Greentown Labs

Andros Innovations manufactures reactors that reduce the cost and energy consumption of ammonia manufacturing.

BlueShift is a climate technology company that specializes in electrochemical processes. It develops systems to capture carbon dioxide directly from the ocean and convert industrial waste into valuable minerals, such as nickel and carbonates. This process not only provides sustainable sources for these materials but also significantly reduces atmospheric carbon, contributing to climate change mitigation.

AtmoSpark provides water to those with limited access. They want to make sure that access to clean, drinking water is never a concern to anyone and they want to lead the way for social impact driven tech ventures.

Axis Sky Renewables is a company dedicated to harnessing wind power for a sustainable energy future. It specializes in manufacturing vertical-axis wind turbines, which are designed with features like keel-stabilized rotation, tension leg platform mounting, and compact spacing to reduce installation costs and increase offshore power density. The company's turbines are intended to provide a sustainable and efficient source of energy.

Active Surfaces, a Massachusetts-based company, specializes in commercializing ultra-thin-film solar technology developed at MIT. Its core business involves creating flexible, lightweight solar panels that can be seamlessly integrated into everyday materials and surfaces, revolutionizing the conventional energy sector. The company's innovative manufacturing approach significantly reduces production costs, making solar power more accessible and affordable. This technology presents a transformational opportunity for semiconductor and electronics manufacturing, driving down costs for both module production and installation. By enabling virtually any surface to generate power, Active Surfaces aims to accelerate the transition to a cleaner, more sustainable future.

Carbon Upcycling is a carbon technology company focused on decarbonizing hard-to-abate industries through its patented technology. This innovation allows for the permanent storage of carbon dioxide in industrial byproducts and minerals, effectively transforming them into high-performance alternative materials for cement and concrete. By doing so, Carbon Upcycling aims to significantly reduce the carbon footprint of industrial processes while diverting materials from landfills, thereby supporting a circular economy. The company has garnered international recognition for its advancements, being awarded the Carbon XPrize’s X-Factor, named NRMCA’s 2023 Innovative Company, and included in Cleantech Group’s Global Cleantech 100 and Foresight 50’s Canada’s Most Investable Cleantech Ventures.

Hempitecture develops sustainable building materials using natural fibers like hemp. Based in Idaho, USA, it manufactures products for energy-efficient construction, benefiting both people and the environment.

Puro Renewables converts biowaste into sustainable, carbon-negative bioplastics, aiming to significantly reduce plastic waste and environmental impact.

ZS2 Technologies specializes in the creation and production of advanced building technologies, particularly prefabricated structural panels and cementitious building materials. The company is dedicated to enhancing building performance through its innovative construction solutions, which include fire-rated, non-toxic, and low-carbon materials. By focusing on research and the acceleration of construction technology adoption, ZS2 Technologies aims to help its customers reduce operating costs and shorten construction timelines.

Endeavor Composites specializes in producing non-woven reinforcing fiber mats designed for advanced composites manufacturing. Utilizing both virgin and recycled fibers, the company's unique process enables zero waste solutions, ensuring defect-free, fully isotropic mats with consistent quality. This innovation caters primarily to the automotive industry, significantly reducing production waste and manufacturing costs.

Lobster Robotics specializes in developing lightweight, low-cost robots for visual surveying in offshore wind farms. Their technology enables quick, affordable site assessments, reducing surveying costs and supporting the development of offshore renewables.

HyperKelp develops ocean data technology for early hypersonic threat alerts and multi-domain awareness in the maritime environment. Its kelp-smart buoy platform houses payloads at sea and collects real-time data from cameras, microphones, and other sensors, delivering information to surface users. The system analyzes hypersonic sound characteristics and other signals to enable early detection, with weather or weak signals not interfering. The technology supports a distributed mesh network for data collection across the ocean and provides an API to transmit data from distant locations, enabling clients to monitor overhead hypersonic threats from the maritime layer. HyperKelp markets a cost-effective alternative to satellite-based systems by delivering warnings and situational awareness for naval, defense, and security operators.

FutureOn is a company specializing in visual engineering solutions for the oil and gas subsea sector, having evolved from Xvision, a division of the EXP group with over 15 years of industry experience. The company has developed a collaborative platform that focuses on field design and application programming interfaces, allowing for seamless integration of backend systems and offshore engineering software. This platform enhances field planning, design, and activity scheduling, thereby helping energy companies improve their workflow processes and achieve better business outcomes. FutureOn's innovative approach aims to optimize operations within the subsea domain, making it a valuable partner for clients in the energy industry.

Developer of visual inspection robots designed to create high-quality images of underwater surfaces for industries exposed to marine environments.

SeaDeep employs AI to revolutionize underwater imaging. Its platform enhances real-time assessment of marine environments and structures, offering unprecedented fidelity.

Dioxycle develops electrolyser solutions that convert captured carbon dioxide into valuable chemical products. Its technology enables businesses to treat carbon dioxide as a resource, reducing reliance on fossil feedstocks and lowering industrial emissions.

Gaia AI is a startup applying perception AI technology from autonomous vehicles to revolutionize forestry management. It uses sensors and AI to collect and analyze data for timber harvesting, carbon projects, ecosystem services, and wildfire risk assessment.

Innovator Energy specializes in advanced heat transfer, cooling, and heating technologies while also focusing on carbon conversion and mitigation solutions. The company has developed innovative technology that effectively separates carbon dioxide from emissions produced by various industries, including power generation, cement production, biogas purification, metal refining, and wastewater treatment. This technology can be integrated into existing systems to convert CO2 emissions into clean natural gas, thereby allowing users to transition from fossil fuels to high-performance, zero-net carbon fuels derived from carbon dioxide. Through its pioneering approaches, Innovator Energy aims to address environmental challenges and promote sustainable energy practices.

ALLY Energy is a developer of an artificial intelligence-driven platform that connects energy and climate companies with talent seeking purpose-driven careers. The company offers a marketplace designed to facilitate connections between diverse candidates and job opportunities in the energy and climate sectors. By focusing on inclusivity, ALLY Energy aims to bridge the gap between employers and underrepresented talent pools, including individuals from various genders, ethnicities, generations, and backgrounds, such as veterans and neurodiverse individuals. This approach supports an equitable energy transition by enabling firms to build a more diverse and capable workforce for the future.

Black Mountain Resources is a global metals mining company specializing in managing projects from inception to completion. It focuses on extracting key materials such as nickel, copper, and cobalt for lithium-ion battery production, aiming to minimize carbon emissions throughout the mining process.

Varea Energy focuses on advancing geological hydrogen as a sustainable energy source by identifying and quantifying hydrogen reserves through existing seismic data. The company operates at the intersection of traditional gas exploration and advanced data analytics, aiming to support the decarbonization of the transportation sector. Varea Energy provides a comprehensive approach to facility management, incorporating data analytics and engineering services. Its offerings include energy assessments and feasibility studies tailored to enhance sustainability and reduce operational costs for commercial and industrial facilities. In a rapidly expanding green energy market, Varea Energy is committed to increasing the utilization of hydrogen fuels.

Triton GHG Environmental Services creates mobile skid-mounted units that eliminate the need for diesel, monitor, quantify, and significantly reduce greenhouse gas emissions at oil and gas drilling sites, LNG facilities, compression stations, and processing plants.

Founded in 2017, Revterra specializes in developing flywheel energy storage systems for industrial and utility-scale applications. Its patented technology uses passive magnetic bearings to enable low-power consumption at high speeds, facilitating the storage of renewable energies like wind and solar.

Ennuity Holdings provides residential energy consumers with a subscription for electricity from a real solar farm, allowing customers who don't have a suitable roof for their own solar panels to save on their energy bills while leaving a lasting environmental legacy for the planet.

Skylark Wireless designs and manufactures next-generation wireless systems focused on software-defined radio equipment for research, development, and rural broadband. The company develops SDR-based platforms with patented multi-user beamforming and MIMO technologies that enable long-range, non-line-of-sight connectivity in fixed and mobile environments, increasing coverage and spectral efficiency while reducing interference. Its product line includes end-to-end rural broadband solutions, SDR front ends, radio cards, and related extension modules, as well as custom PCB design, fabrication, and calibration services. Originating as a Rice University spin-out, Skylark aims to bridge the digital divide by delivering affordable broadband to underserved areas and supporting universities and laboratories with advanced wireless platforms. The company emphasizes scalable, software-driven systems designed for practical deployment and broad accessibility, serving research institutions and commercial customers alike.

ClearTrace is a software company that provides automated energy and carbon accounting via a blockchain-enabled cloud platform. Its SaaS solution creates verifiable digital records of energy usage and tracks third-party energy supply, financial power purchase agreements, demand response, and behind-the-meter energy assets, supporting reporting, auditing, and compliance across the energy supply chain. The company serves renewable energy suppliers, corporations, and commercial real estate owners, helping to establish a single source of truth for decarbonization claims and reduce greenwashing. Founded in 2017 and based in Austin, Texas, ClearTrace develops digital infrastructure and immutable data representations to measure and verify real-world energy emissions, enabling clients to pursue sustainability and financial goals.

Revolution Turbine Technologies generates reliable, zero-emission electricity from excess pressure in gas production, transmission, and distribution systems. It targets a global market exceeding $10 billion, with potential carbon footprint reduction of over 10 gigatonnes per year.

Katz Water Technologies purifies water using streamlined simplified equipment that can utilize waste energy. Its technology is able to purify produced water inside streamlined equipment that combines a gas burner with a modified heat exchanger. The company is based in Houston, Texas.

Veloce Energy specializes in energy storage and infrastructure solutions designed to facilitate the electrification of transportation. The company offers a modular and scalable battery energy storage system along with a flexible above-ground installation system, which streamlines the design, construction, and operation of electric vehicle charging stations. Veloce Energy's innovative ARGOS software platform enhances these systems by providing a user-friendly interface for secure transactions and operational intelligence. This technology addresses challenges related to connecting large loads at the grid edge, significantly reducing costs and development time for EV charging stations by over 50%. Additionally, Veloce Energy enables distributed storage deployment and introduces new financing models such as charging as a service, thus enhancing the overall efficiency of electric vehicle infrastructure.

Quantum New Energy is a technology company focused on facilitating the transition to sustainable energy. It develops a platform that optimizes energy efficiency, reduces costs, and lowers carbon emissions by transforming unused data into actionable insights. The platform, designed with secure remote data access and integration of human factors, also streamlines Environmental, Social, and Governance (ESG) reporting, making carbon reduction more relatable and cost-effective for clients.

Eclipse Solar Projects is a development firm that finances, operates, and owns utility-scale solar projects in North America using cutting-edge technology and potential battery storage operations.

Applied Bioplastics develops bioplastic products to reduce petroleum dependency by providing affordable high-grade recycled and plant-based plastic alternatives. The company sources sustainable plant matter from developing nations to lower costs without sacrificing quality, addressing the economic barriers to adopting recycled plastics. Its materials combine plant fibers with standard, recycled, or biobased polymers and can be injection molded or extruded into a range of items, enabling industries to substitute petrochemical feedstock with carbon-negative plant material and helping reduce carbon emissions and habitat destruction associated with traditional plastics.

Terrapin Geothermics is a developer of emission-free energy projects focused on harnessing heat to create value for various industries. The company specializes in generating clean, baseload electricity and heat from industrial waste heat and deep geothermal resources. By mapping available waste heat and matching it with advanced technologies, Terrapin helps industries optimize their processes while contributing to sustainability goals. The company's approach includes building robust financial models to support investment decisions, positioning its clients to thrive in a net-zero world amid fluctuating commodity prices and increasing carbon regulations. Through the use of renewable energy from waste heat recovery and geothermal applications, Terrapin Geothermics enables its partners to enhance their environmental, social, and governance (ESG) profiles.

Footprint is an educational platform. They aim to become the new international standard in climate education and mitigation tools. They created an application to empower individuals, schools, and corporations to track and reduce their carbon footprints. They also provide lesson plans, slide decks, lecture notes, videos, and the virtual interface needed for students. Footprint offers your classroom incentive packages to enhance learning and participation rates.

Syzygy Plasmonics, Inc. is a Houston-based company that specializes in the design, development, and manufacturing of photocatalytic reactor systems for industrial chemical reactions. Founded in 2017, the company focuses on creating reactors that facilitate the generation of fuel cell quality hydrogen from ammonia, specifically for small-to-medium-scale applications. These advanced reactors operate at significantly lower temperatures than traditional chemical reactors, allowing for reduced maintenance costs and the ability to quickly start or stop production. By utilizing light as an energy source, Syzygy Plasmonics enables the integration of renewable electricity into chemical manufacturing, contributing to the decarbonization of various industries and supporting the on-site production of ultra-low-cost hydrogen gas for fuel cell vehicles.

Applied Gaia specializes in the production of biochar, a clean and odorless material derived from waste biomass. This process, known as pyrolysis, transforms waste that would otherwise be burned or landfilled into a valuable product. Biochar, when added to soil, can reduce the need for chemical fertilizers and enhance filtration methods, thereby promoting sustainable agriculture.

Topl is a blockchain-based technology company that enables organizations to monetize ethical and sustainable practices by recording verified impact on a transparent, auditable ledger. It provides a decentralized protocol and accompanying services designed to build an impact technology economy, allowing enterprises to prove and monetize their positive impact as an asset across industries and borders. The Topl platform offers blockchain infrastructure, a blockchain for impact verification, and hosted tooling that simplifies interaction with the network, including supply chain certification and related services. By combining cross-border projects with verifiable impact data, Topl helps brands unlock value from social and environmental programs while providing a scalable solution for impact monetization.

Excipio Energy is a company that specializes in offshore renewable energy, offering a unique solution that combines multiple renewable energy sources - wind, wave, currents, Ocean Thermal Energy Conversion (OTEC), and power-to-fuel - on a single floating platform. Their services aim to make energy more profitable, safe, and reliable, while also reducing development costs by leveraging existing offshore infrastructure. They provide comprehensive consulting services, including technology evaluation, resource assessments, cost estimation, and regulatory guidance, to help energy producers navigate the offshore renewable energy landscape.

Cemvita employs synthetic biology to develop cost-effective solutions inspired by nature. Its CO2 Utilization platform mimics photosynthesis to produce nutrients, pharmaceuticals, and industrial chemicals, facilitating sustainable energy transition.

Seasats specializes in autonomous ocean vehicles designed for remote monitoring and data collection. Their vehicles serve defense and commercial clients, offering cost-effective alternatives to traditional methods.

Equitable Energy is a multi-brand cause-marketing platform that encourages consumers to drive carbon neutral, accelerates the deployment of sustainable energy solutions, and encourages the adoption of zero-emission vehicles in a persuading, practical, and reliable way.

ClearValue Technologies is a water chemistry, biology, and thermodynamics-based technology company bringing a clear value to every product.

SolBid is a technology platform specializing in Commercial and Industrial clean energy projects. It offers an AI-powered development platform designed to simplify and accelerate the creation of solar projects for businesses.

HYGEN is an innovative company that specializes in developing home fueling appliances designed to enhance the use of natural gas vehicles (NGVs). By utilizing its patented liquid piston gas compression technology, the company offers a supercharger that allows users to refuel gas-powered vehicles at home or in the office within just three minutes. This technology addresses challenges in the NGV market by transforming the existing gas distribution grid into a decentralized fueling infrastructure. HYGEN's appliances not only eliminate maintenance and operational inefficiencies but also extend the service life of gas compression systems and significantly reduce the total cost of ownership. Through its solutions, HYGEN enables gas utilities to enter the transportation fuel market by providing clean and affordable fuel options directly to consumers, thus modernizing the perception of NGVs and promoting a more appealing alternative to conventional fueling methods.

Trellis Air is a manufacturer specializing in energy-efficient HVAC technology. The company produces dehumidifiers that utilize a high-performance, low-cost membrane and a novel vacuum pump system, offering substantial energy savings compared to traditional methods. This innovation enables building operators and consumers to manage humidity more sustainably and reduce air conditioning costs.

Heliotrope Photonics is a innovative coating technology enhances solar-panel performance by transforming wasted sunlight.

Studio 3E8 is a technology company that specializes in metal 3D printing. It offers a platform that significantly enhances accessibility to this technology and reduces costs. The company's innovative solution integrates hardware, software, and materials to streamline the manufacturing process, enabling engineers to efficiently create metal parts for both rapid prototyping and end-use production. This transformation in manufacturing aims to reduce complexity and make metal 3D printing more accessible and affordable.

NeuroBionics is developing advanced neural interface technology. Its key innovation lies in microscale, flexible bioelectronic fibers that combine electrical, chemical, and optical capabilities to sense and modulate biological environments. This enables researchers and medical professionals to enhance therapeutic interventions and develop novel treatments for neurological disorders.

Dottir Labs specializes in developing spectroscopy sensor technology tailored for aqueous environments. This technology detects and measures nutrients, metabolic markers, and both organic and non-organic waste products in real-time, empowering clients to achieve sustainability through data-driven insights.

NET Offset is a company focused on commodity trading and focus on financial energy markets.

Alkemie is a materials company with proprietary technology that produces tailored graphene.

Inductive Robotics specializes in providing a scalable, cost-effective electric vehicle (EV) charging solution for parking lots. Their robotic charging system optimizes existing infrastructure, eliminating the need for expensive upgrades, and offers a flexible, subscription-based service for parking lot operators.

Loop CO2 specializes in transforming carbon dioxide into valuable products like cosmetic oils, adhesives, and thermoplastic elastomers. This innovative process enables clients to minimize their environmental impact by adopting eco-friendly alternatives.

Sweetch Energy develops innovative power harvesting technology that generates electricity by exploiting the difference in water salinity, utilizing a proprietary filtration system.