream approach designed to integrate with existing plants rather than requiring material substitution or plant replacement.
3 investors
Deep Blue Biotech develops sustainable chemicals by re-engineering cyanobacteria to convert CO₂ into high-value molecules, using AI-driven metabolic modelling. Its products include an ocean-derived hyaluronic acid, targeting the cosmetics/ingredients and broader chemicals industry.
3 investors
DePoly develops a chemical recycling technology that converts unsorted, contaminated PET plastic waste into virgin-grade raw materials (PTA and MEG precursors) for producing new plastics without fossil fuels. It serves the plastics manufacturing industry and is based in Switzerland.
3 investors
Derapi offers a universal API that connects to distributed energy resources (DERs) such as solar, storage, HVAC, EV chargers, and appliances, replacing bespoke in-house integrations with a single connection. It serves DER software developers—including DERMS, VPP, energy management, and monitoring platforms—as well as DER device manufacturers.
3 investors
DexMat produces Galvorn, an advanced carbon material that combines high electrical and thermal conductivity with strength, light weight, flexibility, and recyclability as an alternative to copper and other metals. It targets industries including aerospace and defense, automotive and electrification, and energy and transmission for wire, cable, and conductor applications.
3 investors
Dexter Energy provides AI-driven power and price forecasting, from day-ahead to real time, to help asset-backed renewable and battery energy traders maximize traded volumes and reduce imbalance risk. Its developer-friendly API and machine learning models serve quantitative analysts, traders, and heads of trading managing renewable energy portfolios across European markets.
3 investors
EDEN provides an instant online quoting tool for residential HVAC contractors, generating heating and cooling load calculations, equipment selection, and applicable rebate and tax credit amounts to help contractors close sales. It combines weather, property, and equipment data and integrates federal, state, local, and utility incentives into customer-facing estimates.
3 investors
Echandia develops maritime battery systems for heavy-duty applications, offering ultra-fast charging, long cycle life, and support for hybrid and fully electric propulsion. Its products serve shipowners, operators, and defense customers, and it provides a design tool for configuring ship battery systems.
3 investors
Echion Technologies is a battery technology company that develops and commercialises XNO®, a niobium-based fast-charging battery anode material supplied to cell manufacturers worldwide. Its technology is deployed across industries including mining, AI datacentres, robotics, industrial energy storage, rail, and marine.
3 investors
Eclipse develops and optimizes battery energy storage systems (BESS), handling project development (site identification, permits, grid connection, installation) and real-time optimization of batteries on electricity markets. It targets the European electricity grid to support the growth of renewable energy.
3 investors
ECO2GROW provides direct access to green electricity from solar and wind farms for mid-market companies through a multi-buyer power purchase agreement model that bundles demand to achieve large-enterprise pricing. The company enables SMEs to reduce energy costs and carbon emissions while sourcing renewable energy with full traceability.
3 investors
ecobee makes smart home devices including smart thermostats and cameras, along with its eco+ software that delivers energy savings and demand flexibility for the electricity grid. The company focuses on comfort, security, and energy conservation for homeowners while supporting sustainability goals.
3 investors
Eeden converts textile waste into high-quality raw materials for virgin-grade textile fibers through chemical recycling technology. The company serves textile manufacturers seeking to reduce environmental impact and secure sustainable resources while meeting regulatory requirements.
3 investors
EIO Diagnostics develops a thermal sensor-based mastitis monitoring system for dairy farmers that detects udder health issues to reduce infections. The UdderHealth Mastitis system integrates into various dairy parlor styles to serve farms of all sizes.
3 investors
Electralith develops Direct Lithium Extraction and Refining (DLE-R) technology that produces battery-grade lithium hydroxide without water or chemicals, powered by renewable energy. The company targets lithium producers and battery manufacturers in the cleantech and energy sectors.
3 investors
Electric Fish builds products for a decentralized electric grid system to enable energy independence. The company operates in the energy and critical infrastructure sector.
3 investors
Electrochaea is a Power-to-Gas technology company whose patented biomethanation process uses a proprietary strain of archaea to convert CO2 and green hydrogen into grid-quality renewable e-methane. It licenses its technology to energy and industrial companies to produce low-carbon methane for gas grids and renewable fuel across multiple sectors.
3 investors