Khosla Ventures
Khosla Ventures is a California-based venture capital firm founded in 2004 by Vinod Khosla. It provides capital and strategic guidance to startups across stages, focusing on technology-driven companies in areas such as artificial intelligence, climate and sustainability, enterprise software and services, fintech, digital health, medical technology and diagnostics, therapeutics, consumer products, and frontier technologies. The firm backs bold ventures with the potential to disrupt markets and improve lives, supporting companies from early to growth stages and working closely with entrepreneurs to apply science, technology and innovative business models. While primarily investing in North American technology companies, Khosla Ventures pursues opportunities globally and emphasizes experimentation and impact alongside financial returns. The firm also maintains related impact initiatives that support entrepreneurs addressing socio-economic challenges in emerging markets.
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Past deals in CleanTech
Mainspring
Series F in 2025
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
Resource Chemical
Venture Round in 2025
ReSource Chemical is a company based in Berkeley, California, focused on developing high-performance plastics derived from carbon dioxide. The company utilizes a proprietary bio-based platform to create chemicals that enable the production of environmentally friendly plastics with superior physical properties compared to traditional fossil fuel-based plastics. By converting CO2 into these innovative materials, ReSource Chemical aims to provide sustainable alternatives that do not contribute to environmental pollution.
Spiritus
Series A in 2025
Spiritus is a climate technology company specializing in direct-air-capture systems. Its innovative approach combines the Spiritus Sorbent and Carbon Orchard, offering a scalable, modular solution for low-cost carbon dioxide removal and sequestration.
LuxWall
Series B in 2024
LuxWall is a building materials company that designs and manufactures vacuum-insulated glass, a transparent insulation material that reduces heating and cooling losses and improves building energy efficiency. Its vacuum-insulated glass supports energy standards for commercial and residential buildings and uses technology aimed at enabling greater thermal performance. Founded in 2020 and headquartered in Ypsilanti, Michigan, LuxWall seeks to advance sustainable construction and has indicated a potential to reduce global carbon emissions by more than 0.5 gigatonnes per year, highlighting its environmental impact.
RedoxBlox
Series A in 2024
RedoxBlox develops thermochemical energy storage technology to decarbonize high-temperature industrial thermal processing and provide long-duration energy storage for the grid. The technology enables continuous high-temperature heat while integrating with existing infrastructure to replace natural gas combustion, supporting electrification and renewables deployment. It reduces carbon dioxide and nitrogen oxides emissions, enhances safety and resilience, and aims to lower total capital cost for industrial processors and power plant operators. By delivering scalable, long-duration heat, RedoxBlox helps industries leverage renewable energy and move toward low-emission operations.
Enzymit
Series A in 2024
Enzymit is a biotechnology company focused on revolutionizing global manufacturing through sustainable and efficient bio-production methods. It specializes in developing cell-free bio-production technology that aims to eliminate the inefficiencies and complexities associated with traditional bio-production. Enzymit employs artificial intelligence and deep learning algorithms to design novel enzymes, which serve as molecular machines capable of transforming abundant feedstocks into valuable products, including pharmaceuticals, cosmetics, food, and materials. The company’s small, modular bio-reactors facilitate this process, promoting resource independence while minimizing environmental impact. By moving away from conventional whole-cell methods to utilizing nature's elemental building blocks, Enzymit enhances cost-effectiveness, efficiency, and sustainability in bio-production, while also providing greater flexibility in product customization for various industries.
Fortera
Series C in 2024
Fortera is a company focused on developing innovative solutions for the cement and concrete industry with the aim of significantly reducing carbon dioxide emissions. It has created a process that captures industrial carbon dioxide emissions and mineralizes them to produce a more environmentally friendly form of concrete. This method not only addresses the substantial carbon footprint associated with traditional concrete production but also offers improved performance characteristics. By providing sustainable alternatives to conventional cement products, Fortera contributes to global efforts to mitigate climate change and enhance the environmental sustainability of construction practices.
Planted Solar
Series A in 2024
Planted Solar develops and deploys solar power plants using a rapid deployment platform that increases energy output per acre and accelerates project delivery. It combines development software, terrain-adaptive high-density racking, and automated construction to build flexible, all-terrain power plants. Through advanced site planning and logistics, the company aims to maximize land use and streamline solar development, enabling faster, scalable deployment of clean energy.
Glydways
Series B in 2024
Glydways is a South San Francisco-based company specializing in affordable autonomous transportation systems. It designs, manufactures, installs, and operates efficient, high-capacity mobility solutions that are environmentally friendly with zero greenhouse gas emissions.
Li Industries
Series B in 2024
Li Industries is a start-up focused on advancing lithium-ion battery recycling technologies. The company specializes in the recovery of valuable materials such as lithium, cobalt, and nickel from end-of-life batteries used in electric vehicles, consumer electronics, and other energy storage systems. By utilizing innovative direct recycling technology and a scalable electrochemical flow system, Li Industries aims to extract these essential metals efficiently and sustainably. This process not only reduces environmental waste but also supports the production of new batteries from recycled components. By optimizing the recovery and treatment of these materials, Li Industries contributes to lowering energy consumption and emissions in the battery production process, ultimately fostering a more sustainable supply chain for battery manufacturing.
Pascal
Seed Round in 2024
Pascal is a technology company developing solid refrigerants to replace traditional gaseous ones in HVAC systems. These refrigerants operate within similar temperature and pressure ranges but eliminate global warming potential, enabling businesses to enhance energy efficiency and reduce system size.
Varda
Series B in 2024
Varda Space Industries, Inc. is a space manufacturing startup based in San Francisco, California, founded in 2020 by Delian Asparouhov and Trae Stephens. The company specializes in creating products in space that are intended for terrestrial applications, leveraging the unique advantages of low gravity. Varda aims to establish an infrastructure for harvesting materials from asteroids, enabling the production of new products in space. This approach not only facilitates the manufacturing of innovative goods but also promotes sustainability by reducing reliance on the destructive extraction of Earth's resources.
Koloma
Series B in 2024
Koloma is a company specializing in geologic hydrogen production. It leverages proprietary technology, data, and expertise to identify and develop geologic hydrogen resources. The company's data-driven approach aims to reduce global carbon emissions, enabling businesses to lower their environmental impact.
Glydways
Series B in 2023
Glydways is a South San Francisco-based company specializing in affordable autonomous transportation systems. It designs, manufactures, installs, and operates efficient, high-capacity mobility solutions that are environmentally friendly with zero greenhouse gas emissions.
Mighty Buildings
Series B in 2023
Founded in 2017, Mighty Buildings is a pioneering construction technology company based in San Francisco. It specializes in manufacturing custom houses using proprietary 3D printing techniques, aiming to revolutionize the residential housing market by reducing waste and enhancing energy efficiency.
Spiritus
Series A in 2023
Spiritus is a climate technology company specializing in direct-air-capture systems. Its innovative approach combines the Spiritus Sorbent and Carbon Orchard, offering a scalable, modular solution for low-cost carbon dioxide removal and sequestration.
Caelux
Series A in 2023
Caelux is a renewable energy company based in Pasadena, California, founded in 2014. It specializes in developing and manufacturing perovskite-on-glass technology for the terrestrial solar and commercial space industries. This innovative technology is designed to enhance solar device efficiency while minimizing the amount of semiconducting material required, thereby reducing production costs. Caelux's products improve power production and integrate seamlessly into existing photovoltaic module manufacturing processes, allowing users to lower installed costs and boost overall performance.
TeraWatt Technology
Series C in 2023
Founded in 2017, TeraWatt Technology designs and manufactures lithium-ion rechargeable batteries for various electrified applications. The company is headquartered in Santa Clara, California with a subsidiary in Tokyo, Japan.
Realta Fusion
Seed Round in 2023
Realta Fusion develops fusion energy technology for industrial heat and power production. It combines advancements in superconducting materials, plasma physics, and computing power in a simple linear fusion reactor design, utilizing abundant fuel sources to generate zero-carbon heat and power.
LuxWall
Venture Round in 2023
LuxWall is a building materials company that designs and manufactures vacuum-insulated glass, a transparent insulation material that reduces heating and cooling losses and improves building energy efficiency. Its vacuum-insulated glass supports energy standards for commercial and residential buildings and uses technology aimed at enabling greater thermal performance. Founded in 2020 and headquartered in Ypsilanti, Michigan, LuxWall seeks to advance sustainable construction and has indicated a potential to reduce global carbon emissions by more than 0.5 gigatonnes per year, highlighting its environmental impact.
Mainspring
Series E in 2022
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
Genecis
Series A in 2022
Genecis is an early-stage organic waste processing startup that uses biotechnology to convert waste into biodegradable plastics and other high-value materials. It converts organic waste into PHA (Polyhydroxyalkanoate), a biodegradable, compostable, and non-toxic polymer that can be tuned to replace a wide variety of traditional plastics. PHA can be used for single-use plastics, clothing and textiles, automotive interiors, medical tools and products, and food contact applications.
Li Industries
Series A in 2022
Li Industries is a start-up focused on advancing lithium-ion battery recycling technologies. The company specializes in the recovery of valuable materials such as lithium, cobalt, and nickel from end-of-life batteries used in electric vehicles, consumer electronics, and other energy storage systems. By utilizing innovative direct recycling technology and a scalable electrochemical flow system, Li Industries aims to extract these essential metals efficiently and sustainably. This process not only reduces environmental waste but also supports the production of new batteries from recycled components. By optimizing the recovery and treatment of these materials, Li Industries contributes to lowering energy consumption and emissions in the battery production process, ultimately fostering a more sustainable supply chain for battery manufacturing.
TeraWatt Technology
Series B in 2022
Founded in 2017, TeraWatt Technology designs and manufactures lithium-ion rechargeable batteries for various electrified applications. The company is headquartered in Santa Clara, California with a subsidiary in Tokyo, Japan.
Nitricity
Venture Round in 2022
Nitricity is an energy company focused on renewable nitrogen fertilizer production with zero carbon emissions. It develops electrified, climate-smart fertilizer products and manufactures nitric acid and ammonia, which can be used separately or combined to produce ammonium nitrate fertilizer. The approach aims to bring products closer to farmers, enable timely application, reduce runoff, and maximize nitrogen delivery on a global scale.
Mainspring
Series E in 2022
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
Aether Diamonds
Series A in 2022
Aether Diamonds produces the world's first and only diamonds made 100% from captured carbon. Certified B Corp. 2022 Fast Company Top 10 Most Innovative Consumer Goods Companies. 2022 "Best for the World" B Corp.
Helium
Series D in 2022
Helium Systems Inc. develops Internet-of-Things (IoT) technology, focusing on sensor devices that monitor environmental factors such as temperature, humidity, barometric pressure, motion, and light. These sensors are utilized in various applications, including facility monitoring and quality control for medical products, energy management, air quality assessment, and refrigeration temperature regulation. The company offers a web and mobile dashboard for users to manage and access sensor data. Additionally, Helium operates a decentralized wireless network that enables low-power IoT devices to connect to the internet. This network incentivizes individuals to become network operators, rewarding them with a cryptocurrency for validating network transactions and contributing to the network's integrity. Incorporated in 2013 and based in San Francisco, Helium Systems continues to innovate within the IoT landscape, enhancing the ability to gather insights from smart devices.
Verdagy
Series A in 2022
Verdagy specializes in innovative water electrolysis technology for large-scale green hydrogen production. Based in Moss Landing, California, the company operates laboratory and pilot plant facilities to advance its technology platform, aiming to achieve low upfront capital costs and competitive unit economics.
Vertical Oceans
Seed Round in 2021
Vertical Oceans specializes in sustainable aquaculture, producing same-day farm-to-fork shrimp using vertical towers in urban markets. Their innovative system, the Intelligent Habitat (iHAB), combines bioengineering, hardware engineering, and computational methods to create a self-sustaining, self-cleaning modular production environment. This results in high-quality shrimp with excellent sustainability credentials.
Varda
Series A in 2021
Varda Space Industries, Inc. is a space manufacturing startup based in San Francisco, California, founded in 2020 by Delian Asparouhov and Trae Stephens. The company specializes in creating products in space that are intended for terrestrial applications, leveraging the unique advantages of low gravity. Varda aims to establish an infrastructure for harvesting materials from asteroids, enabling the production of new products in space. This approach not only facilitates the manufacturing of innovative goods but also promotes sustainability by reducing reliance on the destructive extraction of Earth's resources.
Mighty Buildings
Series B in 2021
Founded in 2017, Mighty Buildings is a pioneering construction technology company based in San Francisco. It specializes in manufacturing custom houses using proprietary 3D printing techniques, aiming to revolutionize the residential housing market by reducing waste and enhancing energy efficiency.
Fortera
Series B in 2021
Fortera is a company focused on developing innovative solutions for the cement and concrete industry with the aim of significantly reducing carbon dioxide emissions. It has created a process that captures industrial carbon dioxide emissions and mineralizes them to produce a more environmentally friendly form of concrete. This method not only addresses the substantial carbon footprint associated with traditional concrete production but also offers improved performance characteristics. By providing sustainable alternatives to conventional cement products, Fortera contributes to global efforts to mitigate climate change and enhance the environmental sustainability of construction practices.
Mainspring
Series D in 2021
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
Mighty Buildings
Series B in 2021
Founded in 2017, Mighty Buildings is a pioneering construction technology company based in San Francisco. It specializes in manufacturing custom houses using proprietary 3D printing techniques, aiming to revolutionize the residential housing market by reducing waste and enhancing energy efficiency.
Glydways
Venture Round in 2020
Glydways is a South San Francisco-based company specializing in affordable autonomous transportation systems. It designs, manufactures, installs, and operates efficient, high-capacity mobility solutions that are environmentally friendly with zero greenhouse gas emissions.
Natron Energy
Series D in 2020
Natron Energy develops sodium ion battery technologies for various industrial applications. Founded in 2012, the company specializes in stationary energy storage solutions, including UPS systems, electric vehicle charging, and grid support.
Commonwealth Fusion
Series A in 2020
Founded in 2017, Commonwealth Fusion is a research company developing fusion energy through an inexhaustible power plant. It combines proven physics with revolutionary superconducting magnet technology to accelerate the path to commercial fusion energy.
TeraWatt Technology
Seed Round in 2020
Founded in 2017, TeraWatt Technology designs and manufactures lithium-ion rechargeable batteries for various electrified applications. The company is headquartered in Santa Clara, California with a subsidiary in Tokyo, Japan.
Mighty Buildings
Series A in 2019
Founded in 2017, Mighty Buildings is a pioneering construction technology company based in San Francisco. It specializes in manufacturing custom houses using proprietary 3D printing techniques, aiming to revolutionize the residential housing market by reducing waste and enhancing energy efficiency.
Commonwealth Fusion
Series A in 2019
Founded in 2017, Commonwealth Fusion is a research company developing fusion energy through an inexhaustible power plant. It combines proven physics with revolutionary superconducting magnet technology to accelerate the path to commercial fusion energy.
Helium
Series C in 2019
Helium Systems Inc. develops Internet-of-Things (IoT) technology, focusing on sensor devices that monitor environmental factors such as temperature, humidity, barometric pressure, motion, and light. These sensors are utilized in various applications, including facility monitoring and quality control for medical products, energy management, air quality assessment, and refrigeration temperature regulation. The company offers a web and mobile dashboard for users to manage and access sensor data. Additionally, Helium operates a decentralized wireless network that enables low-power IoT devices to connect to the internet. This network incentivizes individuals to become network operators, rewarding them with a cryptocurrency for validating network transactions and contributing to the network's integrity. Incorporated in 2013 and based in San Francisco, Helium Systems continues to innovate within the IoT landscape, enhancing the ability to gather insights from smart devices.
Boosted USA
Series B in 2018
Boosted USA, established in 2012 and based in Mountain View, California, specializes in designing and manufacturing electric skateboards. These boards are controlled wirelessly via a handheld device and are renowned for their power, portability, and fun riding experience. They cater to both recreational users and commuters, offering a range of models with customizable features such as ride modes, battery options, and braking systems. Boosted USA also operates battery recycling centers in the United States and sells its products online and internationally.
Mighty Buildings
Venture Round in 2018
Founded in 2017, Mighty Buildings is a pioneering construction technology company based in San Francisco. It specializes in manufacturing custom houses using proprietary 3D printing techniques, aiming to revolutionize the residential housing market by reducing waste and enhancing energy efficiency.
Mainspring
Series C in 2018
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
Bidgely
Series C in 2018
Bidgely is a technology company that provides disaggregation-powered utility analytics and customer engagement solutions. Its cloud-based HomeBeat platform disaggregates household energy consumption to the appliance level, enabling utilities to understand usage patterns and tailor energy programs. The UtilityAI Platform delivers customer energy insights based on actual energy habits, supporting energy efficiency initiatives and consumer engagement for utilities serving residential customers worldwide. Bidgely uses machine learning to monitor energy data and identify appliance-level usage, helping utilities manage peak demand and reimagine customer engagement. The company serves utilities globally and is headquartered in Mountain View, California, with an office in Bengaluru, India.
BBOXX
Series C in 2016
BBOXX designs, manufactures, and distributes plug-and-play solar power systems to expand access to electricity in Africa and other developing regions. The company offers solar home systems, lighting, radios, TVs, phone chargers, and related products, supported by installation and maintenance services and remote monitoring. It pursues innovative financing models and digital platforms to enable individuals, businesses, and governments to access reliable, affordable utilities, including off-grid energy experiences in rural areas. BBOXX serves customers through distributors in Africa, the United Kingdom, and international markets, with a focus on customer service and scalable solutions.
Helium
Series B in 2016
Helium Systems Inc. develops Internet-of-Things (IoT) technology, focusing on sensor devices that monitor environmental factors such as temperature, humidity, barometric pressure, motion, and light. These sensors are utilized in various applications, including facility monitoring and quality control for medical products, energy management, air quality assessment, and refrigeration temperature regulation. The company offers a web and mobile dashboard for users to manage and access sensor data. Additionally, Helium operates a decentralized wireless network that enables low-power IoT devices to connect to the internet. This network incentivizes individuals to become network operators, rewarding them with a cryptocurrency for validating network transactions and contributing to the network's integrity. Incorporated in 2013 and based in San Francisco, Helium Systems continues to innovate within the IoT landscape, enhancing the ability to gather insights from smart devices.
BBOXX
Venture Round in 2015
BBOXX designs, manufactures, and distributes plug-and-play solar power systems to expand access to electricity in Africa and other developing regions. The company offers solar home systems, lighting, radios, TVs, phone chargers, and related products, supported by installation and maintenance services and remote monitoring. It pursues innovative financing models and digital platforms to enable individuals, businesses, and governments to access reliable, affordable utilities, including off-grid energy experiences in rural areas. BBOXX serves customers through distributors in Africa, the United Kingdom, and international markets, with a focus on customer service and scalable solutions.
Bidgely
Series B in 2015
Bidgely is a technology company that provides disaggregation-powered utility analytics and customer engagement solutions. Its cloud-based HomeBeat platform disaggregates household energy consumption to the appliance level, enabling utilities to understand usage patterns and tailor energy programs. The UtilityAI Platform delivers customer energy insights based on actual energy habits, supporting energy efficiency initiatives and consumer engagement for utilities serving residential customers worldwide. Bidgely uses machine learning to monitor energy data and identify appliance-level usage, helping utilities manage peak demand and reimagine customer engagement. The company serves utilities globally and is headquartered in Mountain View, California, with an office in Bengaluru, India.
Virgin Hyperloop
Venture Round in 2015
Hyperloop One, Inc. is focused on the design and development of a high-speed tubular transit system that employs magnetic levitation technology to facilitate the rapid transportation of passengers and cargo. Founded in 2014 and headquartered in Los Angeles, California, the company aims to provide direct and sustainable transportation solutions. Hyperloop One's innovative system allows for speeds of up to 760 miles per hour, utilizing a vacuum tube to optimize travel efficiency. The company collaborates with various partners, including renowned firms such as Parsons, ARUP, and McKinsey, to enhance its technology and implementation strategies. Originally known as Hyperloop Technologies, Inc., the company rebranded in May 2016 to reflect its evolving mission within the transportation sector.
SES
Series B in 2015
SolidEnergy Systems Corp. develops and manufactures rechargeable lithium metal batteries primarily for applications in drones, wearables, smartphones, and electric vehicles. Founded in 2012 and based in Woburn, Massachusetts, the company focuses on producing high-performance lithium metal batteries and supplying essential materials, such as anodes and electrolytes, to major lithium-ion cell manufacturers. These materials can be integrated into existing manufacturing processes, allowing for scalability without significant infrastructure investments. SolidEnergy's pilot-scale production caters to prototype demonstrations and specialized aerospace markets, while its future growth is aimed at mainstream sectors like consumer electronics and electric vehicles. Additionally, the company is involved in developing AI-powered safety algorithms and recycling solutions, positioning itself as an integrated battery manufacturer with a commitment to innovation and sustainability.
Sakti3
Series C in 2015
Sakti3, Inc. is a Michigan-based company focused on the development of solid-state rechargeable lithium-ion battery technology. Founded in 2007 and headquartered in Ann Arbor, the company aims to enhance battery performance for electric vehicles and portable electronics. By creating solid-state battery cells, Sakti3 seeks to provide a safer and more efficient alternative to traditional battery technologies, facilitating the transition to electric-powered transportation and devices. As of 2015, Sakti3 operates as a subsidiary of Dyson Ltd.
Helium
Series A in 2014
Helium Systems Inc. develops Internet-of-Things (IoT) technology, focusing on sensor devices that monitor environmental factors such as temperature, humidity, barometric pressure, motion, and light. These sensors are utilized in various applications, including facility monitoring and quality control for medical products, energy management, air quality assessment, and refrigeration temperature regulation. The company offers a web and mobile dashboard for users to manage and access sensor data. Additionally, Helium operates a decentralized wireless network that enables low-power IoT devices to connect to the internet. This network incentivizes individuals to become network operators, rewarding them with a cryptocurrency for validating network transactions and contributing to the network's integrity. Incorporated in 2013 and based in San Francisco, Helium Systems continues to innovate within the IoT landscape, enhancing the ability to gather insights from smart devices.
Seeo
Series E in 2014
Founded in 2007, Seeo develops and manufactures rechargeable lithium-ion batteries using a nano-structured polymer electrolyte. These entirely solid-state batteries are designed to be safe, lightweight, and durable, serving markets such as transportation, electric grid, and telecommunication backup.
Avogy
Series B in 2014
Avogy, Inc. is a company based in San Jose, California, founded in 2010, that specializes in the design, development, and manufacturing of vertical gallium nitride (GaN) based power semiconductor devices. The company produces diodes, JFETs, and vertical GaN transistors, which are essential for improving the efficiency and reliability of power conversion systems. Avogy's innovative products enable system manufacturers to significantly reduce power consumption, size, weight, and costs of various applications, including data center servers, switches, routers, solar and wind inverters, and electric and hybrid vehicles. By focusing on GaN on GaN technology, Avogy aims to enhance the performance and reliability of power electronics, thereby supporting advancements in electrical characterization, reliability testing, and product development for its clients.
Ambri
Series C in 2014
Ambri develops grid-scale energy storage technology based on liquid metal battery cells, designed to provide low-cost, long-duration storage for electric grids and renewable energy systems. Its systems are offered as ready-to-install DC containers that enable daily cycling with high efficiency, long lifespan, and safety, and are positioned to replace diesel generators at hyperscale data centers while stabilizing the grid with intermittent renewables. Founded in 2010 and based in Marlborough, Massachusetts, Ambri focuses on scalable storage solutions for grid reliability, renewable integration, and data-center applications.
Bidgely
Venture Round in 2014
Bidgely is a technology company that provides disaggregation-powered utility analytics and customer engagement solutions. Its cloud-based HomeBeat platform disaggregates household energy consumption to the appliance level, enabling utilities to understand usage patterns and tailor energy programs. The UtilityAI Platform delivers customer energy insights based on actual energy habits, supporting energy efficiency initiatives and consumer engagement for utilities serving residential customers worldwide. Bidgely uses machine learning to monitor energy data and identify appliance-level usage, helping utilities manage peak demand and reimagine customer engagement. The company serves utilities globally and is headquartered in Mountain View, California, with an office in Bengaluru, India.
Caelux
Venture Round in 2014
Caelux is a renewable energy company based in Pasadena, California, founded in 2014. It specializes in developing and manufacturing perovskite-on-glass technology for the terrestrial solar and commercial space industries. This innovative technology is designed to enhance solar device efficiency while minimizing the amount of semiconducting material required, thereby reducing production costs. Caelux's products improve power production and integrate seamlessly into existing photovoltaic module manufacturing processes, allowing users to lower installed costs and boost overall performance.
BBOXX
Series A in 2013
BBOXX designs, manufactures, and distributes plug-and-play solar power systems to expand access to electricity in Africa and other developing regions. The company offers solar home systems, lighting, radios, TVs, phone chargers, and related products, supported by installation and maintenance services and remote monitoring. It pursues innovative financing models and digital platforms to enable individuals, businesses, and governments to access reliable, affordable utilities, including off-grid energy experiences in rural areas. BBOXX serves customers through distributors in Africa, the United Kingdom, and international markets, with a focus on customer service and scalable solutions.
Kior
Post in 2013
KiOR, Inc. is a renewable fuels company that specializes in the production of cellulosic gasoline and diesel derived from lignocellulosic biomass. Utilizing its proprietary biomass-to-cellulosic fuel technology platform, the company aims to provide sustainable fuel alternatives to refiners, terminal and rack owners, as well as fleet operators. Founded in 2007 and headquartered in Pasadena, Texas, KiOR is committed to addressing the growing demand for renewable energy solutions in the transportation sector.
Coskata
Debt Financing in 2013
Coskata, Inc. is a renewable energy company focused on producing liquid fuels through innovative biological processes. The company specializes in the development of technologies for converting various input materials, including natural gas, wood, and industrial waste, into cellulosic ethanol. Utilizing proprietary microorganisms and advanced bioreactor designs, Coskata aims to deliver solutions that enhance economic viability, environmental sustainability, and national security. Its capabilities in molecular biology and process engineering enable the effective transformation of diverse resources into valuable fuels and chemicals, positioning Coskata as a leader in the renewable energy sector.
Bidgely
Series A in 2013
Bidgely is a technology company that provides disaggregation-powered utility analytics and customer engagement solutions. Its cloud-based HomeBeat platform disaggregates household energy consumption to the appliance level, enabling utilities to understand usage patterns and tailor energy programs. The UtilityAI Platform delivers customer energy insights based on actual energy habits, supporting energy efficiency initiatives and consumer engagement for utilities serving residential customers worldwide. Bidgely uses machine learning to monitor energy data and identify appliance-level usage, helping utilities manage peak demand and reimagine customer engagement. The company serves utilities globally and is headquartered in Mountain View, California, with an office in Bengaluru, India.
LightSail Energy
Series D in 2013
LightSail Energy focuses on the development of advanced energy storage systems that utilize compressed air technology. The company aims to modernize the electrical grid globally by providing efficient, grid-scale energy storage solutions. These systems are designed to enhance the reliability of renewable energy sources, such as solar and wind, allowing for on-demand energy delivery. By shifting its emphasis from vehicle-based technologies to large-scale applications, LightSail Energy offers clients cost-effective options for energy storage, contributing to a more sustainable energy landscape.
Natron Energy
Series A in 2013
Natron Energy develops sodium ion battery technologies for various industrial applications. Founded in 2012, the company specializes in stationary energy storage solutions, including UPS systems, electric vehicle charging, and grid support.
Stion
Private Equity Round in 2012
Stion Corporation is a manufacturer of thin-film solar modules, established in 2006 and headquartered in San Jose, California, with a manufacturing facility in Hattiesburg, Mississippi. The company specializes in developing high-efficiency solar modules that offer reduced material and processing costs, enhancing their power output and reliability. Stion’s products are designed for a variety of applications, including residential, commercial, utility, and off-grid uses. The company markets its solar modules through a network of authorized dealers both in the United States and internationally. By utilizing innovative cell architecture and all-weather construction, Stion aims to lower the overall costs of electricity and improve the efficiency of solar power generation.
LightSail Energy
Series D in 2012
LightSail Energy focuses on the development of advanced energy storage systems that utilize compressed air technology. The company aims to modernize the electrical grid globally by providing efficient, grid-scale energy storage solutions. These systems are designed to enhance the reliability of renewable energy sources, such as solar and wind, allowing for on-demand energy delivery. By shifting its emphasis from vehicle-based technologies to large-scale applications, LightSail Energy offers clients cost-effective options for energy storage, contributing to a more sustainable energy landscape.
Bidgely
Seed Round in 2012
Bidgely is a technology company that provides disaggregation-powered utility analytics and customer engagement solutions. Its cloud-based HomeBeat platform disaggregates household energy consumption to the appliance level, enabling utilities to understand usage patterns and tailor energy programs. The UtilityAI Platform delivers customer energy insights based on actual energy habits, supporting energy efficiency initiatives and consumer engagement for utilities serving residential customers worldwide. Bidgely uses machine learning to monitor energy data and identify appliance-level usage, helping utilities manage peak demand and reimagine customer engagement. The company serves utilities globally and is headquartered in Mountain View, California, with an office in Bengaluru, India.
Solum
Series B in 2012
Solum develops a field-deployable measurement tool designed to provide farmers with immediate insights into soil nutrient requirements. By enabling precise fertilizer application, Solum helps farmers optimize costs and enhance crop yields. The technology not only supports agricultural efficiency but also promotes sustainability by minimizing nitrogen runoff, which contributes to aquatic dead zones, and addressing nitrous oxide emissions, a significant greenhouse gas linked to ozone depletion. Through its innovative soil testing services, Solum aims to transform farming practices for better environmental outcomes.
Ambri
Series B in 2012
Ambri develops grid-scale energy storage technology based on liquid metal battery cells, designed to provide low-cost, long-duration storage for electric grids and renewable energy systems. Its systems are offered as ready-to-install DC containers that enable daily cycling with high efficiency, long lifespan, and safety, and are positioned to replace diesel generators at hyperscale data centers while stabilizing the grid with intermittent renewables. Founded in 2010 and based in Marlborough, Massachusetts, Ambri focuses on scalable storage solutions for grid reliability, renewable integration, and data-center applications.
NanoH2O
Venture Round in 2012
NanoH2O is a manufacturer specializing in advanced reverse osmosis membranes designed for water desalination and reuse. The company enhances traditional polymer-based membranes by incorporating a nano-structured material, which improves key membrane properties such as throughput, salt and contaminant rejection, and fouling resistance. NanoH2O's membranes are suitable for various applications, including seawater and brackish water desalination, as well as wastewater reclamation. By focusing on these innovations, the company aims to lower the costs associated with desalination while simultaneously enhancing energy efficiency and productivity in water treatment processes.
Virdia
Debt Financing in 2012
Virdia, formerly known as HCL CleanTech, is a prominent developer specializing in the conversion of lignocellulosic biomass into cellulosic sugars and lignin for applications in the renewable chemicals, bio-energy, and nutrition sectors. Utilizing its proprietary CASE™ process, the company transforms a diverse range of feedstocks, including wood, energy crops, and agricultural residues, into highly refined sugars and lignin. This innovative low-temperature process achieves high yields of sugars from biomass while maintaining a minimal environmental impact through the near complete recycling of acids and solvents used during production. Virdia is guided by an experienced management team with extensive backgrounds in corn processing, chemicals, and biochemicals.
Kior
Post in 2012
KiOR, Inc. is a renewable fuels company that specializes in the production of cellulosic gasoline and diesel derived from lignocellulosic biomass. Utilizing its proprietary biomass-to-cellulosic fuel technology platform, the company aims to provide sustainable fuel alternatives to refiners, terminal and rack owners, as well as fleet operators. Founded in 2007 and headquartered in Pasadena, Texas, KiOR is committed to addressing the growing demand for renewable energy solutions in the transportation sector.
Stion
Private Equity Round in 2011
Stion Corporation is a manufacturer of thin-film solar modules, established in 2006 and headquartered in San Jose, California, with a manufacturing facility in Hattiesburg, Mississippi. The company specializes in developing high-efficiency solar modules that offer reduced material and processing costs, enhancing their power output and reliability. Stion’s products are designed for a variety of applications, including residential, commercial, utility, and off-grid uses. The company markets its solar modules through a network of authorized dealers both in the United States and internationally. By utilizing innovative cell architecture and all-weather construction, Stion aims to lower the overall costs of electricity and improve the efficiency of solar power generation.
NanoH2O
Venture Round in 2011
NanoH2O is a manufacturer specializing in advanced reverse osmosis membranes designed for water desalination and reuse. The company enhances traditional polymer-based membranes by incorporating a nano-structured material, which improves key membrane properties such as throughput, salt and contaminant rejection, and fouling resistance. NanoH2O's membranes are suitable for various applications, including seawater and brackish water desalination, as well as wastewater reclamation. By focusing on these innovations, the company aims to lower the costs associated with desalination while simultaneously enhancing energy efficiency and productivity in water treatment processes.
Soraa
Series B in 2011
Soraa is a cleantech startup specializing in LED technology and lasers, with a focus on producing high-quality, natural light. The company has pioneered full-spectrum color rendering LED light using proprietary technology manufactured in California. Soraa's products are designed to enhance well-being, productivity, and emotional states by mimicking natural light indoors. The company conducts research to develop insights and expertise for delivering breakthrough lighting solutions.
Solum
Series A in 2011
Solum develops a field-deployable measurement tool designed to provide farmers with immediate insights into soil nutrient requirements. By enabling precise fertilizer application, Solum helps farmers optimize costs and enhance crop yields. The technology not only supports agricultural efficiency but also promotes sustainability by minimizing nitrogen runoff, which contributes to aquatic dead zones, and addressing nitrous oxide emissions, a significant greenhouse gas linked to ozone depletion. Through its innovative soil testing services, Solum aims to transform farming practices for better environmental outcomes.
Danotek Motion Technologies
Series B in 2011
Danotek Motion Technologies Inc, founded in 2001, in Ann Arbor, Michigan is an ISO 9001:2000 certified technology innovator. Danotek develops clean, energy efficient, generators, electrical conversion systems, brushless motors and electronics controls for alternative energy and advanced transportation applications.
Danotek has developed a number of patent-pending innovative products that include variable speed permanent magnet (PM) generators and brushless motors with integrated electronics for wind power, fuel cell, CHP, auxiliary power and electric and hybrid electric vehicles. Their designs represent industry leadership and are expected to replace inefficient and unreliable systems with added extensive control features.
Coskata
Series D in 2011
Coskata, Inc. is a renewable energy company focused on producing liquid fuels through innovative biological processes. The company specializes in the development of technologies for converting various input materials, including natural gas, wood, and industrial waste, into cellulosic ethanol. Utilizing proprietary microorganisms and advanced bioreactor designs, Coskata aims to deliver solutions that enhance economic viability, environmental sustainability, and national security. Its capabilities in molecular biology and process engineering enable the effective transformation of diverse resources into valuable fuels and chemicals, positioning Coskata as a leader in the renewable energy sector.
Seeo
Series D in 2011
Founded in 2007, Seeo develops and manufactures rechargeable lithium-ion batteries using a nano-structured polymer electrolyte. These entirely solid-state batteries are designed to be safe, lightweight, and durable, serving markets such as transportation, electric grid, and telecommunication backup.
Ciris Energy
Series B in 2011
Ciris Energy, Inc. is a technology company founded in 2007 and based in Centennial, Colorado. It specializes in the development of proprietary technologies aimed at producing electricity from buried coal and other hydrocarbon deposits. The company focuses on biologically converting coal to methane in large-scale quantities, striving to create a more environmentally responsible and economically efficient method of producing natural gas from coal. Through its innovative approaches, Ciris Energy seeks to enable clients to access coal as a renewable form of energy.
Matrix Industries
Seed Round in 2011
Matrix Industries, Inc. is a technology company based in Menlo Park, California, specializing in the manufacture of thermoelectric products designed for energy harvesting. Founded in 2011, the company is best known for its MATRIX PowerWatch, a smartwatch that harnesses body heat to power its functions, eliminating the need for traditional charging. The watch not only tracks calories burned and activity levels but also monitors sleep patterns. In addition to the smartwatch, Matrix Industries offers various energy harvesting components, including boost converters and thermoelectric energy harvesters, which are distributed through a network of distributors. The company was previously known as Silicium Energy, Inc.
QuantumScape
Venture Round in 2011
QuantumScape is a renewable energy company focused on advancing solid-state battery technology to enhance the performance and range of electric vehicles. Founded in 2010 by Jagdeep Singh in San Jose, California, the company aims to transform the battery industry by creating a solid-state battery that offers significantly higher energy storage capacity compared to traditional batteries. QuantumScape is developing next-generation solid-state lithium-metal batteries, featuring an innovative anode-less cell design that improves energy density while reducing material costs and streamlining manufacturing processes. Through these advancements, QuantumScape seeks to facilitate the widespread adoption of electric vehicles.
EchoFirst
Series B in 2010
EchoFirst is a manufacturer specializing in integrated solar energy systems designed to meet the electric and heating needs of residential properties. Its innovative Echo solar systems surpass the energy output of traditional photovoltaic systems by generating electricity along with hot water for household uses such as washing and bathing, as well as providing thermal energy for home heating and cooling. The company serves a diverse clientele, including homeowners, installation partners, and developers of new homes, aiming to enhance energy efficiency and sustainability in residential environments.
Sakti3
Series B in 2010
Sakti3, Inc. is a Michigan-based company focused on the development of solid-state rechargeable lithium-ion battery technology. Founded in 2007 and headquartered in Ann Arbor, the company aims to enhance battery performance for electric vehicles and portable electronics. By creating solid-state battery cells, Sakti3 seeks to provide a safer and more efficient alternative to traditional battery technologies, facilitating the transition to electric-powered transportation and devices. As of 2015, Sakti3 operates as a subsidiary of Dyson Ltd.
Coskata
Series D in 2010
Coskata, Inc. is a renewable energy company focused on producing liquid fuels through innovative biological processes. The company specializes in the development of technologies for converting various input materials, including natural gas, wood, and industrial waste, into cellulosic ethanol. Utilizing proprietary microorganisms and advanced bioreactor designs, Coskata aims to deliver solutions that enhance economic viability, environmental sustainability, and national security. Its capabilities in molecular biology and process engineering enable the effective transformation of diverse resources into valuable fuels and chemicals, positioning Coskata as a leader in the renewable energy sector.
Kior
Private Equity Round in 2010
KiOR, Inc. is a renewable fuels company that specializes in the production of cellulosic gasoline and diesel derived from lignocellulosic biomass. Utilizing its proprietary biomass-to-cellulosic fuel technology platform, the company aims to provide sustainable fuel alternatives to refiners, terminal and rack owners, as well as fleet operators. Founded in 2007 and headquartered in Pasadena, Texas, KiOR is committed to addressing the growing demand for renewable energy solutions in the transportation sector.
Stion
Series D in 2010
Stion Corporation is a manufacturer of thin-film solar modules, established in 2006 and headquartered in San Jose, California, with a manufacturing facility in Hattiesburg, Mississippi. The company specializes in developing high-efficiency solar modules that offer reduced material and processing costs, enhancing their power output and reliability. Stion’s products are designed for a variety of applications, including residential, commercial, utility, and off-grid uses. The company markets its solar modules through a network of authorized dealers both in the United States and internationally. By utilizing innovative cell architecture and all-weather construction, Stion aims to lower the overall costs of electricity and improve the efficiency of solar power generation.
Gevo
Series D in 2010
Gevo specializes in producing renewable fuels and chemicals using sustainable resources. Its primary products include gasoline, jet fuel, diesel fuel, isobutanol, and renewable natural gas. The company aims to reduce greenhouse gas emissions by providing low-carbon alternatives to fossil fuels.
Solum
Seed Round in 2010
Solum develops a field-deployable measurement tool designed to provide farmers with immediate insights into soil nutrient requirements. By enabling precise fertilizer application, Solum helps farmers optimize costs and enhance crop yields. The technology not only supports agricultural efficiency but also promotes sustainability by minimizing nitrogen runoff, which contributes to aquatic dead zones, and addressing nitrous oxide emissions, a significant greenhouse gas linked to ozone depletion. Through its innovative soil testing services, Solum aims to transform farming practices for better environmental outcomes.
Mainspring
Seed Round in 2010
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
QuantumScape
Seed Round in 2010
QuantumScape is a renewable energy company focused on advancing solid-state battery technology to enhance the performance and range of electric vehicles. Founded in 2010 by Jagdeep Singh in San Jose, California, the company aims to transform the battery industry by creating a solid-state battery that offers significantly higher energy storage capacity compared to traditional batteries. QuantumScape is developing next-generation solid-state lithium-metal batteries, featuring an innovative anode-less cell design that improves energy density while reducing material costs and streamlining manufacturing processes. Through these advancements, QuantumScape seeks to facilitate the widespread adoption of electric vehicles.
Danotek Motion Technologies
Venture Round in 2009
Danotek Motion Technologies Inc, founded in 2001, in Ann Arbor, Michigan is an ISO 9001:2000 certified technology innovator. Danotek develops clean, energy efficient, generators, electrical conversion systems, brushless motors and electronics controls for alternative energy and advanced transportation applications.
Danotek has developed a number of patent-pending innovative products that include variable speed permanent magnet (PM) generators and brushless motors with integrated electronics for wind power, fuel cell, CHP, auxiliary power and electric and hybrid electric vehicles. Their designs represent industry leadership and are expected to replace inefficient and unreliable systems with added extensive control features.
Amyris
Series C in 2009
Amyris is a biotechnology company that engineers microbes to produce sustainable alternatives to petroleum-based products. It focuses on creating high-value ingredients for clean health and beauty, flavor and fragrance markets, as well as pharmaceuticals. The company's technology platform enables it to convert plant sugars into various products, supporting industries such as cosmetics, fuels, and nutraceuticals.
Seeo
Series C in 2009
Founded in 2007, Seeo develops and manufactures rechargeable lithium-ion batteries using a nano-structured polymer electrolyte. These entirely solid-state batteries are designed to be safe, lightweight, and durable, serving markets such as transportation, electric grid, and telecommunication backup.
Gevo
Venture Round in 2009
Gevo specializes in producing renewable fuels and chemicals using sustainable resources. Its primary products include gasoline, jet fuel, diesel fuel, isobutanol, and renewable natural gas. The company aims to reduce greenhouse gas emissions by providing low-carbon alternatives to fossil fuels.
SeaMicro
Venture Round in 2009
SeaMicro is a company focused on developing innovative low-power data center solutions aimed at addressing the escalating energy consumption of traditional servers. With the power demands of servers having more than doubled over the past six years, SeaMicro has engineered a new server architecture that utilizes advanced CPU design, virtualization, supercomputing, and networking technologies. Their compact servers consume only one-quarter of the power and occupy one-sixth of the space of conventional servers, making them an efficient alternative for scale-out infrastructures. Furthermore, SeaMicro's servers are designed to be plug-and-play, ensuring compatibility without the need for modifications to existing software operating systems, applications, or management systems. This approach positions SeaMicro as a leader in transforming the data center landscape into a more sustainable and efficient environment.
Virdia
Series A in 2009
Virdia, formerly known as HCL CleanTech, is a prominent developer specializing in the conversion of lignocellulosic biomass into cellulosic sugars and lignin for applications in the renewable chemicals, bio-energy, and nutrition sectors. Utilizing its proprietary CASE™ process, the company transforms a diverse range of feedstocks, including wood, energy crops, and agricultural residues, into highly refined sugars and lignin. This innovative low-temperature process achieves high yields of sugars from biomass while maintaining a minimal environmental impact through the near complete recycling of acids and solvents used during production. Virdia is guided by an experienced management team with extensive backgrounds in corn processing, chemicals, and biochemicals.
Ausra
Venture Round in 2009
Ausra is a manufacturer and developer of utility-scale solar technologies aimed at addressing global electricity demands in an environmentally responsible manner. The company specializes in solar thermal power infrastructure, particularly through its compact linear Fresnel reflector systems, which utilize focused sunlight to boil water and generate high-pressure steam that powers conventional turbine generators. Ausra is also advancing low-cost thermal energy storage systems, enabling the generation of solar electric power on demand, both during daylight and nighttime hours. By providing zero-carbon power plants, Ausra offers a viable alternative to fossil-fuel-based electricity generation, delivering energy at competitive market prices while minimizing emissions associated with traditional fuel combustion.
Calera
Seed Round in 2009
Calera Corporation is focused on carbon sequestration, aiming to combat global warming and ocean acidification by capturing greenhouse gases, particularly carbon dioxide, from the atmosphere. Established in 2007 and headquartered in Los Gatos, California, the company works to reduce atmospheric carbon levels through innovative technologies. Calera has formed a strategic alliance with Bechtel Power Corporation to enhance its efforts in this domain.
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